Nht Evolution System Users Manual

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Evolution

Owner’s

Manual

Setup

Guide

1. READ INSTRUCTIONS - All safety and operating instructions should be read before the appliance is operated.

2. RETAIN INSTRUCTIONS - Safety and operating instructions should be retained for future reference.

3. HEED WARNINGS - All warnings on the appliance and in operating instructions should be adhered to.

4. FOLLOW INSTRUCTIONS - All operating and use instructions should be followed.

5. WATER AND MOISTURE- The appliance should not be used near water - near bathtub, washbowl, kitchen sink, laundry tub; in a wet base-

ment near a swimming pool, etc.

6. CARTS AND STANDS - Do not place this product on an unstable cart, stand, tripod, bracket, or table. The appliance

should be used only with a cart or stand that is recommended by the manufacturer.

7. VENTILATION - The appliance should be situated so that its location and position do not interfere with proper ventila-

tion. The appliance should not be situated on a bed, sofa, rug, or any surface that may obstruct cabinet openings.

8. HEAT - The appliance should be situated away from heat sources such as radiators, heat registers, stoves, or other

devices (including amplifiers) that produce heat.

9. POWER SOURCES - This product should be operated only from the type of power source indicated on the marking label.

If you are not sure of the type power supply in your home, consult your product dealer or local power company. For products intended to oper-

ate from battery power or other sources, refer to the operating instructions.

10. POWER CORD PROTECTION - Power supply cords should be routed so that they are not likely to be walked upon or pinched by items

placed upon or against them, paying attention to cords and plugs, convenience receptacles, and the point where they exit from the appliance.

11. POLARIZED PLUG - This appliance is equipped with a polarized line plug (a plug having one blade wider than the other). This plug will fit

into the power outlet only one way. This is a safety feature. If you are unable to insert the plug fully into the outlet, try reversing the plug. If the

plug still fails to fit, contact your electrician to replace your obsolete outlet. Do not attempt to defeat this safety feature.

12. LIGHTNING - For added protection for this product during a lightning storm, or when it is left unattended and unused for long periods of time,

unplug it from the wall outlet and disconnect the antenna or cable system. This will prevent damage to the product due to lightning and power

line surges.

13. OVERLOADING - Do not overload wall outlets, extension cords, or integral convenience receptacles, as this can result in a risk of fire or

electric shock.

14. CLEANING - Unplug this product from the wall outlet before cleaning. Do not use liquid cleaners or aerosol cleaners. Use a damp cloth for

cleaning.

15. NON-USE PERIODS - This amplifier should be unplugged from the outlet when the appliance is left unused for a long period of time.

16. OBJECT AND LIQUID ENTRY - Never push objects of any kind into this product through openings, as they may touch dangerous voltage

points or short-out parts that could result in a fire or electric shock. Never spill liquid of any kind on this product.

17. DAMAGE REQUIRING SERVICE - The appliance should be serviced by qualified personnel when:

a. The power supply cord or plug has been damaged; or

b. Objects have fallen on or liquid has been spilled into the appliance; or

c. The appliance has been exposed to rain; or

d. The appliance does not appear to operate normally or exhibits a marked change in performance; or

e. The appliance has been dropped or the enclosure is damaged.

18. SERVICING - Do not attempt to service this product yourself, as opening or removing covers may expose you to dangerous voltage or other

hazards. Refer all servicing to qualified service personnel. For service warranty information call the NHT Hotline number: 1-800-NHT-9993.

19. REPLACEMENT PARTS - When replacement parts are required, be sure the service technician has used replacement parts specified by

the manufacturer or that have the same characteristics as the original part. Unauthorized substitution may result in fire, electric shock, or other

hazards.

20. SAFETY CHECK - Upon completion of any service or repairs to this product, ask the service technician to perform safety checks to deter-

mine that the product is in proper operating condition.

IMPORTANT SAFETY INSTRUCTIONS

The lightning flash with the arrowhead symbol, within an equilateral triangle, is intended to alert the user to the presence of uninsulated

“dangerous voltage” within the product’s enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons.

The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance

(servicing) instructions in the literature accompanying the appliance.

WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE.

THE APPARATUS SHALL NOT BE EXPOSED TO DRIPPING OR SPLASHING AND THAT NO OBJECTS FILLED WITH LIQUIDS, SUCH

AS VASES, SHALL BE PLACED ON THE APPARATUS

CAUTION

RISK OF ELECTRIC SHOCK

DO NOT OPEN

CAUTION: TO REDUCE RISK OF ELECTRICAL SHOCK, DO NOT REMOVE COVER (OR BACK). NO

USER SERVICEABLE PARTS INSIDE. REFER TO QUALIFIED SERVICE PERSONNEL.

CAUTION

TO PREVENT ELECTRIC SHOCK, DO NOT USE THIS (POLARIZED) PLUG WITH AN EXTENSION CORD, RECEP-

TACLE OR OTHER OUTLET UNLESS THE BLADES CAN BE FULLY INSERTED TO PREVENT BLADE EXPOSURE.

Evolution User Guide - Contents

1.0 Intro

1.1 Introduction, About This

Owner's Manual

1.2 Description By Model

1.3 Identifying Your System

2.0 Getting Organized

2.1 Unpacking

2.2 Parts List

3.0 Speaker Placement

3.1 2 Channel Stereo

3.2 5.1 Digital Surround Sound

3.3 Enhanced Digital Surround Formats

3.4 Center Channel

3.5 Subwoofers

3.6 Electronics

4.0 System Assembly

4.1 Supplies and Tools

4.2 Monitor Parts Assembly

4.3 T5 and T6 Tower Assembly

4.4 Assembling Monitors to Pedistals

5.0 Wiring Your Speakers

5.1 General Guides to Wire Layout

5.2 Speaker Phase

5.3 Connecting Speaker Wire

5.4 T5 and T6 Tower Wiring

5.5 Wiring For Monaural Bass

5.6 System Wiring Diagrams

6.0 Connecting Evolution Electronics to Your System

6.1 Signal Connections

6.2 Power Connections

7.0 Basic Settings for the X1 Active Crossover

8.0 X1 Bass Manager/ Active Crossover

8.1 Design

8.2 Placement

8.3 Explanation of Features

8.4 System Status Indicators

8.5 Fine Tuning

9.0 A1 Monaural Amplifier

9.1 Design

9.2 Placement

9.3 Rack Mounting the X1 and or A1

9.4 Power/Standby Mode

9.5 Courtesy Lights

9.6 System Status Indicators

9.7 Replacing the Fuse

9.8 Changing the Line Voltage Setting

10.0 Maintaining Your System

11.0 Evolution Technology

11.1 Monitor Technology

11.2 What is Virtual F.I.G.?

11.3 Boundary Switch

11.4 High Dynamic Range/Low Power

Compression

11.5 Orientation Independent Dispersion

12.0 Glossary of Terms

13.0 Trouble Shooting

14.0 Specifications

1.1 Introduction, About this Owner's Manual

Congratulations on your purchase of an

Evolution System. We believe Evolution to be

the most flexible, high performance loudspeaker

collection available. Along with this manual, we

have included the following tools to assist you

with the setup of your Evolution system:

NHT Combination #2/#3 Phillips Screwdriver

NHT Binding Post Wrench with Bonus Bottle

Opener

Black Cotton Gloves

This Owner’s Manual will provide instructions for

initial assembly and connection of your system

and serve as an ongoing reference tool. The

assembly required is very simple and not time

consuming. The Manual is organized in logical

steps that will quickly take you from unpacking

to sitting back and enjoying the amazing sound

of Evolution.

If you require assistance at any time during the

assembly or installation of your Evolution sys-

tem, contact your authorized NHT dealer or call

our Customer Hotline at 1-800-NHT-9993 (648-

9993).

1.2 Description by Model

Monitors

M5 - Designed for small to

medium sized rooms. The

compact M5 is a 3-way,

acoustic suspension, mag-

netically shielded monitor employing (2) 5.25"

woofers, a 3" midrange and a 1" aluminum

dome tweeter.

M6 - Designed for medi-

um to large rooms. The

high output M6 is a 3-way,

acoustic suspension,

magnetically shielded monitor employing (2)

6.5" woofers, a 4" midrange and a 1" aluminum

dome tweeter.

Free Standing Subwoofers

W1 - The cabinet portion of

the U1 Powered Subwoofer

system. The W1 subwoofer

module employs dual, oppos-

ing 12" aluminum cone

woofers in a surprisingly compact enclosure.

W2 - The cabinet portion of

the U2 Powered

Subwoofer system. The

W2 subwoofer is only

available and used in

pairs. Each cabinet contains a 12" front firing,

aluminum cone woofer. This system is ideal for

in-cabinet or built in applications.

Tower Subwoofers

B5 - The B5 subwoofer bass mod-

ule, when mated with M5 Monitor,

becomes the Evolution T5 tower. It employs the

Evolution 12” aluminum cone woofer. The B5

cabinets are mirror imaged to allow for proper

woofer orientation.

B6 - The B6 subwoofer bass

module mates with the M6 to

form the T6 tower system.

Designed for larger rooms,

the mirror imaged B6 mod-

ules each contain two 12”

aluminum cone woofers.

Pedestals

P5 - The pedestal matched to the

M5. Allows the monitor to be

used free standing with separate

subwoofers or placed as a rear

channel speaker.

P6 - The pedestal matched to

the M6. Allows the monitor to

be used free standing with

separate subwoofers or

placed as a rear channel

speaker.

Electronics

A1 - A full range

(20Hz-20kHz), 250

watt (@ 6ohms), monaural class G amplifier for

use with all Evolution subwoofers and tower

bass modules, or to power an Evolution Monitor.

X1 - A dedicated,

active crossover for

use with all Evolution subwoofer and tower sys-

tems.

K5 / K6 - Parts kit needed to assemble one T5

or T6 tower.

1.3 Identifying Your System

To the right is a chart by model, indicating the

various components and accessory kits includ-

ed with your purchase of either the T5/T6 tower

or U1/U2 subwoofer system. The M5/M6 and

P5/P6 are packaged individually with their

required hardware and accessories.

Towers T6

Towers

Left

Right

Tower

Kit

Tower

Kit

Subwoofer

Cabinet

Subwoofer

Cabinet

Bass

Management/

Active

Crossover

Amplifier

Owners

Kit 1

Subwoofer U2

Subwoofer

Towers

Subwoofer

2.0 Getting Organized.

CAUTION: Some of the

Evolution product is

heavy. We recommend

you enlist help in

unpacking, assembling

and moving the larger

speaker components.

The cartons for all tower speaker components

and assembly kits are color coded. The print on

the 5 series cartons (M5, B5, K5, P5) is red; the

print on the 6 series cartons (M6, B6, K6, P6) is

blue. All other Evolution product cartons use

black print.

2.1 Unpacking

We suggest you use an open area to unpack

and assemble your system, particularly if you

purchased a tower system. Remember, all

Evolution speaker components are finished in

fine lacquer. To avoid damage, assemble the

speakers on a soft surface, e.g. a carpet or blan-

ket.

Take care in unpacking your NHT products to

avoid marring the cabinets. It's best to use grav-

ity to your advantage. Open each carton as

shown, gently turning it upside down and pulling

the carton up and off of the speaker. Remove

the protective end caps, plastic bag and the

micro-foam. Avoid putting your hands directly

on the speaker drivers as they can be damaged

if handled roughly.

Once you have everything unpacked, inspect

and familiarize yourself with the contents. There

is a complete parts list for each product carton in

the next section.

Note: If possible, we recommend that you store

the shipping cartons and packing material in

case the system needs to be moved in the

future.

open flaps

flip over

slip carton

upwards

2.2 Parts List

M5 or M6 Monitor Carton:

M5 or M6 monitor

Grille carton:

Grille

Logo

Third foot

(2) Thumbscrews

(2) Plastic washers

(4) Rubber feet

Warranty card

W1 Carton:

Subwoofer cabinet for the U1 System

(4) Rubber feet

Warranty card

W2 Carton:

Subwoofer cabinet for the U2 System

(4) Rubber feet

Warranty card

X1 Carton:

X1 Active crossover

Power supply

Warranty card

A1 Carton:

A1 Amplifier

Power cord

Dual Subwoofer Adapter

Warranty card

K5 or K6 (tower assembly kit) Carton:

Mounting buttress

Monitor connection harness

(2) Aluminum stabilizer bars (for B5 or B6)

(4) ¼ - 20 spikes with lock nuts

(4) Metal cups

(4) ¼ - 20 machine screws

(7) 10-24 machine screws

(6) Rubber feet

B5 or B6 (left or right) Bass Module Carton:

Tower Base enclosure

Warranty card

P5 or P6 Carton:

P5 or P6 Pedestal

Metal mounting plate

Stabilizer bar carton:

(4) ¼ - 20 spikes with lock nuts

(4) ¼ - 20 machine screws

(5) 10-24 machine screws

(2) Wire channel brackets

(1) Wire channel

(4) 6 - ¾ flathead screws

(2) Aluminum stabilizer bars (for

P5 or P6)

(4) Metal cups

(8) Rubber feet

Warranty card

3.0 Speaker Placement

Now is a good time to finalize your plans for

speaker placement. This section outlines the

important issues to consider in configuring your

system for optimum performance.

The M5 and M6 monitors are designed to per-

form almost identically whether placed horizon-

tally or vertically. Below are some fundamental

guidelines on Monitor orientation:

1) You do not need to “toe-in” the monitors

toward the listening area; position them facing

straight ahead into the room, perpendicular to

the wall in behind the speaker.

2) When oriented vertically, the tweeters

should be placed inward as shown below.

3) When using the M5 or M6 monitor for a

center channel, it should be placed horizontally.

4) When Evolution monitors are placed hor-

izontally in a cabinet, the tweeter orientation (top

or bottom) depends on the placement height. If

the monitor is placed above the listener’s ear,

the tweeter should be below the midrange driver

as shown in the photo. If the monitor is placed

below the listener’s ear, the tweeter should

above the midrange driver.

Once you have determined how you will orient

your monitors, examine the terminal plate on the

back of your Evolution Monitor. You will find a

Boundary Switch on the plate that is used to

adjust the speaker’s response based on its

placement. If you intend to place the monitor in

a cabinet, on a shelf, on top of a television set or

against a wall, move the boundary switch to the

“1” position. If the monitor is two feet or more

from any surface described above, the switch

should be in the “0” position. If the Monitor is

used as part of a T5 or T6 Tower system, the

Boundary Switch should generally be in the “0”

position. If the Tower system is placed very

close to a corner, set the switch to the “1” posi-

tion.

Note: The terminal plate comes from the facto-

ry oriented for horizontal placement. This allows

speaker wire to hang down neatly from the

speaker. The terminal plate should be rotated

for vertical use. Instructions for rotating the cup

can be found in section 4.2.

An explanation of the technology behind the

guidelines described above can be found in sec-

tion 11 of this manual.

3.1 Two Channel Stereo

The diagram below illustrates the desired moni-

tor and subwoofer placement for two channel

(stereo) listening. If you are not using an

Evolution tower or pedestal and are orienting

the monitors vertically, try to place the M5 or M6

so the tweeters are at or near ear level.

3.2 5.1 Digital Surround

The diagrams below illustrate two options for

positioning your speakers in a 5.1 surround sys-

tem. The first option is ideal, assuming you

have sufficient space to place the front and rear

channel speakers equidistant from the listening

position.

If you are primarily listening from a position near

or against a rear wall as shown in the next illus-

tration, you can place the rear channel monitors

to the sides. Surround processors and

receivers have adjustable delay settings that

allow you to equalize the arrival times for the

rear channels. Refer to your Surround

Processor/AV Receiver manual to find the cor-

rect delay setting.

We realize it may be impossible to arrange your

room to accommodate the ideal surround setup.

Because every home is unique, we suggest you

consult your authorized NHT dealer for alterna-

tive placement advice or call our Customer

Hotline at 1-800-NHT-9993 (648-9993).

1.5 D

Front

Left Front

Right

Subwoofer

5.1

Front

Left

Surround

Left

Front

Right

Surround

Right

Center Channel

Subwoofer

3.3 Enhanced Digital Surround Formats

Different surround formats use different num-

bers of surround speakers. 5.1 systems use two

surround speakers, 6.1 systems use three and

7.1 systems use four. Some AV receivers and

separate Surround Processors are equipped

with 6.1 or 7.1 surround formats. 6.1 refers to

the Dolby Digital Surround EX ™ or DTS

Surround ES ™ standard. The diagrams below

illustrate the suggested positions for 6.1 and 7.1

systems.

Note: Pay attention to the orientation of the

monitors (horizontal or vertical) and tweeters

(top/bottom or inside/outside) in your installation

for correct system performance.

Be aware that there are other surround formats

that are not covered in this setup guide. Consult

your authorized NHT dealer if you are unsure

about your particular system configuration.

6.1

Front

Left

Surround

Left

Front

Right

Surround

Right

Surround

Center

Center Channel

Subwoofer

7.1

Front

Left

Surround

Back

Left

Surround

Left Surround

Right

Front

Right

Surround

Back

Right

Center Channel

Subwoofer

3.4 Center Channel

The M5 and M6 monitors can be placed in a

home entertainment center or directly on top of

a TV as shown below. Remember, for proper

center channel sound dispersion, the Monitor

should be placed horizontally.

If you intend to place your center channel on a

television with a shallow top so that the Monitor

overhangs the television as illustrated below,

you will need to attach the included Third Foot

for proper support (see Section 4.2 for detailed

instructions).

3.5 Subwoofers

Subwoofers produce low frequencies that have

long wavelengths. These wavelengths are sim-

ilar to the dimensions of the room, so the sound

energy strongly interacts with the room bound-

aries. Fortunately, Evolution’s flexible sub-

woofer options, combined with the X1 active

crossover, solve most of the acoustic problems

caused by room interaction with bass frequen-

cies. Experimenting with subwoofer location is

the key to finding the best performance in your

listening environment. Position a subwoofer

cabinet so that its driver(s) are not directly

against a wall or piece of furniture. If you are

using two subwoofers, some improvement in

low frequency response can be achieved by

placing the second subwoofer asymmetrically in

the room.

Note: Because of the massive motor structure

used in the Evolution subwoofer driver, it is not

possible to magnetically shield it. Make sure

you place the subwoofer at least 18” from any

television to avoid discoloration.

Television

Third Foot

Boundary Switch

Set to the '1' position

W2W2

Evolution freestanding subwoofers offer tremen-

dous flexibility in placement. The following sug-

gestions illustrate a few of the possibilities avail-

able to you. If you have a unique placement

requirement or intend to use multiple subwoofer

systems, consult your authorized NHT dealer or

call our Customer Service Hotline at 1-800-

NHT-9993 for advice.

U1 Subwoofer System: The U1 subwoofer

enclosure is a dual, side-firing design. If the U1

is going to be located in a corner or against a

wall, we recommend that you keep the face with

the grille at least 4” from any boundary to obtain

optimum performance.

U2 Subwoofer System: The compact, front-fir-

ing, dual cabinets in the U2 system can be con-

veniently placed near corners , or placed in cab-

inets as illustrated below.

3.6 Electronics

Evolution electronics should be placed with the

rest of your electronic components. Both the A1

amplifier and the X1 Active Crossover can be

rack mounted if desired. Instructions for rack

mounting can be found in section 9.3 of this

manual.

>4"

4.0 System Assembly

This section covers the assembly required for

specific Evolution product configurations. The

operations are simple and easy to accomplish

quickly.

4.1 Supplies and tools

The tools you will need are:

- Combination #2/#3 Phillips screwdriver (pro-

vided in your Owner’s Kit)

- NHT binding post wrench (provided)

- Wire strippers

- Speaker wire (10 to 14 gauge)

- Tape measure or ruler

CAUTION: Some of the Evolution components

are heavy. If possible, have someone available

to assist you during assembly and placement of

the tower and/or subwoofer modules.

4.2 Monitor Parts Assembly

Step 1: Terminal Plate Orientation

The M5 and M6 are delivered with the Terminal

Plate oriented for horizontal monitor placement.

For vertical monitor placement, the Terminals

should be rotated so that the speaker wire

hangs straight down the rear of the speaker.

Place the monitor on a soft surface in the

desired orientation. See section 3.0 for illustra-

tion of proper tweeter orientation. DO NOT lay

the front baffle of the Monitor down on any sur-

face, as this will damage the drivers.

Remove the four screws from the Terminal Plate

on the back of the Monitor with the supplied #2

screwdriver. Gently pull the Terminal Plate

away from the cabinet and rotate it 90 degrees

so that the Boundary Switch is at the top.

Reinstall the screws in the pilot holes as shown.

Make sure the screws are snug, but be careful

not to over tighten them.

Remove Screws

Rotate Terminal Plate

Reinstall Screws

Step 2: NHT Third Foot for Center Channel Use

The M5 and M6 cartons include a “Third Foot”,

a support that stabilizes the monitor when it is

mounted on a television. If the top of the televi-

sion is shallower than the Monitor is deep, the

rear of the Monitor will not be fully supported.

The Third Foot will provide the necessary sup-

port in this case. The Third Foot can also be

used to aim the Monitor down towards the lis-

tening area if the television is significantly above

eye level.

There are two parts supplied with the Third Foot

for assembly: (2) plastic washers and (2) thumb-

screws. The plastic washers go between the

Third Foot and the cabinet to protect the cabi-

net’s lacquer finish. Assemble these parts as

shown and screw the two thumbscrews partially

into the two threaded holes next to the terminal

plate.

Attach the two rubber feet about an inch from

the bottom front edge of the monitor. Set the

monitor on the television and adjust the length of

the third foot so that it rests on the TV set as

shown. Hand tighten the thumbscrews.

Step 3: Logo Placement

The M5 and M6 are supplied with a metal NHT

logo that can be attached to the grilles when the

speakers are placed in the vertical position only.

The logo should be attached at the bottom of the

grille. To attach the logo, hold the grille up to a

light to locate the two holes in the frame through

the cloth. Line up the two posts on the back of

the logo with the holes and press the logo firmly

through the cloth and into the grille frame until it

is fully seated against the grille.

Note: The logo badge is not attachable when

the speaker is placed horizontally.

Television

Step5: Attaching Monitor Grilles

The M5 and M6 are designed to sound the best

when the grilles are used (they may sound

slightly bright if played without the grilles). To

install them, line up the four pins on the back of

the grille with the four rubber cups located in the

corners of the Monitor’s front baffle. Firmly press

all four corners of the grille until the pins seat

against the rubber cups.

Note: The M5 and M6 grilles are intentionally

curved. The grille curve is a design element that

completes a larger curve when a Monitor is

attached to a B5/B6 subwoofer module or either

pedestal stand. The curve is shallow enough

that it may go unnoticed when the monitors are

placed on shelves. The illustration to the right

shows how an Evolution tower looks when the

grille is installed.

4.3 T5 and T6 Tower Assembly

Depending on which model you purchased, you

will now need the parts contained in either the

K5 or K6 assembly kit.

Step 1: Installing the Stabilizer Bars

The aluminum bars attach to the bottom of the

bass module to provide stability for the tower

system. Carefully turn the B5 or B6 bass mod-

ule upside down on a soft surface. There are

four threaded holes on the bottom of the cabi-

net. Gently place the stabilizer bars over the

threaded holes. Start the four large (1/4-20)

screws by hand. Once all the bolts are started,

tighten them with the supplied #3 Phillips screw-

driver.

Note: If you intend to use spikes with the stabi-

lizers, do not install them at this time. The tow-

ers are difficult to move once the spikes are in

place. Spike installation is covered in Step 9.

Step 2: Adhering the Rubber Feet

Once the stabilizers are mounted, carefully turn

the bass module upright. Peel the paper cover

off the back of the two round rubber feet and

attach them to the top front of the B5 or B6.

There are slight indentations on the cabinet to

help you position the rubber feet properly.

Step 3: Attaching the Monitor Connection

Harness

The Monitor Connection Harness connects the

Monitor’s speaker terminals to the terminal cup

on top of the subwoofer module. This terminal

cup is internally wired to the uppermost of the

two terminal cups at the bottom rear of the sub-

woofer module. Remove the two gold-plated

screws from the terminal cup on the top of the

B5 or B6 with the #2 screwdriver. Insert the ring

terminal ends of the cable onto the screws and

fasten them into the terminal cup. Check that

the wire is oriented vertically and that you have

connected the red ring terminal to the bass mod-

ule terminal marked in red (and the black ring

terminal to the bass module terminal marked

with black).

Step 4: Installing the Mounting Buttress

The mounting buttress secures the monitor to

the bass module. Place the buttress over the

four threaded holes on the top of the bass mod-

ule. Start four of the smaller screws (10-24) with

the #2 screwdriver. Center the buttress by mea-

suring the distance between the base of the but-

tress and the speakers’ edge in a few places as

illustrated. Once you have checked alignment

you may tighten the screws, making sure they

are snug, but do not over tighten them.

Step 5: Route Monitor Connection Harness

Route the harness through the channel inside

the buttress as shown below.

Step 6: Bass Module Orientation

At this point you need to decide in which orien-

tation to place the subwoofers. There are two

options, woofers facing inwards or outwards as

shown in the illustration.

If there is going to be a large object located

between the towers (a television or large piece

of furniture), place the subwoofer modules so

that the woofers face to the outside (away from

the television). If there are no large objects

between the towers, orient the subwoofers so

that the woofers face to the inside (towards each

other). Remember that the subwoofer modules

should be at least 18” from the sides of a televi-

sion to prevent discoloration of the screen.

Step 7: Mounting a Monitor to the Bass Module

Place the monitor on the buttress as shown.

The front of the monitor should be resting on the

round rubber feet. Line up the threaded holes in

the back of the monitor with the holes in the but-

tress. Fasten the monitor to the buttress with

three small (10-24) screws using the #2 screw-

driver. Start the center screw first, and then start

the outer screws. Make sure that the Monitor

Connection Harness extends from the top of the

buttress as illustrated below.

Step 8: Connecting the Monitor Connection

Harness to the Monitor

Loosen the nuts on the binding post terminals

enough to allow the spade terminals on the

Harness to fit under them. Make sure you

match wire colors for proper polarity, (red to red,

black to black). The cable should lay flat against

the back of the monitor. Tighten the terminal

nuts using the NHT wrench.

Step 9: Install spikes (optional)

Spikes couple the speaker to the floor, improv-

ing the performance of the system.

Note: Position the speakers in their permanent

location before installing the spikes. It is very dif-

ficult to move the

assembled speakers

once the spikes are in

place. We suggest

two people for this

operation, one to hold

the speaker and the

other to install and

adjust the spikes.

Install the locking nuts

on the threaded

spikes and screw

them all the way down

the shaft until they

stop. Carefully tilt the tower speaker to one side

and screw the metal spikes into the bottom of

the front and rear aluminum stabilizer bars (at

least 3/8”) to the desired height. Hand tighten

the nut to lock it in position. When both sides

are installed, check to ensure that the speaker

does not rock. If necessary, tilt the speaker,

loosen the nut and adjust the height until the

speaker rests firmly on all four spikes. You can

use a small wrench to further tighten the nuts.

Be aware that wood or tile floors can be dam-

aged by the spike’s sharp tip. Four small metal

cups are included with the tower assembly kit to

fit under each spike and protect your floors.

Once the spikes have been mounted to the sta-

bilizer bar, slip a cup under each spike as you

gently lower the tower to the floor.

4.4 Assembling Monitors On Pedestals

Step 1: Install Aluminum Stabilizer Bars

Carefully turn the P5 or P6 bass module upside

down on a soft surface, being careful not to

scratch the paint. Find the four threaded holes

on the bottom of the pedestal. Gently place the

stabilizer bars over the threaded holes. Start the

four large (1/4-20) screws by hand. Once they

have been started, tighten them with the #3

Phillips screwdriver.

Step 2: Attaching Rubber Feet

Attach the four round rubber feet to the top of

the pedestal. Peel the paper backer from each

foot, and press them into the shallow indenta-

tions on the cabinet surface.

Step 3: Install Metal Mounting Plate

Begin by attaching the metal mounting plate to

the pedestal base with two of the small (10-24)

screws and the #2 Phillips screwdriver. Note

that the notch in the metal plate should be fac-

ing downwards. Do not tighten them all the way

until the monitor is in position.

Gently place the Monitor on the pedestal top

with its back against the mounting plate. Make

sure that you have determined the proper tweet-

er orientation (see Section 3). Start the three

small screws (10-24) through the mounting plate

and into the threaded holes in the back of the

Monitor. Tighten all five screws until snug.

Gently place the monitor on the pedestal top

with back against the mounting plate. Make

sure that you have the proper tweeter orienta-

tion (see Section 3). Start 3 smaller bolts (10-

24) through the mounting plate and into the

threaded holes in the back of the monitor.

Tighten all five bolts until snug.

Step 4: Install Wire Channel Assembly

The wire channel assembly for the P5 and P6

pedestals neatly routes the speaker wire down

the back of the pedestal. It consists of two plas-

tic U shaped brackets, one plastic channel and

four 6-3/4 screws.

To install, first strip ½” -

¾” of insulation from

the ends of your speak-

er wire and connect

them to the monitor’s

binding post by loosen-

ing the binding post

nuts and slipping the

wire into the hole

behind each nut.

Tighten the nuts with

your NHT wrench.

Remember to check for

the correct polarity (see

section 5.3 and 5.3).

Slip the channel over the speaker wire. The

brackets are recessed on one side to accept the

ends of the wire channel. These recesses

should face each other when the channel is

installed. There are small pilot holes in the rear

of the pedestal to accept the 6-3/4 bracket

screws. Fasten the channel to the pedestal with

the brackets and the four screws as shown.

Step 5: Install Spikes (optional)

Spikes provide additional stability when the

pedestal is placed on thick carpet or on an

uneven surface. Position the speakers in or

close to their permanent location before

installing the spikes. It is difficult to move the

speakers once the spikes are in place.

Install the locking

nuts on the

threaded spikes

and screw them

all the way down

the shaft until

they stop. Attach

the spikes on

one side of the

pedestal at a

time. Tilt the

pedestal as

shown in the

photograph and

Channel

Bracket Recess

screw the metal spikes into the bottom of the

aluminum stabilizer bars. Tighten the locking

nuts by hand. Move to the other side and repeat

the procedure.

Be aware that wood or tile floors can be dam-

aged by the spike’s sharp tip. Four small metal

cups are included with the pedestal to fit under

each spike and protect the floor. Once the

spikes have been mounted to the stabilizer bar,

slip a cup under each spike as you gently lower

the tower to the floor.

5.0 Wiring Your Speakers

Before beginning to wire

your system, we suggest

you review the following

guidelines and wiring dia-

grams to find the Evolution

system(s) you have pur-

chased.

Tools Required:

NHT Wrench (included)

Wire strippers

Tape measure

Speaker Wire (10 - 14 gauge)

Component Interconnect Cables

5.1 General Guides to Wire Layout

To minimize noise problems, try to segregate

cables by function, and separate them by the

maximum practical distance. Where audio and

video cables intersect, cross them at right

angles. Try not to twist or tie AC power cords

and speaker cables together.

The minimum size speaker cable recommended

for runs of 20 feet or less is 14awg. Heavier spe-

cial purpose cable can be used for longer runs.

For best results, use equal length runs of cable

for the left and right speakers (or for the left,

center and right speakers).

5.2 Speaker Phase

For proper response, the speakers must be

wired in-phase with each other. That is, the Red

(+) terminal on the amplifier speaker output

must be connected to the corresponding Red (+)

terminal on the speaker. The same is true of the

Black (-) terminals. All speaker cable or wire

has a marking along one or both conductors to

help you make the correct connections. Weak

bass and the lack of a well-defined image are

indications that speakers are wired out of

phase. A well-defined image is one in which

you can easily locate the positions of perform-

ers in the sound field.

5.3 Connecting Speaker Wire

The gold plated binding posts on all Evolution

speakers will accept raw wire or virtually any

type of special purpose terminal. If you plan to

use raw wire, strip 1/2" to 3/4" of insulation from

the ends, twisting the exposed wire strands

tightly. Remove the binding post nuts on the ter-

minal and slip the wire through the hole in the

binding post. Replace the nuts on the binding

post and tighten until snug with the NHT wrench.

5.4 T5 and T6 Tower Wiring

You will be running 2 pairs of speaker wires to

either Evolution tower model. The M5 and M6

are wired through the B5 or B6 cabinet to keep

the speaker cables near the floor and to reduce

their visibility. There are two Terminal Plates on

the backside of the B5 and B6. The top terminal

plate connects an M5 or M6 to your AV Receiver

or amplifier. The bottom terminal plate connects

a B5 or B6 to an A1 subwoofer amplifier.

5.5 Wiring for Monaural Bass

The B5 bass modules and the dual W2 sub-

woofer cabinets require one additional wiring

step. The speaker wire coming from the B5 or

W2 cabinets must be connected in parallel at

the A1 subwoofer amplifier. The Dual

Subwoofer Adapter has been supplied with the

A1 amplifier for this purpose (see illustration).

Loosely twist the "+" wires from each subwoofer

(or tower base) together, then repeat for the "-"

wires. Loosen the red and black thumbscrews

on the Adapter until the hole in the shaft is fully

revealed. Insert the twisted pair of "+" speaker

wire to the hole marked with red. Tighten until

the wire is securely clamped. Repeat the proce-

dure for the "-" speaker wire and black thumb-

screw. The Adapter can now be inserted into

the A1 amplifier’s “speaker out” terminal posts.

5.6 System Wiring Diagrams

The following pages contain diagrams illustrat-

ing proper wiring for each Evolution model:

Monitor Wiring Diagram

U1 Wiring Diagram

U2 Wiring Diagram

T5 Wiring Diagram

T6 Wiring Diagram

M5/M6

M5 / M6

Wiring Diagram

W1 Cabinet

From X1

U1 Wiring

Diagram

W2 Cabinet W2 Cabinet

Use Banana Adapter

From X1

U2 Wiring

Diagram

Speaker Output

Left

Speaker Output

Right

To M6 To M6

Sub Sub

T6 Tower Left T6 Tower Right

Right Amp

Left Amp

AV Receiver

or Amplifier

From X1

T6 Wiring

Diagram

6.0 Connecting Evolution Electronics to Your

System.

There are a number of methods by which you

can connect the X1 Active Crossover and A1

Amplifier to the rest of your system. The method

you choose will be determined largely by the

surround components in your system. This

becomes particularly important in the manage-

ment of bass frequencies. The Evolution elec-

tronics were designed with flexibility and com-

patibility in mind.

The following section will take you through the

steps in making the final connections in your

system. If for some reason the methods

described in this Owner’s Manual don’t work

properly in your system, consult your NHT deal-

er or call us at 1-800-NHT-9993 (648-9993)

6.1 Signal Connections

Review the following connection method

descriptions and use the one that describes

your surround receiver or processor:

Method 1 - Use if there is a Subwoofer Output

(sometimes labeled “LFE”) on your AV Receiver.

Method 2 - Use if there is a pre-amp out/main in

section on your AV Receiver.

Method 3 - Use this method if have a separate

Surround Processor and Amplifier(s).

Method 1

Integrating the X1 into your surround system is

simple and straightforward when using this con-

nection method. Your AV Receiver will control

all crossover functions and the X1 will control

gain, phase and boundary equalization (see 8.3

below).

Connect the Subwoofer/LFE Output on your AV

Receiver to the LFE IN on the X1 active

crossover.

Method 1 - Recommended Surround Settings

We recommend setting the speaker size in your

processor or receiver to “small” when using

either the M5 or M6 monitors. The “small” set-

LFE/

Subwoofer

AV Receiver

To Power amp

Method 1

ting will prevent low bass frequencies from

reaching the Monitors. The removal of the low

bass will make integration of the Monitors with

your Evolution subwoofer easier and has the

additional benefit of increasing the Monitor’s

dynamic range and power handling capability.

Method 2

This is the connection method to use if your AV

Receiver has a pre-amp out/main in section.

This connection method is preferred over

Method 1.

- Remove the jumper connections

between the pre-amp L/R front outputs and the

main L/R inputs.

- Connect the Left and Right pre-amp out-

puts from your AV Receiver to the Left and Right

inputs on the X1.

- Connect the Left and Right Hi Pass out-

puts from the X1 to the Left and Right main

inputs on your AV Receiver.

- Connect a single cable from the

Subwoofer/LFE output on the AV Receiver to

the LFE input on the X1.

- Finally, using another single cable, con-

nect one of the Sub outputs on the X1 to the

input on the A-1. Set the mode switch on the X1

to Mono.

Note: If you are using two A1 amplifiers for

stereo bass, as with the T6 tower system, set

the mode switch on the X1 to Stereo and use the

remaining Sub output on the X1 and connect to

the input on the second A1 . Make sure the left

and right channels are wired correctly.

Method 2 - Recommended Surround Settings

Set your Left and Right front speakers to “large”

in your AV receiver. Set all other speakers that

are not capable of producing low bass frequen-

cies to “small”. The “large” setting will send a full

range signal to the X1. The Hi Pass and Lo

Pass controls on the X1 crossover will then be

used to set the crossover frequencies for the

front L and R monitors and the subwoofer (see

section 7). The Subwoofer(s) receive bass

information from the front Left and Right chan-

nels and the Subwoofer/LFE output (see section

8.3).

Pre Out Main In

LFE/

Subwoofer

AV Receiver

To Power amp

Method 2

Method 3

Use this connection method if you have a sepa-

rate Surround Processor and Amplifier(s).

- Connect the front Left and Right pre-amp

outputs from your Surround Processor to the

Left and Right inputs on the X1.

- Connect the Left and Right Hi Pass out-

puts on the X1 to inputs of the amplifier that is

driving the front Left and front Right speakers.

- Using a single cable, connect the

Subwoofer/LFE output from the Surround

Processor to the LFE input on the X1.

Method 3 - Recommended Surround Settings

Set your Left and Right front speakers to “large”

on your AV receiver. Set all other speakers that

are not capable of producing low bass frequen-

cies to “small”. The “large” setting will send a full

range signal to the X1. You will then use the Hi

Pass and Lo Pass controls on the X1 to set the

crossover points for the front monitors and the

subwoofer (see section 7). The Subwoofer

receives bass information from the front Left and

Right channels and the Subwoofer/LFE output

(see section 8.3).

Note when using methods #2 and #3: Some

Surround Processors and AV Receivers offer an

additional LFE/Subwoofer setting, often referred

to as “Extended Bass” or “Reinforced Bass”. If

your equipment offers this option we strongly

recommend that you do not select it. The X1

processor will automatically sum the LFE chan-

nel with the left and right subwoofer information.

Pre Out

LFE/

Subwoofer

AV Surround Processor

To Power amp

Method 3

6.2 Power Connections

The X1 crossover receives power via the LL-1

power supply.

The A1 amplifier receives power via the detach-

able IEC style power cord.

Caution: Prior to connecting the A1

amplifier to your audio system, make

sure that all your other electronic

equipment is turned off or unplugged.

7.0 Basic Settings for the X1 Active

Crossover

The following diagrams will provide starting

points for each control feature on the X1. The

diagrams are organized by Evolution model.

Begin with these basic settings and then move

to Section 8 which describes each X1 control

function in detail and provides advice for fine

tuning the X1 to your listening room.

Note: If you are using main speakers other than

Evolution, use the initial settings described for

the U1 or U2 subwoofer.

M5 or M6

Not used in Method #1

One W1 = Mono

Two W1 = Stereo

Boundary EQ LFE Gain

Master Gain

Min

-6

-3 +3

Max

090

180

Phase

Low Pass

140

110

Degrees dB

LFE LFE In High Pass

Out L High Pass

Out R

Hi Pass

Out Sub

Out

Gain High Pass Filter

Out

110Hz

Stereo

10 dB 80Hz 50Hz

Mono

0dB

Not used in Method #1

M5 or M6

Not used in Method #1

Boundary EQ LFE Gain

Master Gain

Min

-6

-3 +3

Max

090

180

Phase

Low Pass

140

110

Degrees dB

LFE LFE In High Pass

Out L High Pass

Out R

Hi Pass

Out Sub

Out

Gain High Pass Filter

Out

110Hz

Stereo

10 dB 80Hz 50Hz

Mono

0dB

Boundary EQ LFE Gain

Master Gain

Min

-6

-3 +3

Max

090

180

Phase

Low Pass

140

110

Degrees dB

Boundary EQ LFE Gain

Master Gain

Min

-6

-3 +3

Max

090

180

Phase

Low Pass

140

110

Degrees dB

LFE LFE In High Pass

Out L High Pass

Out R

Hi Pass

Out Sub

Out

Gain High Pass Filter

Out

110Hz

Stereo

10 dB 80Hz 50Hz

Mono

0dB

Not used in Method #1

8.0 X1 Active Crossover

8.1 Design

The NHT X1 active crossover is designed to

provide convenient front-panel adjustment of the

controls necessary to integrate the Evolution

subwoofers with Evolution Monitors or other

satellites. It also provides unbalanced RCA and

differential balanced XLR inputs and outputs for

connection with all types of receivers or sepa-

rate audio components.

NOTE: The X1 contains special equalization

circuitry specifically designed for Evolution sub-

woofers and tower bass modules only. Do not

use with non-Evolution subwoofers.

The X1 Active Crossover can operate as either

a mono (single channel) or stereo unit. In the

stereo mode, you may add an additional sub-

woofer without purchasing an additional

crossover. Two subwoofers can be used for

stereo bass (which is desirable for music repro-

duction) or for additional mono bass reinforce-

ment (for movie soundtracks).

Note: Do not use both the unbalanced (RCA)

and balanced (XLR) inputs at the same time.

The unbalanced (RCA) and balanced (XLR) out-

puts are buffered separately and may be used

simultaneously.

8.2 Placement

The X1 Crossover may be used on a shelf, or in

a standard 19" equipment rack using the option-

al rack ears and hardware. See section 10.3 for

instructions on rack mounting.

Ideally, the X1 should be placed in close prox-

imity to the receiver or surround processor.

Minimizing cable lengths reduces the chance of

noise contamination. If long runs (more than 20

feet) of signal cables are required, we recom-

mend using the balanced (XLR) inputs and out-

puts on the crossover.

If you are using the X1 in combination with the

Evolution A1 amplifier, we recommend that you

place the X1 underneath the A1 amplifier. Or, in

a stereo configuration, place the X1 between

two A1 amplifiers. The A1's are equipped with

lamps under the front edge, which illuminate the

X1 controls. See section 9.2 for more detail.

8.3 X1 Features and Controls

This section describes the various controls and

functions of the X1. Make sure that your X1 con-

trols initially are set as described in Section 7 for

your Evolution model before continuing.

Power/Standby Mode (Rear Panel)

Your X1 crossover does not have a power

switch but has been designed with the ability to

turn on and off under various conditions. There

are three methods for activating the X1.

Once the X1 is

plugged into the

wall outlet it is on -

- there is no main

power switch.

The X1 has a

standby mode

that can be trig-

gered internally or externally. On the rear panel

of the X1 is a 3-position switch that determines

the trigger mode:

1) On; the X1 is always on.

2) Audio; the X1 will automatically turn on

when it detects an audio signal and turn off after

20 minutes with no signal.

3) 12V Ext; the X1 can be remotely turned

on or off when it detects a DC control signal from

another component in your system. The exter-

nal trigger will accept 5 - 24 volt (DC) signals.

For more information regarding external trig-

gers, consult your authorized dealer.

Master Gain (Front Panel)

The Master Gain control allows

you to adjust the volume of the

subwoofer relative to the moni-

tors. Use the Master Gain judi-

ciously. A properly calibrated

subwoofer blends seamlessly

with the Monitors or satellites without calling

attention to itself. Here are some general guide-

lines for setting the Master Gain control:

Begin by playing some stereo music you are

familiar with. Set your AV Receiver or Surround

Processor volume to a comfortable listening

level. Slowly increase or decrease the Master

Gain on the X1 crossover, listening for a natural

frequency balance between the subwoofer (or

tower bass module) and the front left and right

monitors. When properly balanced, you will

hear natural bass extension, without being

aware that it is coming directly from the sub-

woofer.

Once the Master Gain is set, the volume control

on your AV Receiver or Surround Processor will

control the volume of your entire system, includ-

ing the subwoofer.

LFE Gain Control (Front Panel)

LFE is short for ‘Low Frequency

Effects’. Low Frequency Effects

originally were low frequency

sounds added to movie sound-

tracks in order to increase their impact. For con-

sumer electronics, there is no standard con-

cerning what type of signal might be present on

the LFE channel. Therefore, we have added an

LFE input and gain control to the X1 so that you

can integrate whatever is present on the LFE

channel with the signal being reproduced by the

rest of the system.

After you have set the Master Gain level as

described above, play a multi-channel signal

through your system (as from a movie).

Sources with lots of bass output will be the most

useful. Adjust the LFE gain control until the

bass produced by the subwoofer reaches the

desired level. Most users initially set the level of

the LFE gain control at too high a level, so be

prepared to adjust the control over a long period

of time. You have reached an appropriate level

setting when movies soundtracks have impact

and music sources have punchy bass, but the

overall character of the bass produced by the

subwoofer is not thick and ill defined.

The level of the signal on the LFE channel

varies considerably from source to source, so

you may need to use the LFE level trim featured

in most receivers and processors to adjust the

LFE level on a source-by-source basis.

There is an LFE “Thru” output on the back of the

X1. For more information concerning the use of

this output, visit our website,

www.nhthifi.com/technicalhelp/evolution .

High Pass Filter Switch (Rear

Panel) - Connection Method 2

and 3 Only

Note: If you are using Connection Method #1,

the X1 High Pass Filter is not in the circuit path.

Your monitors will reproduce the frequency

range selected by your AV Receiver.

The High Pass Filter determines the range of

frequencies that the main speakers ("satellites")

will reproduce. For example, a high pass setting

of 80Hz means that the main speakers receive

a signal containing only frequencies above

80Hz. The 3-positon High Pass Filter is selec-

table between 50Hz, 80Hz, and 110Hz to

accommodate a variety of speaker sizes.

If you are using Evolution monitors, the setting

for this control shown is Section 7 should be suf-

ficient. If using speakers other than Evolution

monitors and Connection Methods 2 or 3, use

the guidelines below.

Set the High Pass Filter to a frequency above

the rated low frequency limit of the main speak-

ers. For example, if your speakers have a rated

low frequency response of 40Hz, use the 50Hz

high-pass setting. If your speakers have a rated

low frequency response of 90Hz, use the 110Hz

high-pass setting. Check the owner's manual

for their rated low frequency response.

Low Pass Filter Control (Front Panel) -

Connection Methods 2 and 3 Only

The continuously variable Low

Pass Filter determines the range of

frequencies produced by the sub-

woofer. For example, a low pass

setting of 100Hz means that the

subwoofer reproduces only frequencies below

100Hz. The LFE input is not affected by this

control.

Adjust the Low Pass Filter to approximately the

same setting as the High Pass Filter as a start-

ing point. Adjust the Low Pass Filter in small

increments up or down until the blend between

the Evolution Subwoofer and your main speak-

ers is seamless and the subwoofer does not call

attention to itself. Music featuring male vocals,

cello and acoustic bass, bass guitar and certain

wind instruments (like saxophone and trom-

bone) is useful for setting the low pass frequen-

cy.

Phase Controls (Front Panel)

The Subwoofer Phase switch

and continuously variable knob

set the phase of the subwoofer

output anywhere from 0° to

270° relative to the high pass

output. Proper subwoofer phase is important in

achieving smooth bass response. An improper

phase setting can cause large peaks and dips in

the frequency response of the combined sub-

woofer/satellite system at the listening position.

The result of the peaks and dips is low frequen-

cy production that is very pronounced at certain

frequencies and a lack of seamless integration

between the satellites and subwoofer.

The optimal phase setting will differ according to

room conditions and placement. While fine tun-

ing phase settings, have a familiar stereo CD

available. You should listen to the same song

while alternating phase settings. Find the best

setting while sitting at the primary listening posi-

tion.

The initial settings described in Section 7 should

be an adequate starting place for your Evolution

system. However, if you want to experiment or

are using main speakers other than Evolution

Monitors, use the following procedure: Begin by

setting the phase knob at 0°, alternating the

switch position between 0° and 180°. From the

listening position, choose the switch position

that yields the most bass output and leave the

switch there. Then use the knob to fine-tune the

phase setting. Slowly twist the knob, listening for

the point at which the bass at the listening posi-

tion is the loudest. Small changes in phase gen-

erally produce subtle changes in bass output.

You may have to adjust the knob now and again

over a period of a few weeks to find the best set-

ting for your listening room.

Gain Switch (Rear Panel)

The Subwoofer Gain switch allows you to

increase the gain of the X1 subwoofer output by

10dB. Normally, the factory default "0" position

will give you a wide range of volume adjustment.

However, if the sensitivity of your satellite

speakers is greater than 93dB, your range of

volume adjustment on the X1 may be limited. In

this case, set the Gain Switch to 10dB.

Boundary EQ (Front Panel)

The Boundary EQ is a feature unique to NHT

Evolution products. Reflective boundaries (such

as walls) reinforce a speaker’s bass output (3dB

for two walls, 6dB for a corner) if the subwoofer

is placed near them. Conversely, placing a sub-

woofer out in the room results in a relative

decrease of bass output. Boundary reinforce-

ment may lead to low frequency response that is

uneven. Some frequencies will sound exagger-

ated relative to others, or the subwoofer will

sound thin and lack impact. The Boundary EQ

control allows you to compensate for the effects

of room boundaries on the frequency response

of the subwoofer. Adjusting the control enables

you to achieve smooth low frequency output

from the subwoofer regardless of its location in

your room.

The following diagrams show the correlation

between subwoofer placement and Boundary

EQ. These diagrams are guidelines only. Your

room acoustics and personal tastes will ulti-

mately dictate the final setting.

Quarter

Space

Quarter/

Half

Space

Half/

Whole

Space

Half

Space

Whole

Space

8.4 System Status Indicators

(Front Panel)

Located on the right hand side of the front panel

are two LEDs. They are used to indicate the

functional status of the X1 Crossover.

P - Power LED (green) - indicates the X1 is on

and in a ready condition.

S - Standby LED (amber) - indicates the X1

crossover is in "standby" mode.

8.5 Fine Tuning Chart

The chart below was developed to assist you in

the further fine tuning of your subwoofer or

tower system. Should you be unable to achieve

satisfactory performance from your Evolution

subwoofer system using the fine-tuning chart,

contact your authorized NHT dealer or call our

Customer Hotline at 1-800-NHT-9993 (648-

9993).

"Boomy"

Too Much

Mid / Upper

Bass

Problem

Solution

Lacks

Low

Bass

Weight

Excessive

Low

Bass

Weight

Lacks

Mid / Upper Bass:

Lean But With

Weight

Fine Tuning Flow Chart

Lower

Low Pass

X-Over

Frequency

Increase

Boundary

Decrease

Boundary

Adjust

Subwoofer

Volume

Listen

If this makes

it worse,

try

If the sound

improves

Raise

Low-Pass

Setting

Adjust

Subwoofer

Volume

Adjust

Subwoofer

Phase

Listen

Lower

Subwoofer

Volume

Move

Subwoofer

Closer to

Wall

Move

Subwoofer

Farther

From Wall

Adjust

Subwoofer

Phase

0-90

(Continuously

Add)

Adjust

Subwoofer

Phase

0-90

(Continuously

Add)

Adjust

Subwoofer

Phase

Switch

0-180

Listen Listen

Listen

9.0 A1 Monaural Amplifier

9.1 Design

The A1 is a full range (20Hz - 20kHz) audio

power amplifier. It provides RCA and XLR

inputs for connection with all types of receivers

or separate audio components. The A1 is a sin-

gle channel or monaural amplifier and can be

used with Evolution subwoofer and tower prod-

ucts or to power individual Evolution monitors.

The A1 is a Class G design, which operates at

lower temperatures than other amplifier classes

and is typically more efficient. The A1 offers the

wide dynamic range and low distortion typical of

more conventional class AB designs.

9.2 Placement

The A1 amplifier may be placed on a shelf, or in

a standard 19" equipment rack using the option-

al rack ears and hardware. See instructions on

rack mounting below.

Ideally, the A1 should be placed in close prox-

imity to the receiver or surround processor.

Minimizing cable lengths reduces the chance of

noise contamination. If long runs (more than

20’) of signal cable are required we recommend

using the balanced (XLR) input on the amplifier.

9.3 Rack Mounting the A1 and or X1

You may need assistance to hold the A1 or X1

in place while mounting them to the rack.

Note: When rack mounting, we recommend you

leave at least one rack space between compo-

nents (particularly amplifiers) for proper cooling.

Step One: Remove the

two screws on each

side of the X1 or A1 with

the #2 Phillips screw-

driver.

Step Two: Position

the rack ears over

the threaded holes.

Replace the two

screws and tighten

both securely.

Step Three: Arrange the

mounting screws included

with the rack ears and the

plastic insulating washers

as shown.

Step Four: Start all four

bolts, then tighten secure-

ly.

9.4 Power/Standby Mode

The main power switch for the A1 is located on

the rear panel and does not normally need to be

used. The A1 has a standby mode that can be

triggered internally or externally. On the rear

panel of the A1 is a 3-position switch that deter-

mines the trigger mode:

1) On: The A1 is always on.

2) Audio: The A1 will automatically turn on

when it detects an audio signal and turn off after

20 minutes with no signal.

3) 12V Ext: The A1 can be remotely turned

on or off when it detects a DC control signal from

another component in your system. The exter-

nal trigger will accept 5 - 24 volt (DC) signals.

For more information regarding external trig-

gers, consult your authorized dealer.

9.5 A1 Courtesy Lights

The A1 amplifier is equipped with courtesy lights

to illuminate the controls of the X1. This feature

is controlled by a 3-position switch for HI, LO

and OFF that can be accessed from the bottom

of the amplifier just behind the center of the front

panel. The A1 courtesy lights are set in the HI

position at the factory.

To adjust intensity or turn off the lights, unplug

the A1 from the wall. Use a small flat blade

screwdriver and move the switch according to

the desired position using the diagram. The

courtesy lights will shutoff automatically when

the amplifier is in “standby” mode.

High Low Off

9.6 System Status Indicators

Located on the right hand side of the front panel

are three LEDs. They are used to indicate the

status of the A1 amplifier.

P - Power LED (green) - indicates the A1 ampli-

fier is on and in a ready condition.

S - Standby LED (amber) - indicates the A1

amplifier is in "standby" mode.

F - Fault/Protection LED (red) - indicates the A1

amplifier is in a shutdown condition.

Fault/Protection: The A1 can shutdown in

Protection mode for several reasons. A com-

mon reason is that the speaker output wires

have shorted together. Another could be that

the amplifier has overheated. Should either of

these conditions occur, repairing the cause of

the output short or allowing the amplifier to cool

will solve the problem. To reset the A1, turn the

power switch (rear panel) off and then on. If the

problem persists, contact your NHT dealer.

9.7 Replacing the Fuse

The A1 amplifier's fuse

is user-serviceable.

To replace the fuse:

1. Turn the power off.

2. UNPLUG the power cord.

3. Remove the fuse holder cover (next to

power cord) with a flat blade screwdriver.

4. Remove the fuse from holder and replace

it with the appropriate type.

5. Reinstall fuse holder.

Always replace the fuse with one of the exact

same specifications.

For systems operating at 115VAC, use only a

5x20 mm, T5AL, 250V slow-blow fuse.

For systems operating at 230VAC, use only a

5x20mm, T2.5AL, 250V slow-blow fuse.

9.8 Changing the Line Voltage Setting

The A1 was designed to operate

on two line voltage settings,

115VAC and 230VAC. In the

event that it is necessary to

change the line voltage setting,

begin by turning the power

switch to the off position. Remove all the con-

nections from the amplifier, including the detach-

able power cord. Using a flat blade screwdriver,

slide the switch to the correct position. Use the

115VAC position for 110 to 120 VAC, and the

230VAC position for 220 to 240 VAC. Next you

will likely need a power cord that fits the AC

receptacle and you will need to replace the fuse

(see "Changing the Fuse" above)

10.0 Maintaining your system

Your NHT Evolution speakers and electronics

require minimal maintenance under normal use.

The cabinet may be cleaned using a soft cloth.

There is usually no need to use fluids such as

cleaners or wax to clean the surface of the

speakers. The durable lacquer finish is designed

for minimal maintenance. To clean the grille, first

remove it from the speaker, then brush lightly

with a soft brush or use a vacuum on its lowest

setting. Do not attempt to clean the actual dri-

vers. To remove dust, you may use a feather

duster. Do not expose the speakers to direct

sunlight, high temperatures, or moisture.

Electronic components should be wiped with a

dry, soft cloth to remove dust. Do not use any

liquid near or on the electronics as it may cause

electrical shock.

11.0 Evolution Technology

11.1 Monitor Technology

NHT chose the word Evolution to describe our

new products for two reasons. Evolution repre-

sents our belief that loudspeaker design must

evolve to meet the requirements of multi-chan-

nel, digital media both technologically and

ergonomically. Secondly, it represents the evo-

lution of the fundamental technologies unique to

NHT over our 15-year history.

The simple, elegant lines of our Evolution loud-

speakers and subwoofers belie the tremendous

amount of technology built into them. This sec-

tion describes the attention to detail and high

performance contained in this unique collection.

Inside the Evolution Monitors:

Both the M5 and M6, while offering different dri-

ver compliments, offer similar performance. The

distinguishing characteristic between the two

monitors is how loud they will play; the M5 is

designed for small to medium sized rooms, the

M6 for large rooms. The construction methods

and internal technological features that deliver

such high performance are the same.

A View Inside an Evolution Monitor

A) The cabinet is constructed of 3/4” MDF.

Lamination on the inside increases structural

rigidity.

B) Where necessary the cabinets are braced to

minimizing unwanted resonances.

C) The internal midrange chamber features non-

parallel internal surfaces that randomize stand-

ing waves, eliminating comb-filtering and

improving clarity and detail. The chamber is also

sized to the midrange driver so that it is acousti-

cally small. This further reduces the possibility of

standing waves.

D) The small footprint of the Neodymium tweet-

er allows closer placement to the midrange dri-

ver, improving mid-range coherence.

E) The tweeter is mounted to a solid aluminum

“Wonder” bar that acts as a massive heatsink,

providing high power handling and less power

compression.

F) The Wonder Bar is mounted to the tweeter

from the rear of the cabinet, further increasing

cabinet rigidity.

11.2 What is "Virtual" Focused

Image Geometry?

NHT's hallmark for many years was a uniquely

angled which we described as Focused Image

Geometry (F.I.G.). The angled cabinet focused

the mid-range and high frequencies into the lis-

tening room and away from room boundaries

increasing the ratio of direct to reflected sound.

This resulted in loudspeakers systems univer-

sally praised for their imaging and detail to a

wide listening area.

Evolution incorporates a "virtual" adaptation of

F.I.G. Rather than an angled cabinet, we

increase the energy at the listening position

using the crossover.

When Evolution monitors are vertically oriented

and the tweeters on the inside edge of the cabi-

net the null created in the crossover between

the mid and high frequency drivers is directed at

the sidewalls. The graph below shows the

decrease in energy, or reflected sound towards

the wall (C) and the compared to the direct

sound radiating at listening area (A & B). This

improves detail and provides a 3-dimensional

soundstage.

Television

When oriented horizontally, the null is directed at

the ceiling or floor (depending on tweeter posi-

tion) improving mid-range detail.

11.3 Boundary Switch

A loudspeaker’s mid-bass response is very

dependant on its room placement. For exam-

ple, if a speaker is tuned for placement away

from walls and is then placed on a bookshelf,

the reinforcement of mid-bass frequencies will

make the speaker sound somewhat “thick”. The

M5 and M6 feature a unique dual mode

crossover that adjusts the monitor’s response in

the mid-bass range for either placement situa-

tion. The graph below illustrates the decrease in

bass energy from 80Hz to 500Hz when the

switch is in the “1” position, making placement

on a shelf or television possible while maintain-

ing proper frequency response. The “0” position

optimizes the monitor for placement away from

room boundaries.

11.4 High Dynamic Range/Low Power

Compression

The increased dynamic range of digital media

can make much greater demands on the output

capabilities of speakers than in the past. As

speakers are pushed towards their limits, the

temperature of the drivers rises. Heat causes

the drivers impedance (resistance to AC current

flow) to increase, reducing the amount of power

the amplifier can deliver to the driver. Dynamic

range is reduced, distortion increases and

sound quality suffers.

Evolution monitors and subwoofers are

designed to minimize this phenomena in a num-

ber of important ways.

1) The 12” woofer contained in all Evolution

subwoofers and tower bass modules employs,

in addition to a massive motor structure, an alu-

minum cone attached to an aluminum former.

The cone acts as a heat sink for the driver, min-

imizing the rise in impedance and resulting dis-

tortion.

2) The Wonder Bar, mounted to the tweet-

ers in the Evolution monitors, dissipates heat

from the most fragile driver in any loudspeaker.

3) Evolution monitors are 3-way systems

with dual woofers. The input power is spread

over multiple drivers, minimizing heat build up

and distortion.

11.5 Orientation Independent Dispersion

The Evolution monitors are optimized for use in

either a horizontal or vertical orientation. This is

achieved by means of the relative placement,

size and crossover frequencies of the drivers.

The very small separation between the

midrange and tweeter drivers allows dispersion

that is very wide and well controlled. When com-

bined with the low crossover frequency between

the woofers and midrange, the resulting sound-

field permits the speaker to be used in a hori-

zontal or vertical orientation without significant

changes in frequency response and imaging

characteristics.

12.0 Glossary of Terms

Active: Uses electrical power.

Amplifier: An electronic device that increases

the current and/or voltage of a signal, providing

power to the loudspeakers (i.e. power amplifier,

integrated amplifier, receiver).

Bass: The range of audio frequencies below

160Hz, characterized by low pitch.

Crossover: An electronic circuit that divides an

audio signal into different frequency ranges.

Distortion: Any deviation from the original sig-

nal.

Driver: The moving part of a loudspeaker, which

radiates sound energy.

Dynamics: Variations in loudness of sound.

Frequency: A rate of vibration, which corre-

sponds to musical pitch, expressed in Hertz

(Hz).

Full Range: A signal encompassing the entire

frequency spectrum.

Hertz (Hz): A unit equal to one cycle per sec-

ond, used to measure the frequency of a signal

or sound.

High-Pass Filter: A filter that passes only high

frequencies above a lower limit.

Impedance: A measure of the total opposition

to current flow in an alternating current circuit,

measured in ohms.

In Phase: The polarity of an audio signal when

connected as follows: (+) to (+) and (-) to (-).

Integrated Amplifier: A preamplifier and ampli-

fier built into one chassis.

Interconnect Cable: A length of shielded wire

with plugs at both ends for feeding signals from

one electronic device to another.

L.F.E.: "Low Frequency Effects"; The .1 channel

of information recorded on most multichannel

digital sound formats.

Line-Level Connection: Low level RCA/phono

or XLR type connection.

Load: A term used to describe the impedance

that a speaker presents to an amplifier.

Low-Pass Filter: A filter that passes only low

frequencies below a higher limit.

Main Speakers: Front L & R channel speakers,

sometimes referred to as satellites.

Main-In: A line-level RCA/XLR power amplifier

input on the back of a receiver, integrated ampli-

fier or power amplifier.

Midrange: The frequency span in the middle of

the audio range, roughly 160Hz - 1300Hz. Also

used to describe the driver that reproduces

these frequencies.

Ohm: A unit of electrical resistance. That which

opposes an electric current in a conductor. In

audio, a measure of the load presented by a

device to an electrical source.

Out-of-Phase: The polarity of an audio signal

when connected as follows: (+) to (-) and (-) to

(+).

Passive: Uses no electrical power.

Phase: An expression of the relative polarities

of two signals.

Power Handling: The ability of a loudspeaker to

operate without large increases in distortion

when given varying amounts of input power.

Preamplifier: An electronic device that selects

sources and passes line-level signals to an

amplifier.

Pre-Out: A preamp line-level RCA output on the

back of a receiver, integrated amplifier or pre-

amplifier.

Receiver: A preamplifier, amplifier and tuner

built into one chassis.

Satellite: Front L & R speakers when used with

a subwoofer. Referred to as "main speakers".

Sensitivity: A ratio of voltage across the speak-

er load to the acoustic power output, measured

Low

Bass

Lower

Mid High

Mid

Bass Mid

Upper

Bass

Upper

Mid

Below

50Hz

50Hz 300Hz180Hz100Hz 700Hz

100Hz 700Hz300Hz

3KHz

and Above

180Hz 3KHz

in decibels.

Sub Out: An line level output for connection to

a subwoofer or subwoofer signal processor.

Subwoofer: A driver designed to operate over

the low bass portion of the audio range. Also

refers to a system consisting of a woofer and its

enclosure, which are physically separate from

the upper range loudspeakers.

Surround Speakers: Speakers located in the

side or rear for surround channel effects.

Treble: The upper part of the frequency spec-

trum, consisting of frequencies above about

1300Hz.

Tweeter: A small driver designed to reproduce

high frequencies.

Watt: A measure of electrical power, combining

the voltage with the electrical current required to

drive the loudspeaker.

Weight: Low frequencies below 50Hz.

Woofer: A driver designed to operate over the

bass portion of the audio range.

13.0 Trouble Shooting

Problem What To Do

Unit fails to illuminate when the power

is connected. 1) Check to see if your AC outlet has power.

2) X1 protection fuse may be blown and

needs to be replaced. Contact your NHT

dealer for assistance.

3) A1 protection fuse may be blown and

needs to be replaced. See section 10.6

changing the fuse.

Unit has no sound output 1) Verify that the ‘P’ (Green) LED is illuminated.

2) If only the ‘S’ (Amber) LED is illuminated verify that the

trigger mode switch is in the ‘Audio’ position.

3) If the trigger mode switch is in the ‘12V Ext’ position

make sure there is 12VDC signal present.

4) Verify system hookup is correct and your unit is reciev-

ing signal.

5) (A1 Only) If the ‘F’ fault (RED) LED is illuminated,

check for shorted speaker wires. Turn unit off/on to

reset.

14.0 Specifications

A1 Amplifier

Frequency response: 10Hz - 65KHz +/-3.0 dB

20Hz - 20KHz +/- 0.5 dB

Distortion: <0.01% 20Hz-1KHz

< 0.075% 10Hz - 20Khz

Power Output:

200W rms into 8 ohms at rated distortion

250W rms into 6 ohms at rated distortion

300W rms into 4 ohms at rated distortion

Signal to noise ratio: 100dB (unwtd)

Input Impedance: >10K ohms

Damping Factor: >100 into 6 ohms

Gain: +27dB (1.7V sensitivity) for full output

Input connectors:

RCA jack for unbalanced line level input

XLR jack for balanced line level input

Detachable terminal block for external trigger in/thru

Output connectors: Pair of 5-way binding post

Standby Mode: Selectable internal and external.

Internal automatic when no signal is present for >20 minutes

Power Consumption: 600W Max

Standby Mode Power Consumption: <3W

Weight: 18 lbs.

Dimensions: 1.5"H x 17"W x 11.5"D

Finish: matte black anodized front panel, black painted chassis

X1 Bass Management /

Active Crossover

Frequency response: 20Hz - 140Hz +/-3dB

through L/R input (continuously variable)

20 - 220Hz +/-3dB through LFE input (fixed)

50,80,110Hz-100KHz +/-3dB

Distortion: < 0.01% subwoofer output @ 100Hz, 1V

< 0.001% hi-pass output @ 1KHz, 1V

Signal to noise ratio: >105dB at Hi-pass output

>100dB at subwoofer output

Crossover: Low-pass continuously variable between 50-140Hz,

12dB/octave

Low-pass fixed at 220Hz,12dB/octave

High-pass selectable between 50, 80, 110Hz, 12dB/octave

Input connectors:

Gold plated L and R RCA jacks for line level input

XLR jacks for line level input

Gold plated RCA jack for LFE input

XLR jack for LFE input

Detachable terminal block for external trigger in/thru

2.1mm x 5.5mm x 9.5mm power connector

Output connectors:

Gold plated L and R RCA jacks for line level high-pass output

Gold plated RCA jack for LFE thru

XLR jacks for line level high-pass output

Gold plated RCA jacks for line level sub woofer output

XLR jacks for line level subwoofer output

Phase Control:

Variable between 0 and 90 degrees

Switchable 0 - 180 degrees

Gain Control: +10dB and 0dB input sensitivity

Stereo / Mono Switch: Stereo or mono operation

Standby Mode: Selectable internal and external.

Internal automatic when no signal is present for >20 minutes

Power Consumption: 3W

Weight: 9 lbs.

Dimensions: 1.5"H x 17"W x 11.5"D

Finish: matte black anodized front panel, black painted chassis

M5 Monitor

System type

Woofer

Midrange

Tweeter

Magnetic Shielding

Impedance (Minimum)

Impedance (Nominal)

Recommended Power

Power Peak

Power RMS

Sensitivity

Crossover Frequency

Crossover Slopes (dB/octave)

Response

-6 dB LF Cutoff

Input Connectors

Dimensions (HxWxD)

Weight

Enclosure Material:

3-way, Acoustic Suspension

5.25” laminated cone

3” paper cone

1” aluminum dome

Yes

3.6Ω

6Ω

100 watts

300 watts

150 watts

85dB (2,83V @ 1 meter)

450Hz, 3kHz

12dB high pass, 12dB low pass

66Hz - 20kHz

51 Hz

5-way binding posts

7.75” x 17.75” x 8.5”

22 lbs.

.75” MDF with backer

B5 Subwoofer Module

System type

Woofer

Midrange

Tweeter

Magnetic Shielding

Impedance (Minimum)

Impedance (Nominal)

Recommended Power

Power Peak

Power RMS

Sensitivity

Crossover Frequency

Crossover Slopes (dB/octave)

Response

-6 dB LF Cutoff

Input Connectors

Dimensions (HxWxD)

Weight

Enclosure Material:

Acoustic Suspension Subwoofer

12” aluminum cone

9Ω

12Ω

125 watts

250 watts

125 watts

88dB (2,83V @ 1 meter)

26Hz - 140Hz

24 Hz

5-way binding posts

25” x 7.75” x 17.25”

42 lbs.

.75” MDF with backer

B6 Subwoofer Module

System type

Woofer

Midrange

Tweeter

Magnetic Shielding

Impedance (Minimum)

Impedance (Nominal)

Recommended Power

Power Peak

Power RMS

Sensitivity

Crossover Frequency

Crossover Slopes (dB/octave)

Response

-6 dB LF Cutoff

Input Connectors

Dimensions (HxWxD)

Weight

Enclosure Material:

Acoustic Suspension Dual Subwoofer

(2) 12” aluminum cone

4.5Ω

6Ω

250 watts

500 watts

250 watts

94dB (2,83V @ 1 meter)

26Hz - 140Hz

24 Hz

5-way binding posts

27.1” x 8.25” x 23.65”

71 lbs.

.75” MDF with backer

M6 Monitor

System type

Woofer

Midrange

Tweeter

Magnetic Shielding

Impedance (Minimum)

Impedance (Nominal)

Recommended Power

Power Peak

Power RMS

Sensitivity

Crossover Frequency

Crossover Slopes (dB/octave)

Response

-6 dB LF Cutoff

Input Connectors

Dimensions (HxWxD)

Weight

Enclosure Material:

3-way, Acoustic Suspension

6.5” laminated cone

4” paper cone

1” aluminum dome

Yes

3.6Ω

6Ω

200 watts

400 watts

250 watts

87dB (2,83V @ 1 meter)

350Hz, 3kHz

12dB high pass, 12dB low pass

61Hz - 20kHz

45 Hz

5-way binding posts

8.25” x 20” x 10.25”

36 lbs.

.75” MDF with backer

P5 Pedestal

System type

Dimensions (HxWxD)

Weight

Enclosure Material:

Stand For M5 Monitor

25” x 7.75” x 11.75”

16 lbs.

.75” MDF with backer

P6 Pedestal

System type

Dimensions (HxWxD)

Weight

Enclosure Material:

Stand For M6 Monitor

27.1” x 8.25” x 14.25”

18 lbs.

.75” MDF with backer

T5 Tower

System type

Dimensions (HxWxD)

Weight

M5 Monitor integrated with a B5

subwoofer module

43" x 7.75" x 17.25"

40 lbs.

T6 Tower

System type

Dimensions (HxWxD)

Weight

M6 Monitor integrated with a B6

subwoofer module

47.1" x 8.25" x 23.65"

103 lbs.

W1 Subwoofer

System type

Woofer

Midrange

Tweeter

Magnetic Shielding

Impedance (Minimum)

Impedance (Nominal)

Recommended Power

Power Peak

Power RMS

Sensitivity

Crossover Frequency

Crossover Slopes (dB/octave)

Response

-6 dB LF Cutoff

Input Connectors

Dimensions (HxWxD)

Weight

Enclosure Material:

Acoustic Suspension

Dual Opposing Woofer

Subwoofer

(2) 12” aluminum cone

4.5Ω

6Ω

250 watts

500 watts

250 watts

94dB (2,83V @ 1 meter)

26Hz - 140Hz

24 Hz

5-way binding posts

22” x 13.5” x 16.65”

71 lbs.

.75” MDF with backer

W2 Subwoofer

System type

Woofer

Midrange

Tweeter

Magnetic Shielding

Impedance (Minimum)

Impedance (Nominal)

Recommended Power

Power Peak

Power RMS

Sensitivity

Crossover Frequency

Crossover Slopes (dB/octave)

Response

-6 dB LF Cutoff

Input Connectors

Dimensions (HxWxD)

Weight

Enclosure Material:

Acoustic Suspension Subwoofer

12” aluminum cone

9Ω

12Ω

125 watts

250 watts

125 watts

88dB (2,83V @ 1 meter)

26Hz - 140Hz

24 Hz

5-way binding posts

14” x 14” x 14”

38 lbs.

.75” MDF with backer

Nht Evolution System Users Manual

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