Yamaha Ems 68S Owners Manual EMX88S/68S_E

Ems-68S-Owners-Manual yamaha-ems-68s-owners-manual-133372

EMS 68S to the manual 75213731-5093-4866-a843-4777af4c0d86

2014-12-13

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Page Count: 32

Introduction
Features
EMX88S/EMX68S Quick Guide
Front and rear panel
Connections
Basic Operation
Example setups
- As a conference PA system/installed sound system
  - Connections
  - Playing back a CD player
- As a band PA
  - Connections
  - Using an external effect
Installing an optional rack mount kit
Troubleshooting
- Powered Mixer Q&A
Specifications

Owner’s Manual

Keep This Manual For Future Reference.

FCC INFORMATION (U.S.A.)

1. IMPORTANT NOTICE: DO NOT MODIFY THIS UNIT! This product, when installed as indicated in the instructions contained in this manual, meets FCC

requirements. Modifications not expressly approved by Yamaha may void your authority, granted by the FCC, to use the product.

2. IMPORTANT: When connecting this product to accessories and/or another product use only high quality shielded cables. Cable/s supplied with this product MUST

be used. Follow all installation instructions. Failure to follow instructions could void your FCC authorization to use this product in the USA.

3. NOTE: This product has been tested and found to comply with the requirements listed in FCC Regulations, Part 15 for Class “B” digital devices. Compliance with

these requirements provides a reasonable level of assurance that your use of this product in a residential environment will not result in harmful interference with

other electronic devices. This equipment generates/uses radio frequencies and, if not installed and used according to the instructions found in the users manual, may

cause interference harmful to the operation of other electronic devices. Compliance with FCC regulations does not guarantee that interference will not occur in all

installations. If this product is found to be the source of interference, which can be determined by turning the unit “OFF” and “ON”, please try to eliminate the

problem by using one of the following measures: Relocate either this product or the device that is being affected by the interference. Utilize power outlets that are on

different branch (circuit breaker or fuse) circuits or install AC line filter/s. In the case of radio or TV interference, relocate/reorient the antenna. If the antenna lead-in

is 300 ohm ribbon lead, change the lead-in to coaxial type cable. If these corrective measures do not produce satisfactory results, please contact the local retailer

authorized to distribute this type of product. If you can not locate the appropriate retailer, please contact Yamaha Corporation of America, Electronic Service

Division, 6600 Orangethorpe Ave, Buena Park, CA 90620

The above statements apply ONLY to those products distributed by Yamaha Corporation of America or its subsidiaries.

• Explanation of Graphical Symbols

The lightning flash with 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 magni-

tude to constitute a risk of electric shock to

persons.

The exclamation point within an equilat-

eral triangle is intended to alert the user to

the presence of important operating and

maintenance (servicing) instructions in the

literature accompanying the product.

CAUTION: TO REDUCE THE RISK OF

ELECTRIC SHOCK, DO NOT REMOVE

COVER (OR BACK). NO USER-SERVICEABLE

PARTS INSIDE. REFER SERVICING TO

QUALIFIED SERVICE PERSONNEL.

CAUTION

RISK OF ELECTRIC SHOCK

DO NOT OPEN

The above warning is located on the

rear of the unit.

European Specifications Only

This mark indicates a dangerous electrically live terminal.

When connecting an external wire to this terminal, it is

necessary either to have “a person who have received

appropriate guidance on handling” make the connection or to

use leads or a cord that have been manufactured in such a way

that the connection can be made simply and without problem.

WARNING: THIS APPARATUS MUST BE EARTHED

IMPORTANT

THE WIRES IN THIS MAINS LEAD ARE COLOURED IN

ACCORDANCE WITH THE FOLLOWING CODE:

GREEN-AND-YELLOW : EARTH

BLUE : NEUTRAL

BROWN : LIVE

As the colours of the wires in the mains lead of this apparatus may

not correspond with the coloured markings identifying the terminals in

your plug, proceed as follows:

The wire which is coloured GREEN and YELLOW must be

connected to the terminal in the plug which is marked by the letter E

or by the safety earth symbol or coloured GREEN and YELLOW.

The wire which is coloured BLUE must be connected to the terminal

which is marked with the letter N or coloured BLACK.

The wire which is coloured BROWN must be connected to the

terminal which is marked with the letter L or coloured RED.

* This applies only to products distributed by YAMAHA KEMBLE

MUSIC (U.K.) LTD.

EMX88S/EMX68S—Owner’s Manual

Precautions

WARNING

• Connect this unit’s power cord only to an AC outlet of the type

stated in this Owner’s Manual or as marked on the unit. Failure

to do so is a ﬁre and electrical shock hazard.

• Do not allow water to enter this unit or allow the unit to

become wet. Fire or electrical shock may result.

• Do not place a container with liquid or small metal objects on

top of this unit. Liquid or metal objects inside this unit are a ﬁre

and electrical shock hazard.

• Do not place heavy objects, including this unit, on top of the

power cord. A damaged power cord is a ﬁre and electrical shock

hazard. In particular, be careful not to place heavy objects on a

power cord covered by a carpet.

• Use only the included power cord for this unit. Using other

types may be a ﬁre and electrical shock hazard.

• The power to this device is not completely shut off even when

the power switch is turned off. Locate the device close to the AC

outlet so you can easily reach the power plug.

• Do not scratch, bend, twist, pull, or heat the power cord. A

damaged power cord is a ﬁre and electrical shock hazard.

• Do not remove the unit’s cover. You could receive an electrical

shock. If you think internal inspection, maintenance, or repair

is necessary, contact your dealer.

• Do not modify the unit. Doing so is a ﬁre and electrical shock

hazard.

• If lightning begins to occur, turn off the power switch of the

unit as soon as possible, and unplug the power cable plug from

the electrical outlet.

• If there is a possibility of lightning, do not touch the power

cable plug if it is still connected. Doing so may be an electrical

shock hazard.

• If the power cord is damaged (i.e., cut or a bare wire is

exposed), ask your dealer for a replacement. Using the unit

with a damaged power cord is a ﬁre and electrical shock hazard.

• Should this unit be dropped or the cabinet be damaged, turn the

power switch off, remove the power plug from the AC outlet,

and contact your dealer. If you continue using the unit without

heeding this instruction, ﬁre or electrical shock may result.

• If you notice any abnormality, such as smoke, odor, or noise, or

if a foreign object or liquid gets inside the unit, turn it off

immediately. Remove the power cord from the AC outlet. Con-

sult your dealer for repair. Using the unit in this condition is a

ﬁre and electrical shock hazard.

CAUTION

• Hold the power cord plug when disconnecting it from an AC

outlet. Never pull the cord. A damaged power cord is a poten-

tial ﬁre and electrical shock hazard.

• Do not touch the power plug with wet hands. Doing so is a

potential electrical shock hazard.

• This unit has ventilation holes at the rear to prevent the internal

temperature rising too high. Do not block them. Blocked venti-

lation holes are a ﬁre hazard.

• When rack-mounting the unit, allow enough free space around

the unit for normal ventilation. This should be10 cm at the

sides, 15 cm behind, and 25 cm above.

For normal ventilation during use, remove the rear of the rack

or open a ventilation hole.

If the airﬂow is not adequate, the unit will heat up inside and

may cause a ﬁre.

• Use only speaker cables when connecting speakers to ampliﬁer

outputs. Using other types of cables is a ﬁre hazard.

• Clean the contacts of the phone plug before connecting it to the

SPEAKERS jack of this unit. Dirty contacts may generate heat.

• XLR-type connectors are wired as follows: pin 1: ground, pin 2:

hot (+), and pin 3: cold (-).

• The performance of components with moving contacts, such

switches, rotary controls, faders, and connectors, deteriorates

over time. The rate of deterioration depends on the operating

environment and is unavoidable. Consult your dealer about

replacing defective components.

• Using a cell phone (mobile telephone) near this unit may induce

noise. If noise occurs, use the telephone away from the unit.

• Do not set all equalizer controls and faders to maximum.

Doing so may cause oscillation depending on the condition of

the connected unit and speakers, and may damage the speakers.

Operation

Installation

In case an abnormality occurs during operation

Installation

Operation

Maintenance

PRECAUTIONS FOR OPERATION – FOR CORRECT OPERATION –

Connector pin assignments

Replacing abrasive parts

Influence on cell phone usage

Volume level setting

Precautions

EMX88S/EMX68S—Owner’s Manual

Introduction

Thank you for purchasing the Yamaha EMX88S/EMX68S Powered Mixer. The

EMX88S/EMX68S has the following features.

In order to take full advantage of the EMX88S/EMX68S and enjoy long and trouble-free

performance, please read this owner’s manual carefully, and keep it in a safe place for

future reference.

Features

• The EMX88S/EMX68S features eight input channels

(EMX88S), six input channels (EMX68S) that support

a wide range of audio sources, from microphones to

line-level devices. The microphone input for each

channel has +15 V phantom power for use with con-

denser-type microphones.

• Two powerful main amps are built-in to deliver 400W

+ 400W (800W monaural when bridged).

According to your needs, the output signal to the

power amps can be either stereo [MAIN L-R], [MAIN

(L+R)] + monitor [MAIN (L+R) - MON], or [MAIN

(L+R)] (bridge connection).

■

Stereo

The stereo-mixed main signal will be output from

speaker output jacks A and B of the EMX88S/

EMX68S. Either one or two speakers can be con-

nected to each set of speaker jacks.

■

[MAIN (L+R)] + monitor

The monaural-mixed main signal will be output

from speaker jacks A of the EMX88S/EMX68S, and

the monitor signal will be output from speaker

jacks B. Either one or two speakers can be con-

nected to each set of speaker jacks.

■

[MAIN (L+R)] (bridge connection)

The two power amps will be bridged, and the mon-

aural-mixed main signal will be output from the

BRIDGE jack. This allows high-volume output

when using only one speaker.

• Individual seven-band graphic equalizers are provided

to the main and the monitor sections. In this way, you

can individually adjust the volume level and frequency

response of the main speakers and monitor speakers.

• Two limiter circuits are built-in to prevent excessive

input levels to the amp.

• The 16 built-in effect types are equivalent in quality to

those of the acclaimed Yamaha SPX series of multi-

effect units, and allow a variety of effects to be applied

to add reverb or ambience to vocals or instruments.

The16 types include TAP DELAY, which lets you easily

adjust the delay time.

• The EMX88S/EMX68S has implemented “EEEngine”,

Yamaha’s epochal amp drive technology to create an

unrivaled high-efﬁciency drive.

The EEEngine’s energy-saver/low-heat-generation

design has reduced power consumption to 50% or

less, and reduced heat generation to 35% or less (in

ﬁeld applications, compared to Yamaha’s previous

models), and has lead to a reduction in energy cost

and to less-restrictive installation requirements related

to heat generation.

Contents

Introduction........................................................... 5

Features ...............................................................5

EMX88S/EMX68S Quick Guide .................................6

Front and rear panel .................................................10

Control panel ......................................................10

Input/output panel............................................... 14

Rear panel.......................................................... 16

Installation ..........................................................16

Connections .............................................................17

Basic Operation ........................................................20

Connecting microphones and instruments .........20

Sending an independent mix to the monitor speak-

ers ...................................................................20

Using the digital effect ........................................20

Example setups ........................................................22

As a conference PA system/installed sound

system ............................................................ 22

As a band PA...................................................... 23

Installing an optional rack mount kit .........................25

Troubleshooting .......................................................26

Specifications ...........................................................27

General specifications ........................................27

Input specifications .............................................28

Output specifications ..........................................28

Dimensions .........................................................29

Block and Level diagram ....................................30

EMX88S/EMX68S Quick Guide

EMX88S/EMX68S—Owner’s Manual

EMX88S/EMX68S

Quick Guide

The following steps (1–5) explain the basic con-

nection and operation of the EMX88S/EMX68S.

Also, please read “Front and Rear Panel” and

“Basic Operation” following this Quick Guide

section to learn more about using the EMX88S/

EMX68S.

Connection

Connecting speakers

Using speaker cables, connect each speaker to the

SPEAKERS A 1 jack and to the B 1 jack in the

SPEAKERS jack section on the rear panel of the

EMX88S/EMX68S.

• The diagram above shows an example of connecting

two main speakers. Refer to pages 17–18 for other

connection examples.

• You may connect to either of the two jacks on the

speakers.

• Be sure to use a cable designed for speaker connec-

tion.

Never connect the speakers in the manner shown

below. Otherwise, the EMX88S/EMX68S’s built-

in power ampliﬁer will be damaged.

Setting the power ampliﬁer mode

Set the power amp select switch (located on the

right corner on the panel) to MAIN L-R.

• This Quick Guide assumes that two main speakers

are connected. Refer to pages 13, 17, 18 for other

connections and power amp select switch settings.

• When the power amp select switch is set to the

MAIN L-R position, the stereo L signal will be out-

put from the SPEAKERS A jacks, and the stereo R

signal will be output from the SPEAKERS B jacks.

STEP 1

EMX88S (EMX68S)

Power amp select switch

EMX88S/EMX68S Quick Guide

EMX88S/EMX68S—Owner’s Manual

Connecting a microphone

Make sure that the power is turned off to the

EMX88S/EMX68S.

Connect a microphone to the Low-Z jack or MIC

jack.

Using a condenser microphone

Turn on the PHANTOM switch (located in the upper

right corner on the panel).

• Do not connect or disconnect a condenser micro-

phone while the power to the unit is on and the

PHANTOM switch has been turned on.

Connecting a CD player, MD player, and/or cassette

deck

Connect a CD player or MD player to the 2TR IN

jacks. Refer to the operation manual of the corre-

sponding device for more information on the

input and output of the device.

• To connect a second player, use the LINE jack or Hi-

Z jack.

• You cannot use the Hi-Z jack and the Low-Z jack for

the same channel at the same time. If a microphone

has already been connected to the Low-Z jack of a

channel, you cannot connect a player to the Hi-Z

jack of the channel.

• Connect a recorder to the REC OUT jacks.

EMX88S (EMX68S)

Microphone

EMX88S (EMX68S)

PHANTOM switch

EMX88S (EMX68S)

Recorder

(Cassette, DAT, MD)

CD player

EMX88S/EMX68S Quick Guide

EMX88S/EMX68S—Owner’s Manual

Connecting an electric acoustic guitar or electric

bass

Connect an electric acoustic guitar or electric

bass to the Super Hi-Z jacks.

• If you wish to use a guitar signal processor or bass

effect unit, connect them to the Hi-Z jack or LINE

jack. You cannot use the Hi-Z jack and the Low-Z

jack for the same channel at the same time. If a

microphone has already been connected to the Low-

Z jack of a channel, you cannot connect the effect

unit to the Hi-Z jack of the channel.

Connecting an electronic musical instrument

To the EMX88S/EMX68S’s LINE jacks, you can

connect an electronic musical instrument such as

a synthesizer, drum machine, signal processor

connected to an electric guitar, etc. Refer to the

diagram below to make a stereo connection from

the output jacks (such as L/MONO and R) of an

electronic musical instrument to the LINE jacks

in stereo.

If you wish to connect multiple instruments,

make a monaural connection as shown below.

• You can also use the Hi-Z jacks and Super Hi-Z

jacks to connect multiple instruments. You cannot

use the Hi-Z jack and the Low-Z jack for the same

channel at the same time. If a microphone has

already been connected to the Low-Z jack of a chan-

nel, you cannot connect an instrument to the Hi-Z

jack of the channel.

Power on

1 Turn on the power to all external devices con-

nected to the EMX88S/EMX68S.

2 Make sure that the MASTER controls in the

MONITOR section and the MAIN section are set

to “0,” then press the POWER switch on the

EMX88S/EMX68S to turn on the power.

• Be sure to follow the power up sequence speciﬁed

above to prevent the speakers from being damaged.

• To correct the low range, turn on the YAMAHA

SPEAKER PROCESSING switch in the upper right

corner of the panel.

EMX88S (EMX68S)

Electric-acoustic

guitar Electric

bass

EMX88S (EMX68S)

Synthesizer,

Drum machine,

Guitar processor

EMX88S (EMX68S)

STEP 2

EMX88S (EMX68S)

EMX88S/EMX68S Quick Guide

EMX88S/EMX68S—Owner’s Manual

Sound output

Set the MASTER control in the MAIN section to

“

√√

,” then while playing an instrument con-

nected to a channel to be checked (or while

speaking to a connected microphone), adjust the

LEVEL control of the corresponding channel so

that the 0 LED of the peak level indicator in the

MAIN section will light up momentarily.

• Do not press the PAD switch if sound is input from

the microphone. Otherwise, press the PAD switch

on.

• If you are using one of the speakers as a monitor

speaker, use the MASTER control of the MONITOR

section to adjust its volume.

• Note that if the LIMITER indicator stays lit for a

long time, the built-in ampliﬁer and speakers may

be damaged.

Applying built-in effects

1 Turn on the ON switch in the DIGITAL EFFECT

section. The ON switch indicator lights up.

2 Using the Program selector, select one of 16 effect

types.

3 Adjust the amount of effect applied by using the

EFFECT control of the target channel and the

EFFECT RTN control in the MAIN section.

Power off

1 Press the POWER switch of the EMX88S/EMX68S

to turn off the power to the unit.

2 Turn off the power to all connected devices.

• Be sure to follow the power off sequence speciﬁed

above to prevent the speakers from being dam-

aged.

• Set the MASTER controls in the MAIN section

and the MONITOR section to “0” for use next

time (so that a loud noise will not sound the next

time you turn on the power to the unit).

STEP 3

EMX88S (EMX68S)

STEP 4

EMX88S (EMX68S)

STEP 5

Front and rear panel

EMX88S/EMX68S—Owner’s Manual

Front and rear panel

Control panel

■

Channel section

Use these controls to adjust factors such as the

equalization, (frequency response), volume,

effect and monitor output level for the input sig-

nal to each channel.

Equalizer controls (HIGH, MID, LOW)

This is a 3-band equalizer that adjusts the high

frequency range, mid frequency range, and low

frequency range of each channel. Response is ﬂat

when the knobs are in the “

▼

” position. Rotating

it toward the right will boost the corresponding

frequency band, and rotating it toward the left

will cut it.

The base frequency (or center frequency), range

of boost or cut, and equalizer type of each band

are as follows.

HIGH: 10 kHz ±15 dB shelving type

MID: 2.5 kHz ±15 dB peaking type

LOW: 100 Hz ±15 dB shelving type

MONITOR control

For each channel, this controls the amount of sig-

nal that is sent to the MONITOR bus.

The signal of the MONITOR bus is sent to the

MONITOR jacks (input/output panel

EFFECT control

For each channel, this controls the amount of sig-

nal that is sent to the EFFECT bus.

The signal of the EFFECT bus is sent to the built-

in digital effect, and to the EFFECT OUT jacks

(input/output panel

PAN control (BAL/PAN control for CH7/8

(EMX88S), CH5/6 (EMX68S))

This knob adjusts the stereo image (L/R) for each

channel. Adjust for equal volume on left and

right with a sound source input to the CH7 and 8

(EMX88S), CH5 and 6 (EMX68S) LINE connec-

tors (L/R).

LEVEL control

This adjusts the output level for each channel.

PAD switch (1–6 (EMX88S) only, 1–4

(EMX68S) only)

This switch attenuates the input signal by 30 dB.

When connecting a line level device to channels

1–6 (EMX88S), 1–4 (EMX68S), or if the mic

input is distorted, turn this switch on (the

pressed-in position).

Note:

The signal is sent to the MONITOR bus

from a location before the level control (

) of

each channel. This means that it will not be af-

fected by the setting of the Level control.

Note:

The signal is sent to the EFFECT bus

from a location after the level control (

) of

each channel. This means that the amount of

signal that is sent to the EFFECT bus will be af-

fected not only by the setting of the effect con-

trol, but also by the setting of the level control.

Control panel

EMX88S/EMX68S—Owner’s Manual

■

DIGITAL EFFECT section

This section allows you to turn the built-in digital

effect on/off and to select the effect type.

PROGRAM selector

This knob selects the effect type for the internal

digital effect.

PARAMETER control

This knob adjusts the parameter of the internal

digital effect.

* If TAP DELAY is selected by the PROGRAM

selector, this adjusts the amount of feedback.

DIGITAL EFFECT ON switch

Use this switch to turn the digital effect on and

off. When this switch is on, the effect bus signal

processed with the built-in digital effect is sent to

the stereo (MAIN L, R) bus and MONITOR bus.

The mix level of the effect sound is adjusted with

the EFFECT RTN control in the MAIN and

MONITOR sections.

The LED beside the switch will light when the

effect is on.

TAP switch

Only if the PROGRAM selector has selected

TAP DELAY as the internal effect type, you can

press this switch to set the desired delay time.

Press the TAP switch several times, and the inter-

val between the last two presses will be set as the

delay time. The speciﬁed time will be remem-

bered even if the power is turned off.

The LED beside the switch will blink in synchro-

nization with the delay time only when the effect

type is TAP DELAY.

■

MAIN section

This section allows you to adjust the tone and

volume of the stereo (MAIN L, R) bus, the mix

level of the built-in effect, and the mix level of the

external input.

Graphic equalizer

The EMX88S/EMX68S has a 7-band graphic

equalizer for adjusting the frequency response of

the stereo (MAIN L, R) bus signal. This allows

you to cut or boost each frequency band by a

maximum of ±12dB.

These graphic equalizer settings affect both the

stereo (MAIN L, R) bus signal output to the

speakers and the line level signal output from the

MAIN (STEREO) jack (input/output panel

EFFECT RTN control

Use this control to adjust the effect signal sent to the

stereo (MAIN L, R) bus from the built-in digital

effect.

AUX IN control

This control adjusts the amount of signal that is

sent from the AUX IN jack to the stereo (MAIN

L, R) bus.

BCD

Front and rear panel

EMX88S/EMX68S—Owner’s Manual

2TR IN control

This adjusts the amount of signal that is sent

from the 2TR IN jacks to the stereo (MAIN L, R)

bus.

MASTER control

This control adjusts the stereo (MAIN L, R) bus

signal output level.

This setting is output to the SPEAKERS A, B,

BRIDGE jacks and the MAIN (STEREO) jack

(input/output panel

) on the rear panel and

appears in the stereo (MAIN L, R) bus signal.

Peak level indicator

This indicator allows you to monitor the level of

the signal which is output from the MAIN (STE-

REO) jack (input/output panel

■MONITOR section

This section allows you to adjust the tone and

volume of the MONITOR bus, and specify the

mix level of the built-in digital effect.

GGraphic equalizer

The EMX88S/EMX68S has a 7-band graphic

equalizer for adjusting the frequency response of

the MONITOR bus signal. This allows you to cut

or boost each frequency band by a maximum of

±12dB. You can use these sliders to reduce the

level of frequency bands at which feedback easily

occurs. Frequency response is ﬂat when a slider is

in the center position. Moving a slider in the pos-

itive direction will boost, and in the negative

direction will cut.

These graphic equalizer settings affect both the

MONITOR bus signal output to the speakers and

the line level signal sent from MONITOR jack

signal (input/output panel 7).

HEFFECT RTN control

This control adjusts the effect signal level sent to

the MONITOR bus from the built-in digital

effect.

I2TR IN control

This control adjusts the amount of signal that is

sent from the 2TR IN jacks to the MONITOR

bus.

JMASTER control

This control adjusts the MONITOR bus signal

output level.

This setting is output to both the front and rear

panel MONITOR jacks and appears in the MON-

ITOR bus signal.

KPeak level indicator

This indicator allows you to monitor the level of

the signal which is output from the MONITOR

jack (input/output panel 7).

■PHANTOM switch, indicator

LPHANTOM ON, OFF switch

This switch turns the phantom power supply on/

off for the Low-Z XLR type input jacks of chan-

nels 1–6 (EMX88S), 1–4 (EMX68S).

Turn this switch off if you do not use it.

Note: To avoid distortion, adjust the MASTER

control (E) so that the 0 indicator lights occa-

sionally.

Note: To avoid distortion, adjust the MASTER

control (J) so that the 0 indicator lights occa-

sionally.

Control panel 13

EMX88S/EMX68S—Owner’s Manual

■POWER AMP section

Here you can select the operating mode of the

power amp. You can also check the operation of

the limiter circuit.

MLIMITER indicator

This indicator lights up when the level of the sig-

nal output from the power amp section reaches

the maximum and the limiter is activated. Adjust

appropriate control so that the indicator lights up

for only a short while when the signal reaches the

maximum level.

NPower amp select switch

Select one of the following settings to specify the

signals to be routed to the corresponding jacks

according to the speaker connection at the

SPEAKERS jacks 1 on the rear panel.

•MAIN L-R

The stereo (MAIN L, R) bus signals are output

from the SPEAKERS A 1, 2 jacks and the SPEAK-

ERS B 1, 2 jacks. The ﬁnal level of these signals is

adjusted by the MAIN MASTER control.

•MAIN (L+R)-MON

The MONITOR bus signals are output from the

SPEAKERS B 1, 2 jacks, and a monaural signal

that is a mix of the stereo (MAIN L, R) bus sig-

nals is output from the SPEAKERS A 1, 2 jacks.

The ﬁnal level of these signals is adjusted by the

MAIN MASTER control and the MONITOR

MASTER control.

•MONO (BRIDGE)

The monaural signal that is a mix of the stereo

(MAIN L, R) bus is output from the BRIDGE

jack. The ﬁnal level of this signal is adjusted by

the MAIN MASTER control. Set the switch to

this position when you connect only a single

speaker for high-volume ampliﬁcation.

■YAMAHA SPEAKER PROCESSING

OON/OFF switch

This switch enables you to compensate the low

range of the speakers. The low range balance

when this switch is on varies depending on the

speakers.

First, check the low range balance by auditioning

the resultant sound, then set this switch to on or

off.

■STAND-BY

PON/OFF switch

This switch mutes (silences) the input signals

from channels 1–8 (EMX88S) or channels 1–6

(EMX68S). The indicator will blink when this

switch is on.

The on/off setting of this switch does not affect

the signal from the AUX IN jacks or 2TR IN

jacks.

■Power switch and indicator

QPower ON/OFF switch and indicator

This switch turns the power of the EMX88S/

EMX68S on/off. When the switch is turned on,

the indicator lights up.

Note: The indicator lights up or flashes for a

longer duration if the power amp section is sig-

nificantly overloaded, which could result in

malfunction. Avoid such a situation.

Note: Before turning the EMX88S/EMX68S on/

off, turn down the MASTER controls of the

MONITOR and MAIN section.

14 Front and rear panel

EMX88S/EMX68S—Owner’s Manual

Input/output panel

1Channel input jacks (Hi-Z, Low-Z)

1–6 (EMX88S), 1–4 (EMX68S)

These are the input jacks for channels

1–6 (EMX88S), 1–4 (EMX68S).

By using the PAD switches (control panel 6) you

can connect any of the jacks to a wide range of

sources from mics to line level devices (synthesiz-

ers or rhythm boxes etc.). The Low-Z jacks can

provide +15 V phantom power, allowing you to

use condenser microphones.

Both Hi-Z and Low-Z are balanced, and are com-

patible with microphones of output impedance

50–600Ω or line level devices of 600Ω. The nom-

inal input level is from –40 dB to –10 dB for the

Hi-Z jacks, and from –50 dB to –20 dB for the

Low-Z jacks.

Pin connections for the Hi-Z and Low-Z jacks are

as follows.

2Super Hi-Z jacks

These two phone jacks are the input connectors

for input channel 5–6 (EMX88S), 3–4 (EMX68S).

They are unbalanced, can be used simulta-

neously, and their high input impedance makes

them ideal for use with instruments such as elec-

tric-acoustic guitar and electric bass. They can

also be used with line-level sources, such as syn-

thesizers and drum machines.

3Channel input jacks (MIC/LINE)

7–8 (EMX88S), 5–5 (EMX68S)

These are the input jacks for channels

7–8 (EMX88S), 5–6 (EMX68S).

Connect microphones to the MIC jacks. Connect

line-level devices, such as synthesizers to LINE L

(MONO)/R jacks if the devices are stereo sound

sources. Use the LINE L (MONO) jack if the

devices are monaural sound sources. The MIC

jacks can provide +15 V phantom power, allow-

ing you to use condenser microphones.

The MIC jacks are balanced, and are compatible

with microphones of output impedance 50–

600Ω.

The LINE jacks are unbalanced, and are compati-

ble with line level devices of 600Ω output imped-

ance. Nominal input level is –50 dB for the MIC

jacks and –10 dB for the LINE jacks.

1657

Low-Z jacks

(XLR type) Hi-Z jacks

(TRS phone jacks)

Pin 1: ground Sleeve: ground

Pin 2: hot (+) Tip: hot (+)

Pin 3: cold (–) Ring: cold (–)

Note: It is not possible to simultaneously use

both the Hi-Z and Low-Z inputs of a given

channel. For each channel, use only one of the

inputs as appropriate for the input source.

Phantom power is switched on/off in simulta-

neously for channels 1–8 (EMX88S), 1–6

(EMX68S). For this reason, devices which do

not require phantom power must be connected

to the Hi-Z or LINE jacks if the PHANTOM

switch (control panel L) is on.

GND

RST

GND

+- Note: The MIC and LINE inputs for channel

7 (EMX88S), 5 (EMX68S) can be used simulta-

neously but their levels cannot be adjusted sep-

arately (Same for channel 8 (EMX88S),

6 (EMX68S).)

Input/output panel 15

EMX88S/EMX68S—Owner’s Manual

4EFFECT OUT jack

The input of an external effect such as a delay or

echo can be connected to this jack.

The signal adjusted by the EFFECT control of

each channel will be sent to the EFFECT bus, its

level adjusted by the EFFECT OUT control, and

output from this jack.

The nominal output level and impedance are

+4 dB/10 kΩ.

5FOOT SW jack

You can connect a Yamaha FC5 foot switch (sold

separately) to this jack and use it to turn the

built-in digital effect on and off. The Digital

Effect ON switch on the front panel must always

be set to ON in order to use the foot switch.

6AUX IN/2TR IN-INPUT TO MAIN jacks

These are input jacks that allow the signal from

an external device to be added to the MAIN out-

put.

•AUX IN jacks: Connect these jacks to the

output jacks of an external effects processor.

If the effects processor has a stereo output,

connect it to the AUX IN L (MONO) and R

jacks. If it has monaural output, use the AUX

IN L (MONO) jack. Signal input to these

jacks is sent to the stereo (MAIN L, R) bus.

•2TR IN jacks: Use these jacks to connect a

stereo device, such as a cassette player or a

CD player. The signals input to these jacks is

sent to the stereo (MAIN L, R) bus.

The nominal input level and impedance are –10 dB/

600Ω for the AUX IN jack, and –10 dBV/600Ω

for the 2TR IN jacks.

7REC OUT/MAIN (STEREO)/MONITOR-

OUTPUT jacks

These are output jacks which send line level sig-

nals from the EMX88S/EMX68S to external

devices. A stereo recording device such as a cas-

sette recorder or MD recorder can be connected

to the REC OUT jacks, and a playback device

such a power amp can be connected to the MON-

ITOR and MAIN (STEREO) jacks. The signals

sent from each jack are as follows.

•REC OUT jacks: The stereo (MAIN L, R)

bus signal before it has passed through the

MASTER control and graphic equalizer

•MONITOR jack: The MONITOR bus signal

which has passed through the MONITOR

MASTER control and graphic equalizer

•MAIN (STEREO) jack: The stereo (MAIN L,

R) bus signal which has passed through the

MAIN MASTER control and graphic equal-

izer

The nominal output level and impedance are

–10 dBV/10 kΩ for the REC OUT jacks, and

+4 dB/10 kΩ for the MONITOR/MAIN (STE-

REO) jacks.

16 Front and rear panel

EMX88S/EMX68S—Owner’s Manual

Rear panel

1Speaker output jacks (SPEAKERS)

Connect speakers here. The EMX88S/EMX68S

has two internal power amps. There are three

ways in which speakers can be connected to the

EMX88S/EMX68S.

•Two-channel connection

•Two-channel parallel connection

•Bridge connection

At this time, use the power amp select switch N

on the control panel to select a signal sent to the

correct jacks.

Refer to the “Connections” section on the next

page.

2AC IN socket

Connect the included power cord to this socket.

Connect the plug of the power cord to an AC out-

let that meets the requirements stated in the spec-

iﬁcations in this document.

Installation

The EMX88S/EMX68S uses a forced cooling system with intake on the bottom of the rear panel and exhaust

on the top of the rear panel to avoid blocking the heated air ﬂow.

2 1

Front

15cm

or less

Exhaust

Intake

Connections 17

EMX88S/EMX68S—Owner’s Manual

Connections

When connecting various devices, make sure the cables and plugs have the correct rating.

Be sure to use cables designed for the purpose when you connect speakers to speaker jacks.

■Connecting main speakers

There are three ways in which speakers can be connected to the EMX88S/EMX68S.

The speaker impedance requirement varies depending on how you connect the speakers. Refer to the dia-

grams below to make sure the speaker impedance will not be lower than the speciﬁed value.

■When the power amp select switch is set to MAIN L-R or MAIN (L+R)-MON:

• 2-channel connections

Connect either one or two speakers each to jacks A and jacks B.

If the power amp select switch is set to MAIN L-R, the signals of the MAIN L and MAIN R buses will be out-

put respectively to the speakers connected to the A and B jacks. If the power amp select switch is set to MAIN

(L+R)-MON, the summed signals of the MAIN L bus + R bus and the signal of the MONITOR bus will be

output respectively to jacks A and B.

For either setting of the switch, use speakers with an impedance in the range of 4–8 ohms if you are connect-

ing only one speaker to each set of outputs. A maximum output of 400W + 400W will be obtained when 4-

ohm speakers are used.

• 2-channel parallel connections

If you connect two speakers to each set of outputs, use speakers with an impedance in the range of 8–16 ohms.

A maximum output of 400W + 400W will be obtained when 8-ohm speakers are used.

Power amp select switch

4Ω–8Ω4Ω–8Ω

Not used

8Ω–16Ω8Ω–16Ω8Ω–16Ω8Ω–16Ω

Power amp select switch

Not used

18 Connections

EMX88S/EMX68S—Owner’s Manual

■When the power amp select switch is set to MAIN (L+R) BRIDGE:

•Bridge connection

Connect only one 8–16 ohm speaker to the BRIDGE jack. The speaker will output the combined signal of the

MAIN L bus + R bus. A maximum output of 800 W will be obtained when an 8-ohm speaker is used.

■Connecting a monitor speaker

You can connect a powered speaker to the MONITOR jack.

Caution:

When using two-channel connection or two-channel parallel connection, do not connect a speaker to the

BRIDGE jack.

When using a bridge connection, do not connect a speaker to either the A or B jacks.

The BRIDGE jack has a protective cap that prevents a speaker from being accidentally connected to it when

you are using two-channel or two-channel parallel connections. Remove this protective cap only when mak-

ing a bridge connection.

8Ω–16Ω

Power amp select switch

Not usedNot used

Powered monitor

VOL

Connections 19

EMX88S/EMX68S—Owner’s Manual

■Example connections

Cassette Deck

Foot switch

(YAMAHA FC5)

Microphone

Monitor Speakers

Main Speakers

Synthesizer, Drum Box

Power amp

Effect Processor

CD Player

* Speakers normally connect to the jacks on

the rear panel. When more speaker outputs

are needed, use the MAIN (STEREO) jacks

are for stereo output and the MONITOR

jack is for monaural output.

Electric-acoustic

guitar

Electric bass

20 Basic Operation

EMX88S/EMX68S—Owner’s Manual

Basic Operation

This section explains basic operation of the EMX88S/EMX68S.

Connecting microphones

and instruments

1Before connecting mics or instruments,

make sure that the power of all equip-

ment (where applicable) is turned off.

Also make sure that the level controls of

each channel of the EMX88S/EMX68S

and the MASTER control of the MAIN sec-

tion are turned down.

2Connect cables to your mics and instru-

ments, and insert the other end of the

cable ﬁrmly into the appropriate Low-Z/

Hi-Z jack or the MIC/LINE jack.

3Turn the power on in the order of periph-

eral devices ➞ EMX88S/EMX68S.

4Set the MAIN section MASTER control to

the “√√

√√” position.

Adjusts the stereo image of each channel using

the PAN or BAL/PAN controls. (Adjust the bal-

ance between the left and right volume levels of

the sound sources connected to the LINE con-

nectors L/R.)

5While speaking into the mic (while play-

ing the instrument), adjust the channel

LEVEL control so that the 0 LED of the

MAIN section peak level meter lights

occasionally.

6If you wish to adjust the tone of each

channel, rotate the equalizer controls as

desired.

7Use the MAIN section graphic equalizer

and MASTER control to adjust the overall

volume and tone.

Sending an independent

mix to the monitor speakers

1Set the MONITOR section MASTER con-

trol to the “√√

√√” position.

2Adjust the MONITOR control to increase

the level of the channel you want to hear

from the monitor speaker, and also adjust

so that the peak level meter 0 LED of the

monitor section lights up occasionally.

3Use the graphic equalizers and MASTER

controls of the MAIN/MONITOR sections

to adjust the overall volume and tone.

Using the digital effect

The EMX88S/EMX68S has a built-in digital

effect, allowing reverberation or ambiance to be

added to vocals or instrumental sounds.

1Connect a mic or instrument to the

desired channels, and adjust the volume

and tone.

2Press the DIGITAL EFFECT ON switch of

the DIGITAL EFFECT section.

3Use the PROGRAM selector of the DIGI-

TAL EFFECT section to select the effect

type.

4Raise the EFFECT control of the channels

to which you wish to apply the digital

effect.

5Use the MAIN/MONITOR section EFFECT

RTN control to adjust the level of the

sound processed by the effect.

Note: When connecting a line level device to

channels 1–6 (EMX88S), 1–4 (EMX68S), turn

on the PAD switch.

You cannot use a channel’s Low-Z and Hi-Z

jacks, and MIC and LINE jacks at the same

time.

Note: When turning the power off, reverse this

sequence.

Note: The MONITOR controls are not affected

by the level settings of each channel. This allows

you to create a mix that is independent of the

MAIN section.

Note: If the effect sound is distorted even if the

EFFECT RTN is turned all the way down, lower

the EFFECT controls of each channel.

Using the digital effect 21

EMX88S/EMX68S—Owner’s Manual

* The LED can not blink any faster than an interval of 256 ms (234.3 bpm).

No. Program Description Controllable parameter

Parameter Variable range

REVERB HALL Reverberation simulating a spacious expanse

such as a concert hall. Reverb time 0.3–10.0s

REVERB ROOM Reverberation simulating the acoustics of a small

room. Reverb time 0.3–3.2s

REVERB PLATE Simulation of a plate reverb device. Produces a

hard-sounding reverberation. Reverb time 0.3–10.0s

REVERB VOCAL 1

REVERB VOCAL 2

Ideal reverb for vocals. Reverb time 0.3–10.0s

VOCAL ECHO 1

VOCAL ECHO 2

Ideal echo for vocals. Delay time 0–800ms

DELAY 1

DELAY 2

Delay effect that delays the signal. Delay time 0–800ms

EARLY REF. An effect produced by modifying the early reﬂec-

tions. It lets you add depth to the sound, or create

echo-like effects.

Room size 0.1–10.0

GATE REVERB An effect produced by cutting the reverberation. Room size 0.1–5.0

VOCAL DOUBLER Produces an effect as though two people were

singing. Pitch ﬁne 0–50

SYMPHONIC Gives a richly layered depth to the sound. Depth 0–100%

FLANGE Adds a sense of pitch to the tone. Effective on

sounds that contain numerous overtones. Modulation

frequency 0.05–4.00Hz

DISTORTION The well-known effect used to distort the sound. Drive 0–100

TAP DELAY

This effect sets the delay time to the interval at

which you actually press the switch. The amount of

feedback can be adjusted by the PARAMETER

control. The LED will blink in synchronization with

the delay time.

Feedback gain 0–99%

Delay time 100ms (600bpm)–

2690ms (22.3bpm)*

22 Example setups

EMX88S/EMX68S—Owner’s Manual

Example setups

This section provides some ways in which the EMX88S/EMX68S can be used, and explains connections and

operation.

As a conference PA system/installed sound system

This example shows the EMX88S/EMX68S used as a conference PA system or sound system. A sound mix dif-

ferent from that of the main speakers can be sent to the powered monitor speakers connected to the MONI-

TOR jack.

Connections

• Connect mics to channel input jacks.

• If you wish to use an external device such as a CD

player or LD player, connect the outputs of the

device to the 2TR IN jacks of the EMX88S/

EMX68S.

• If you wish to record the audio from the mics to a

cassette deck, connect the REC OUT jacks of the

EMX88S/EMX68S to the input jacks of the cas-

sette deck.

• Connect the main speakers to the SPEAKERS B1

or 2 jacks and the SPEAKERS A1 or 2 jacks.

• Connect the powered monitor speakers to the

MONITOR jack.

Playing back a CD player

1Turn the power on in the order of periph-

eral devices ➞ EMX88S/EMX68S.

2Adjust the MASTER control of the MAIN

section to the “√√

√√” position.

3Start playback on the CD player, and use

the MAIN section 2TR IN control to adjust

the level so that the 0 LED of the MAIN

section peak level meter does not light.

SPEAKERS B1/2

SPEAKERS A1/2

Set to MAIN L-R

VOL

Powered

monitor

Main Speakers

Microphone Cassette Deck

CD Player

Note: You can connect a stereo playback device,

such as a CD player or an LD player, to channels

7–8 (EMX88S), 5–6 (EMX68S) LINE inputs.

The MIC and LINE inputs of channel 7 can be

used simultaneously but their levels cannot be

separately adjusted. (Same for channel

8 (EMX88S), 6 (EMX68S))

As a band PA 23

EMX88S/EMX68S—Owner’s Manual

As a band PA

Here is an example of using the EMX88S/EMX68S as a small PA for a band. In this example, an external effect

such as delay or reverb is also being used.

Connections

SPEAKERS A

Set to MAIN (L+R) - MON

SPEAKERS B

Main

Speakers

Microphone

Monitor Speakers

Effect Processor

Synthesizer

*1. Although this example shows an external effects pro-

cessor and footswitch, which is used to turn on and off

the built-in digital effects processor, connected to the

EMX88S/EMX68S, in practice, only one effects process-

or, internal or external, will be used at a time, so the

footswitch is not required when using external effects.

Footswitch

(YAMAHA FC5) (TAP)

Footswitch

(YAMAHA FC5) (EFFECT ON/OFF)

Electric-acoustic

guitar

Electric bass

24 Example setups

EMX88S/EMX68S—Owner’s Manual

• Connect mics or instruments, such as keyboards,

to the channel input jacks.

• Connect the main speakers to the SPEAKERS A,

B 1/2 jacks and the monitor speakers.

• If you will be using an external effect such as

delay or reverb, connect the EMX88S/EMX68S’s

EFFECT OUT jack to the input jack of the exter-

nal effect, and connect the output jack of the

external effect to the EMX88S/EMX68S’s AUX IN

jack.

Using an external effect

1Set the EFFECT section EFFECT OUT con-

trol to the “√√

√√” position.

2Raise the EFFECT controls for the channels

to which you want the external effect to

be applied.

3Adjust the input level of the external

effect so that the sound is not distorted at

the input of the external effect.

4Use the MAIN section AUX IN control to

adjust the level of the sound processed by

the effect.

Note: If you are using an external effect, we rec-

ommend that you turn down the EFFECT RTN

controls of the MAIN and MONITOR sections.

If the external effect has a stereo output, it is

possible to connect its output jacks to the LINE

jacks. However in this case, be sure that the

EFFECT controls are turned all the way down

for the channels into which the effect sound is

being input. If the EFFECT controls are raised,

feedback will occur, and your speakers may be

damaged.

Installing an optional rack mount kit 25

EMX88S/EMX68S—Owner’s Manual

Installing an optional rack mount kit

You can rack-mount the EMX88S/EMX68S using

an optional rack mount kit (RK-88).

Rack mount kit RK-88

•Bracket × 2

• Screw × 6

Before you rack-mount the EMX88S/EMX68S,

make sure that sufﬁcient ventilation will be

maintained. (Never install the unit in a sealed

rack.)

If you are going to install multiple devices includ-

ing the unit in a rack, keep a 1U space or more

between the devices. Use a blank panel with holes

for ventilation if you wish to insert a panel

between the devices.

You will need a 7U space to install the rack

mount. After installation, the unit will project

62 mm from the front surface of the rack.

Installing the rack mount bracket

1 Remove the carrying handle by loosening and

removing four screws.

2 Attach one of the rack mount brackets to the side

of the EMX88S/EMX68S using three included

screws.

3 Attach the other rack mount bracket in the same

way.

26 Troubleshooting

EMX88S/EMX68S—Owner’s Manual

Troubleshooting

The following table describes the possible malfunctions of this device, and the appropriate actions to be taken in

each case.

Powered Mixer Q&A

Problem Cause Action

Sound is no

longer out-

put from the

speakers.

The POWER

indicator is lit.

The load on the ampliﬁer of this device

was too great, and the protection cir-

cuit for the amplifier has operated.

Possible reasons for the excessive load

are an excessive level setting in the

channel control section or main section,

insufﬁcient ventilation, or insufﬁcient

load impedance of the connected speak-

ers.

Please wait. When the device cools off, normal

operation will resume automatically. However,

please check the following three points to prevent

the problem from recurring.

•If the level setting is excessive, lower it to the

nominal level. You can refer to the peak level

indicators of the main section when doing so.

•If the device is not ventilated sufﬁciently, refer to

the cautions given at the beginning of this man-

ual and take appropriate measures to insure

adequate ventilation.

•If the load impedance (including a short) is too

low, refer to the chapter on connections (page

15) and change the connections so that the

impedance is correct.

Other

Connections between devices have

come loose. Inspect the connections, and correct any faulty con-

nections.

Other The device may have malfunctioned. Please con-

tact your dealer.

Q: The built-in effect is not effective. A: The ON switch in the DIGITAL EFFECT section may

not be turned on. Or, you have adjusted the EFFECT

control in the Channel section or the EFFECT RTN

control in the MAIN section.

Q: The monitoring sound from the speakers is not power-

ful enough relative to the level of the input sound. A: The equalizer LOW control for each channel may be set

to negative values.

Q: The signal is sent from the EFFECT OUT jack to the

connected effect processor. Then the effect sound is

returned to the AUX IN jack. However, no signal is input

to the mixer.

A: The AUX IN control in the MAIN section may not be

rotated to right.

Q: An external powered speaker is connected to the MON-

ITOR-OUTPUT jack.

However, the signal is not sent to the speaker even

when the MASTER control in the MONITOR section is

turned.

A: The MONITOR controls for input channels may not

have been adjusted.

Q: Can the Low-Z jack and the Hi-Z jack be used at the

same time? A: You cannot use the Low-Z jack and the Hi-Z jack for the

same channel at the same time.

Q: Can a single speaker be connected to the mixer? A: Yes. Use a speaker with an impedance of 4-8 ohms.

Specifications 27

EMX88S/EMX68S—Owner’s Manual

Speciﬁcations

■General speciﬁcations

Maximum output power MAIN L, R: 400 W+400 W/4Ω @0.5% THD at 1 kHz, 270 W+270 W/8Ω @0.5% THD at 1 kHz

MAIN BRIDGE: 800 W/8Ω @0.5% THD at 1 kHz

Frequency response 20 Hz–20 kHz +1 dB, –3 dB @1 W output into 8Ω (SPEAKERS OUT)

20 Hz–20 kHz +1 dB, –3 dB @+4 dB output into 10 kΩ (MAIN OUT, MONITOR OUT, EFFECT OUT)

Total harmonic distortion Less than 0.5% @20 Hz–20 kHz, 200 W output into 4Ω (SPEAKERS OUT)

Less than 0.3% @20 Hz–20 kHz, +14 dB output into 10 kΩ (MAIN OUT, MONITOR OUT, EFFECT OUT)

Hum & noise

(Average, Rs=150Ω)

(with 20 Hz–20 kHz BPF)

–124 dB equivalent input noise, –65 dB residual output noise (SPEAKERS OUT)

–88 dB residual output noise (MAIN OUT, MONITOR OUT)

–79 dB (MAIN OUT) Master level control: nominal level, All channel level controls: minimum

–75 dB (MONITOR OUT) Master level control: nominal level, All channel level controls: minimum

–69 dB (MAIN OUT) Master level control: nominal level, 1 channel level control: nominal level

–84 dB (EFFECT OUT) All channel level controls: minimum

–64 dB (EFFECT OUT) 1 channel level control: nominal level

Maximum voltage gain

86 dB CH IN (Lo-Z) to SPEAKERS OUT

66 dB CH IN (Lo-Z) to MAIN OUT, MONITOR OUT

66 dB CH IN (Lo-Z) to EFFECT OUT

48 dB CH IN (Lo-Z) to REC OUT

56 dB CH IN (Hi-Z) to MAIN OUT, MONITOR OUT

46 dB CH IN (Super Hi-Z) to MAIN OUT

26 dB AUX IN to MAIN OUT

24 dB 2TR IN to MAIN OUT

66 dB MIC IN to MAIN OUT

26 dB LINE IN to MAIN OUT

Crosstalk at 1 kHz 65 dB adjacent input, 65 dB input to output

Input channel equalization

±15 dB Maximum

HIGH 10 kHz shelving

MID 2.5 kHz peaking

LOW 100 Hz shelving

* Turn over/roll-off frequency of shelving: 3 dB below maximum variable level.

Meters 5 POINTS LED METER (MAIN OUT L/R, MONITOR OUT)

Graphic equalizer 7 bands (125, 250, 500, 1k, 2k, 4k, 8k Hz)

±12 dB Maximum (MAIN OUT, MONITOR OUT)

Internal digital effect 16 programs, parameter control, tap delay control

Phantom power +15 V (balanced input)

Limiter Comp. : THD≥0.5% (SPEAKERS OUT)

LIMIT indicators Turns on. : THD≥0.5% (SPEAKERS OUT)

Protection circuit (Power

amp) POWER switch on/off mute, DC detection, TEMP (heatsink temp. ≥90°C)

Fan circuit stop — low speed (50°C) — variable — high speed (70°C)

Foot switch (FC5) DIGITAL EFFECT MUTE : on/off, Tap delay

Optional accessories RK-88, FC5

Power requirement/

Power consumption

USA and Canada 120 V AC 60 Hz/300W

Europe 230 V AC 50 Hz/350W

Other 240 V AC 50 Hz/350W

Dimensions (WxHxD) 482×305×328 mm

Weight 15.5 kg

Supplied accessories AC power cord, Owner’s Manual

28 Specifications

EMX88S/EMX68S—Owner’s Manual

■Input speciﬁcations

■Output speciﬁcations

•All output jacks are unbalanced.

•0 dB=0.775 Vrms, 0 dBV=1 Vrms.

Speciﬁcations are subject to change without prior notice.

For European Model

Purchaser/User Information speciﬁed in EN55103-1 and EN55103-2.

Inrush Current: 75A

Conformed Environment: E1, E2, E3 and E4

Input connectors PAD Actual load

impedance Nominal

impedance

Input level

Connector

type

Sensitivity*1

*1. Sensitivity is the lowest level that can produce an output of +4 dB (1.23 V) or the nominal output level when the unit is set at maximum gain.

(All level controls are at maximum position.)

Nominal level Max. before

clipping

CH INPUT (Low-Z)

(CH1–4/1–6)

OFF 3 kΩ50–600Ω Mics –62 dB (0.616 mV) –50 dB (2.45 mV) –20 dB (77.5 mV) XLR-3-31

type*2

*2. Balanced.

ON 600Ω Lines –32 dB (19.5 mV) –20 dB (77.5 mV) +10 dB (2.45 V)

CH INPUT (Hi-Z)

(CH1–2/1–4)

OFF 10 kΩ50–600Ω Mics –52 dB (1.95 mV) –40 dB (7.75 mV) –10 dB (245 mV) Phone jack

(TRS)*2

ON 600Ω Lines –22 dB (61.6 mV) –10 dB (245 mV) +20 dB (7.75 V)

CH INPUT

(Super Hi-Z)

(CH3–4/5–6)

OFF

470 kΩ1kΩ

–42 dB (6.16 mV) –30 dB (24.5 mV) 0 dB (775 mV)

Phone jack*3

ON –12 dB (195 mV) 0 dB (775 mV) +10 dB (3.16 V)

MIC INPUT 3 kΩ50–600Ω Mics –62 dB (0.616 mV) –50 dB (2.45 mV) –20 dB (77.5 mV) XLR-3-31 type*2

LINE INPUT (L, R) 10 kΩ600Ω Line –22 dB (61.6 mV) –10 dB (245 mV) +20 dB (7.75 V) Phone jack*3

*3. Unbalanced.

•0 dB=0.775 Vrms, 0 dBV=1 Vrms.

AUX IN (L, R) 10 kΩ600Ω Line –22 dB (61.6 mV) –10 dB (245 mV) +20 dB (7.75 V) Phone jack*3

2TR IN (L, R) 10 kΩ600Ω Line –22 dBV (79.4 mV) –10 dBV (316 mV)

+17.8 dBV (7.76 V)

Phono jack

Output connectors Actual source

impedance Nominal

impedance

Output level Connector

type

Nominal Max. before clipping

SPEAKERS OUT A, B (1, 2) 0.1Ω4/8Ω Speaker 80 W/4Ω(400 W/4Ω) Phone jack

BRIDGE 0.1Ω8Ω Speaker 160 W/8Ω(800 W/8Ω) Phone jack

MAIN OUT (L, R) 600Ω10 kΩ Lines +4 dB (1.23 V) +20 dB (7.75 V) Phone jack

EFFECT OUT 600Ω10 kΩ Lines +4 dB (1.23 V) +20 dB (7.75 V) Phone jack

MONITOR OUT 600Ω10 kΩ Lines +4 dB (1.23 V) +20 dB (7.75 V) Phone jack

REC OUT (L, R) 600Ω10 kΩ Lines –10 dBV (316 mV) +10 dBV (3.16 V) Phono jack

Dimensions 29

EMX88S/EMX68S—Owner’s Manual

■Dimensions

482

305

328

Unit: mm

30 Specifications

EMX88S/EMX68S—Owner’s Manual

■Block and Level diagram

CH INPUT

(CH1-2)

(CH1-4)

CH INPUT

(CH3-4)

(CH5-6)

CH INPUT

(CH5-6)

(CH7-8)

Hi-Z

[–40/–10dB]

Low-Z

[–50/–20dB]

Low-Z

[–50/–20dB]

LINE

[–10dB]

MIC

[–50dB]

L/MONO

Super Hi-Z

[–30/0dB]

PHANTOM OFF

ON +15V

PAD

(30dB)

PAD

(30dB)

[–10dB]

INV

STAND-BY

(CH1-6)

(CH1-8)

LED METER (5 point)

INV

SUM

SUM SUM

SUM

SUM SUM

SUM

INV

SUM

3-Stage EQ

Mid

3-Stage EQ

Mid

[–10dB]

LEVEL PAN

EFFECT

MONITOR

LEVEL

[–16dB]

[–6dB]

PAN

EFFECT

MONITOR

BAL

[–16dB]

[–6dB]

REC OUT

[–10dBV]

[–7.8dB]

[–6dB]

[–12dB]

EFF RTN

EFF RTN[–12dB]

[–16dB]

[0dB]

[0dB] MASTER

MASTER

[+4dB]

[0dB]

[–6dB]

[0dB]

AUX IN

2TR IN

[–10dBV]

[–7.8dB]

[–13.8dB]

FOOT SW

PARAMETER

PROGRAM

TAP SW

TAP

[–10dB]

DIGITAL

EFFECT

MAIN L

MAIN R

EFFECT

MONITOR

MAIN L (NON-MUTE)

MAIN R (NON-MUTE)

MONITOR (NON-MUTE)

DIGITAL EFFECT ON

7-Stage GEQ

125Hz

250Hz

500Hz

1kHz

2kHz

4kHz

8kHz

125Hz

250Hz

500Hz

1kHz

2kHz

4kHz

8kHz

125Hz

250Hz

500Hz

1kHz

2kHz

4kHz

8kHz

MAIN L

[+4dB]

SPEAKERS OUT

MAIN R

[+4dB]

MONITOR

[+4dB]

EFF OUT

[+4dB]

YSP ON/OFF

MONO BRIDGE

MONO

MAIN (L+R)-MON

STEREO

MONO (BRIDGE)

LIMITER

A [400W/4Ω]

BRIDGE [800W/8Ω]

B [400W/4Ω]

+40dB

+30dB

+20dB

+10dB

0dB

–10dB

–20dB

–30dB

–40dB

–50dB

Clip Level [+20dB]

2TR IN [–10dBV]

AUX IN [–10dB]

Super Hi-Z PAD:ON [0dB]

LINE IN

[–10dB]

Lo-Z PAD:ON [–20dB]

Lo-Z PAD:OFF [–50dB]

MIC [–50dB]

Super Hi-Z [–30dB]

Hi-Z PAD:ON [–10dB]

Hi-Z PAD:OFF [–40dB]

AUX, 2TR [0dB]

MAIN [0dB]

MONITOR [–16dB]

LEVEL

EFFECT [–6dB]

MAIN OUT [+4dB]

MONITOR OUT [+4dB]

EFFECT OUT [+4dB]

REC OUT [–10dBV]

+40dB

+30dB

+20dB

+10dB

0dB

–10dB

–20dB

MAXIMUM OUTPUT POWER

[400W/4Ω]

SPEAKERS OUT (80W/4Ω)

YAMAHA CORPORATION

V832100 R0 1 AP 32 Pro Audio & Digital Musical Instrument Division

P.O. Box 3, Hamamatsu, 430-8651, Japan

NP Printed in Taiwan

Yamaha Ems 68S Owners Manual EMX88S/68S_E

Ems-68S-Owners-Manual yamaha-ems-68s-owners-manual-133372

EMS 68S to the manual 75213731-5093-4866-a843-4777af4c0d86

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