Meyer Sound Car Speaker Acheron Designer Screen Channel Loudspeaker Users Manual Operating Instructions

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OPERATING INSTRUCTIONS

Acheron® Designer Screen Channel Loudspeaker



ii

DECLARATION OF CONFORMITY ACCORDING TO ISO/IEC GUIDE 22 AND EN 45014

© 2012 

Meyer Sound. All rights reserved.

Acheron Designer Operating Instructions, PN 05.211.005.01 A

The contents of this manual are furnished for informational purposes only, are subject to change without notice, and should not be con-

strued as a commitment by Meyer Sound Laboratories Inc. Meyer Sound assumes no responsibility or liability for any errors or inaccura-

cies that may appear in this manual. Except as permitted by applicable copyright law, no part of this publication may be reproduced,

stored in a retrieval system, or transmitted, in any form or by any means, electronic, mechanical, recording or otherwise, without prior writ-

ten permission from Meyer Sound.

EXP, Intelligent AC, MAPP Online Pro, RMS, QuietCool, and all alpha-numeric designations for Meyer Sound products and accessories are

trademarks of Meyer Sound. Acheron Designer, Compass, Galileo, Meyer Sound, the Meyer Sound wave logo, and SIM are registered

trademarks of Meyer Sound Laboratories Inc. (Reg. U.S. Pat. & Tm. Off.). All third-party trademarks mentioned herein are the property of

their respective trademark holders.

Manufacturer’s Name: Meyer Sound Laboratories Inc.

Manufacturer’s Address: 2832 San Pablo Avenue

Berkeley, CA 94702-2204, USA

Declares that the product:

Product Names: Acheron Designer Screen Channel Loudspeaker System

Product Options: All

Conforms to the following Product Specifications:

Safety: EN 60065:2002

Supplementary Information: The product herewith complies with the requirements of the Low Voltage

Directive (LVD) 2006/95/EC and the EMC Directive 2004/108/EC.

Signature:

Ms. Margie Garza

Director of Quality

Meyer Sound Laboratories Inc.

Berkeley, California 94702 USA

Issued October 13, 2011

European Contact:

Your local Meyer Sound dealer or

Meyer Sound Germany, GmbH.

iii

SYMBOLS USED

These symbols indicate important safety or operating features in this booklet and on the chassis:

IMPORTANT SAFETY INSTRUCTIONS

1. Read these instructions.

2. Keep these instructions.

3. Heed all warnings.

4. Follow all instructions.

5. Do not use this loudspeaker near water.

6. Clean only with dry cloth.

7. Do not block any ventilation openings. Install in accor-

dance with Meyer Sound’s installation instructions.

8. Do not install near any heat sources such as radiators,

heat registers, stoves, or other apparatus that produce

heat.

9. Do not defeat the safety purpose of the grounding-type

plug. A grounding type plug has two blades and a third

grounding prong. The third prong is provided for your

safety. If the provided plug does not fit into your outlet,

consult an electrician for replacement of the obsolete

outlet.

10.Protect the power cord from being walked on or pinched,

particularly at plugs, convenience receptacles, and the

point where they exit from the loudspeaker. The AC

mains plug or appliance coupler shall remain readily

accessible for operation.

11.Only use attachments/accessories specified by Meyer

Sound.

12.If applicable, use only with the caster rails or rigging

specified by Meyer Sound, or sold with the loudspeaker.

Handles are for carrying only.

CAUTION: Rigging should only be done by

experienced professionals.

13.Unplug this loudspeaker during lightning storms or when

unused for long periods of time.

14.Disconnect the mains plug before disconnecting the

power cord from the loudspeaker.

15.Refer all servicing to qualified service personnel. Servic-

ing is required when the loudspeaker has been damaged

in any way, such as when the power-supply cord or plug

has been damaged; liquid has been spilled or objects

have fallen into the loudspeaker; rain or moisture has

entered the loudspeaker; the loudspeaker has been

dropped; or when for undetermined reasons the loud-

speaker does not operate normally.

CAUTION: To reduce the risk of electric shock,

do not expose this loudspeaker to rain or mois-

ture. Do not install the loudspeaker in wet or humid

locations without using weather protection equip-

ment from Meyer Sound.

Dangerous voltages: risk of

electric shock

Important operating instructions Frame or chassis Protective earth ground

Pour indiquer les risques

résultant de tensions dangereuses

Pour indequer important

instructions

Masse, châssis Terre de protection

Warnung vor gefährlicher

elektrischer Spannung

Wichtige Betriebsanweisung oder

Gebrauchsanleitung

Rahmen oder Gehäuse Masse Schutzleiter

Para indicar voltajes peligrosos Instrucciones importantes de

funcionamiento y/o manteniento

Armadura o chassis Tierra proteccionista

!

!

!

iv

SAFETY SUMMARY

English

To reduce the risk of electric shock, dis-

connect the loudspeaker from the AC

mains before installing audio cable.

Reconnect the power cord only after

making all signal connections.

Connect the loudspeaker to a two-pole,

three-wire grounding mains receptacle.

The receptacle must be connected to a

fuse or circuit breaker. Connection to

any other type of receptacle poses a

shock hazard and may violate local

electrical codes.

Do not install the loudspeaker in wet or

humid locations without using weather

protection equipment from Meyer

Sound.

Do not allow water or any foreign object

to get inside the loudspeaker. Do not

put objects containing liquid on or near

the unit.

To reduce the risk of overheating the

loudspeaker, avoid exposing it to direct

sunlight. Do not install the unit near

heat-emitting appliances, such as a

room heater or stove.

This loudspeaker contains potentially

hazardous voltages. Do not attempt to

disassemble the unit. The unit contains

no user-serviceable parts. Repairs

should be performed only by factory-

trained service personnel.

Français

Pour réduire le risque d’électrocution,

débrancher la prise principale de l’haut-

parleur, avant d’installer le câble d’inter-

face allant à l’audio. Ne rebrancher le

bloc d’alimentation qu’après avoir

effectué toutes les connections.

Branchez l’haut-parleur dans une prise

de courant à 3 dérivations (deux pôles

et la terre). Cette prise doit être munie

d’une protection adéquate (fusible ou

coupe-circuit). Le branchement dans

tout autre genre de prise pourrait

entraîner un risque d’électrocution et

peut constituer une infraction à la régle-

mentation locale concernant les instal-

lations électriques.

Ne pas installer l’haut-parleur dans un

endroit où il y a de l’eau ou une

humidité excessive.

Ne pas laisser de l’eau ou tout objet

pénétrer dans l’haut-parleur. Ne pas

placer de r´cipients contenant un liquide

sur cet appareil, ni à proximité de celui-

ci.

Pour éviter une surchauffe de l’haut-

parleur, conserver-la à l’abri du soleil.

Ne pas installer à proximité d’appareils

dégageant de la chaleur tels que radia-

teurs ou appareils de chauffage.

Ce haut-parleur contient des circuits

haute tension présentant un danger. Ne

jamais essayer de le démonter. Il n’y a

aucun composant qui puisse être

réparé par l’utilisateur. Toutes les répa-

rations doivent être effectuées par du

personnel qualifié et agréé par le con-

structeur.

Deutsch

Um die Gefahr eines elektrischen

Schlages auf ein Minimum zu reduzie-

ren, den Lautsprecher vom Stromnetz

trennen, bevor ggf. ein Audio-Schnitt-

stellensignalkabel angeschlossen wird.

Das Netzkabel erst nach Herstellung

aller Signalverbindungen wieder ein-

stecken.

Der Lautsprecher an eine geerdete

zweipolige Dreiphasen-Netzsteckdose

anschließen. Die Steckdose muß mit

einem geeigneten Abzweigschutz

(Sicherung oder Leistungsschalter) ver-

bunden sein. Der Anschluß der unter-

brechungsfreien Stromversorgung an

einen anderen Steckdosentyp kann zu

Stromschlägen führen und gegen die

örtlichen Vorschriften verstoßen.

Der Lautsprecher nicht an einem Ort

aufstellen, an dem sie mit Wasser oder

übermäßig hoher Luftfeuchtigkeit in

Berührung kommen könnte.

Darauf achten, daß weder Wasser noch

Fremdkörper in das Innere den

Lautsprecher eindringen. Keine

Objekte, die Flüssigkeit enthalten, auf

oder neben die unterbrechungsfreie

Stromversorgung stellen.

Um ein Überhitzen dem Lautsprecher

zu verhindern, das Gerät vor direkter

Sonneneinstrahlung fernhalten und

nicht in der Nähe von wärmeabstrahlen-

den

Haushaltsgeräten (z.B. Heizgerät oder

Herd) aufstellen.

Im Inneren diesem Lautsprecher herr-

schen potentiell gefährliche Spannun-

gen. Nicht versuchen, das Gerät zu öff-

nen. Es enthält keine vom Benutzer

reparierbaren Teile. Reparaturen dürfen

nur von ausgebildetem Kundenienst-

personal durchgeführt werden.

Español

Para reducir el riesgo de descarga eléc-

trica, desconecte de la red de voltaje el

altoparlante antes de instalar el cable

de señal de audio. Vuelva a conectar la

alimentacion de voltaje una vez efec-

tuadas todas las interconexiones de

señalizacion de audio.

Conecte el altoparlante a un tomacorri-

ente bipolar y trifilar con neutro de

puesta a tierra. El tomacorriente debe

estar conectado a la protección de deri-

vación apropiada (ya sea un fusible o un

disyuntor). La conexión a cualquier otro

tipo de tomacorriente puede constituir

peligro de descarga eléctrica y violar los

códigos eléctricos locales.

No instale el altoparlante en lugares

donde haya agua o humedad excesiva.

No deje que en el altoparlante entre

agua ni ningún objeto extraño. No

ponga objetos con líquidos encima de

la unidad ni cerca de ella.

Para reducir el riesgo de sobrecalenta-

miento, no exponga la unidad a los

rayos directos del sol ni la instale cerca

de artefactos que emiten calor, como

estufas o cocinas.

Este altoparlante contiene niveles de

voltaje peligrosos en potencia. No

intente desarmar la unidad, pues no

contiene piezas que puedan ser repar-

das por el usuario. Las reparaciones

deben efectuarse únicamente por parte

del personal de mantenimiento capac-

itado en la fábrica.

v

CONTENTS

Chapter 1: Introduction 7

How to Use This Manual 7

Acheron Designer Screen Channel Loudspeaker 7

Chapter 2: Power Requirements 9

AC Connectors 9

Wiring for AC Connections 10

AC Power Distribution 10

Acheron Designer Voltage Requirements 11

Powering Up the Acheron Designer 11

Acheron Designer Current Requirements 11

Electrical Safety Guidelines 12

Chapter 3: Amplification and Audio 13

Audio Connectors 13

Limiting 14

On/Status LED 15

Chapter 4: Rigging 17

MYA-DES Cradle-Style Yoke 17

Chapter 5: RMS Remote Monitoring System 19

RMS Software 19

RMS Module 20

Neuron ID for the RMS Module 21

Resetting the RMS Module 21

Chapter 6: System Design and Integration Tools 23

MAPP Online Cinema 23

SIM 3 Measurement System 24

Appendix A: Acheron Designer Specifications 25

CONTENTS

vi

7

CHAPTER 1: INTRODUCTION

HOW TO USE THIS MANUAL

Make sure to read these operating instructions in their

entirety before configuring a loudspeaker system with

Acheron Designer loudspeakers. In particular, pay close

attention to material related to safety issues.

As you read these operating instructions, you will encounter

the following icons for notes, tips, and cautions:

NOTE: A note identifies an important or useful

piece of information relating to the topic under

discussion.

TIP: A tip offers a helpful tip relevant to the topic

at hand.

CAUTION: A caution gives notice that an

action may have serious consequences and

could cause harm to equipment or personnel, and

could cause delays or other problems.

Information and specifications are subject to change.

Updates and supplementary information are available at

www.meyersound.com.

Meyer Sound Technical Support is available at:

■Tel: +1 510 486.1166

■Tel : +1 510 486.0657 (after hours support)

■Web: www.meyersound.com/support

■Email: techsupport@meyersound.com

ACHERON DESIGNER SCREEN CHANNEL

LOUDSPEAKER

At the heart of Meyer Sound's EXP line of cinema products

are the Acheron® high-performance screen channel loud-

speakers. The Acheron Designer is the most compact of the

Acheron models, making it an excellent choice for sound

design suites, screening rooms, private theatres, and small

commercial theatres. Optimized for installation behind per-

forated screens, the Acheron Designer combines the advan-

tages of self-powered technology and innovative horn

design to deliver exceptional, precise coverage for the left,

center, and right screen channels for cinema.

The Acheron Designer uses the same patent-pending horn

technology and high-frequency compression driver as the

other Acheron models, delivering the same 38 Hz to 17 kHz

frequency response. This consistency of fidelity between

Acheron models ensures that soundtracks monitored with

the Acheron Designer translate accurately when played

back in larger rooms with the Acheron 100, Acheron 80,

Acheron Studio, or other calibrated cinema system.

!

Acheron Designer (without Optional Grille Frame)

CHAPTER 1: INTRODUCTION

8

Designed specifically for cinema, the Acheron horn features

a very soft roll-off beyond its 80-degree horizontal by 50-

degree vertical coverage pattern. The extremely well-

behaved horn ensures an accurate acoustic crossover and

consistent vertical coverage pattern through the critical

crossover range between the low- and high-frequency driv-

ers. The optimized crossover point places most of the dialog

in the horn, which is ideal for cinema applications.

Designed and manufactured at Meyer Sound's headquar-

ters in Berkeley, California, the Acheron Designer’s drivers

include one 12-inch low-frequency cone driver, housed in an

optimally tuned, ported enclosure, and one high-frequency

4-inch diaphragm compression driver. The drivers yield

uncompromising quality and are powered by sophisticated

onboard amplification. The self-powered design ensures

consistent results and simplifies installations in both new

and existing rooms.

A proprietary two-channel, Class-D amplifier powers each

driver channel independently. Onboard processing includes

driver protection circuitry, an electronic crossover, and cor-

rection filters, ensuring flat frequency and phase responses.

The rear-mounted, recessed heat sink yields efficient con-

vection cooling, and allows the unit to be placed flat against

walls, when necessary.

The optional RMS™ remote monitoring system provides

comprehensive monitoring of system parameters on a

Windows®-based computer.

The Acheron Designer enclosure is constructed of premium

birch plywood and coated with a low-gloss, black-textured

finish. The cabinet bottom is fitted with two threaded M6

attachment points for the optional MYA-DES cradle-style

yoke, allowing the unit to be suspended from a single hang-

ing point.

An optional, black cloth grille frame update kit is available

for installations where the Acheron Designer is not placed

behind a screen.

Acheron Designer with Recessed Heat Sink

Acheron Designer with Optional MYA-DES Cradle-Style Yoke

Acheron Designer with Optional Grille Frame

9

CHAPTER 2: POWER REQUIREMENTS

The Acheron Designer combines advanced loudspeaker

technology with equally advanced power capabilities.

Understanding power distribution, voltage and current

requirements, and electrical safety guidelines is critical to

the safe operation of the Acheron Designer.

AC CONNECTORS

The Acheron Designer user panel includes 3-pole, Power-

Con AC connectors.

AC Input Connector (Blue)

The blue AC Input connector supplies power to the

Acheron Designer loudspeaker. The connector is rated at

20 amps and uses a PowerCon3 AC mains locking connec-

tor that prevents accidental disconnections. A 10-foot AC

power cable, rated at 15 amps, is included with each

Acheron Designer. If you replace the included AC power

cable, make sure to use a cable with the appropriate power

plug (on the other end) for the region in which you will oper-

ate the unit.

The AC Input connector also supplies power to any addi-

tional loudspeakers connected to the Acheron Designer’s

gray Loop Output connector. Each Acheron Designer loud-

speaker requires approximately 3.24 A rms maximum at

115 V AC and 1.74 A rms maximum at 230 V AC for proper

operation.

CAUTION: When using the included AC power

cable, do not loop more than three additional

Acheron Designers from the AC Loop Output con-

nector at 115 V (four total for the circuit), and not

more than seven at 230 V (eight total for the circuit).

AC Loop Output Connector (Gray)

The gray AC Loop Output connector allows multiple

Acheron Designers to be looped and powered from a single

power source. Connect the AC Loop Output of the first

Acheron Designer to the AC Input of the second unit, and so

forth. The AC Loop Output uses a PowerCon3 AC mains lock-

ing connector that prevents accidental disconnections.

The maximum number of loudspeakers that can be looped

from the Loop Output connector is determined by the volt-

age of the power source, the current draw of the looped

loudspeakers, the circuit breaker rating, and the rating of the

AC power cable connected to Acheron Designer.

NOTE: The Acheron Designer current draw is

dynamic and fluctuates as operating levels

change. The numbers in Table 1 assume that operat-

ing levels are normal and not such that the loud-

speakers are constantly limiting.

Each Acheron Designer ships with one AC looping connec-

tor for making AC looping cables. Assembled AC looping

cables are available from Meyer Sound.

CAUTION: Do not exceed the current capabil-

ity of the 20-amp Input connector for the

Acheron Designer. When looping loudspeakers, con-

sider the total current draw for all loudspeakers on

the circuit, including the first loudspeaker.

AC Input (Left) and AC Loop Output (Right) Connectors

AC LOOP

OUTPUT

100-240V

~

50-60 Hz

8A MAX

Class 1 Wiring

AC INPUT

RATING

100-240V

~

50-60 Hz

4A MAX

DO NOT

DISCONNECT

UNDER LOAD

Made in USA with domestic and foreign partswww.meyersound.com

COMMERCIAL

AUDIO SYSTEM

3JKB

!

Table 1: Maximum Number of Acheron Designers that Can Be

Looped with AC Power

Circuit Breaker/

Connector Rating

115 V AC 230 V AC 100 V AC

15 amps 3 looped

(4 total)

7 looped

(8 total)

2 looped

(3 total)

20 amps 5 looped

(6 total)

10 looped

(11 total)

3 looped

(4 total)

!

CHAPTER 2: POWER REQUIREMENTS

10

WIRING FOR AC CONNECTIONS

The Acheron Designer requires a grounded outlet. To oper-

ate safely and effectively, it is extremely important that the

entire system be properly grounded.

When wiring international or special-purpose AC power

cables and connectors, use the following wiring scheme:

■Connect the blue wire to the black terminal, or the termi-

nal marked with an N.

■Connect the brown wire to the red terminal, or the termi-

nal marked with an L.

■Connect the yellow and green wire to the green (or green

and yellow) terminal, or the terminal marked with an E.

CAUTION: When creating AC power cables

and distribution systems, it is important to pre-

serve AC line polarity and connect the earth ground

on both ends of the cable. The Acheron Designer

requires a grounded connection. Always use a

grounded outlet and plug. It is extremely important

that the system be properly grounded to operate

safely and properly. Do not ground-lift the AC cable.

AC POWER DISTRIBUTION

All components in an audio system (self-powered loud-

speakers, mixing consoles, and processors) must be prop-

erly connected to an AC power distribution system to ensure

that AC line polarity is preserved, and that all grounding

points are connected to a single node or common point

using the same cable gauge as the neutral and line cables.

NOTE: Improper grounding of connections

between loudspeakers and the rest of the

audio system may produce noise or hum, or cause

serious damage to the input and output stages of the

system’s electronic components.

CAUTION: Before applying AC power to any

Meyer Sound self-powered loudspeaker, make

sure that the voltage potential difference between the

neutral and earth-ground lines is less than 5 V AC

when using single-phase AC wiring.

Figure 1 illustrates a basic three-phase AC distribution sys-

tem with the loudspeaker load distributed across the three

phases. All loudspeakers are connected to common neutral

and earth-ground lines.

AC Cable Wiring Scheme

Blue = neutral

Brown = hot

Yellow/green =

earth ground

(chassis)

!

Figure 1: AC Power Distribution System

!

Line 1 Line 2 Line 3 Neutral

Earth Ground

ACHERON DESIGNER OPERATING INSTRUCTIONS

11

ACHERON DESIGNER VOLTAGE

REQUIREMENTS

The Acheron Designer operates safely and continuously

when the AC voltage stays within 100–264 V AC at 50 or

60 Hz. The loudspeaker can withstand continuous voltages

up to 275 volts and allows any combination of voltage to

GND (neutral-line-ground or line-line-ground).

If the voltage drops below 90 V (brownout), the unit uses

stored power to continue operating temporarily; the loud-

speaker shuts down if the voltage does not rise above the

low boundary before the stored power is used.

If the voltage rises above 275 V, the power supply immedi-

ately shuts off to prevent damage to the unit.

If the Acheron Designer shuts down due to either low or high

voltage, its power supply automatically powers up again

after three seconds, so long as the voltage has returned to

its normal operating window. If the Acheron Designer does

not power up after 10 seconds, remove AC power immedi-

ately and contact Meyer Sound Technical Support.

CAUTION: The power source for the

Acheron Designer should always operate

within the required voltage range, at least a few volts

from the upper and lower ranges. This ensures that

AC voltage variations from the service entry — or

peak voltage drops due to cable runs — will not

cause the loudspeaker’s amplifier to cycle on and off

or cause damage to the power supply.

NOTE: When voltage fluctuates within the

Acheron Designer’s operating range, automatic

tap selection stabilizes the operating voltage. This

tap selection is instantaneous with no audible arti-

facts.

TIP: Since the Acheron Designer does not

require a dedicated neutral line, and it can toler-

ate elevated voltages from the ground line, it can be

connected to line-line terminals in 120 V, 3-phase

Wye systems. This results in 208 V AC between lines

(nominal) and therefore draws less current than when

using 120 V AC (line-neutral). Make sure that the volt-

age remains within the Acheron Designer’s recom-

mended operating window (100-264 V AC). The

ground line must always be used for safety reasons

and the line-to-ground voltage should never exceed

264 V AC (typically 120 V AC from line-to-ground).

POWERING UP THE ACHERON DESIGNER

When AC power is applied to the Acheron Designer, its

Intelligent AC™ power supply automatically selects the cor-

rect operating voltage, allowing it to be used internationally

without manually setting voltage switches. In addition,

Intelligent AC provides soft-start power up, eliminating high

inrush currents; suppresses high-voltage transients up to

several kilovolts; filters common mode and differential mode

radio frequencies (EMI); and sustains operation temporarily

during low-voltage periods.

When powering up the Acheron Designer, the following

startup events take place over several seconds.

1. Audio output is muted.

2. Voltage is detected and the power supply mode is auto-

matically adjusted as necessary. The power supply

ramps up.

3. During the power up sequence, the three-color On/Sta-

tus LED flashes all three colors.

4. After the power up sequence and system check have

completed, the ON/Status LED turns solid green, indicat-

ing the loudspeaker is ready to reproduce audio.

CAUTION: If the On/Status LED does not turn

green, or the Acheron Designer does not out-

put audio after ten seconds, remove AC power imme-

diately and verify that the voltage is within the

required range. If the problem persists, contact

Meyer Sound Technical Support.

ACHERON DESIGNER CURRENT

REQUIREMENTS

The Acheron Designer current draw is dynamic and fluctu-

ates as operating levels change. Since different cables and

circuit breakers heat up at varying rates, it is important to

understand the following types of current ratings and how

they affect circuit breaker and cable specifications.

■Idle Current — The maximum rms current during idle

periods.

■Maximum Long-Term Continuous Current — The

maximum rms current during a period of at least 10 sec-

onds. The Maximum Long-Term Continuous Current is

used to calculate temperature increases for cables, to

ensure that cable sizes and gauges conform to electrical

code standards. The current rating is also used as a rat-

ing for slow-reacting thermal breakers.

!

!

CHAPTER 2: POWER REQUIREMENTS

12

■Burst Current — The maximum rms current during a

period of around one second. The Burst Current is used

as a rating for magnetic breakers. It is also used for cal-

culating the peak voltage drop in long AC cable runs

according to the following formula:

V pk (drop) = I pk x R (cable total)

The Burst Current can also be used to calculate the AC

looping capability of Acheron Designer.

■Ultimate Short-Term Peak Current — A rating for fast-

reacting magnetic breakers.

■Inrush Current — The spike of initial current encoun-

tered when powering on.

You can use Table 2 as a guideline for selecting cable

gauges and circuit breaker ratings for the system’s operat-

ing voltage.

The minimum electrical service amperage required by an

Acheron Designer loudspeaker system is the sum of the

Maximum Long-Term Continuous Current for each loud-

speaker. An additional 30 percent above the minimum

amperage is recommended to prevent peak voltage drops at

the service entry.

NOTE: For best performance, the AC cable

voltage drop should not exceed 10 V, or

10 percent at 115 V and 5 percent at 230 V. Make

sure that even with AC voltage drops that the AC

voltage always remains within the operating win-

dows.

ELECTRICAL SAFETY GUIDELINES

Pay close attention to these important electrical and safety

guidelines.

■The Acheron Designer requires a grounded outlet.

Always use a grounded outlet and plug.

■Do not use a ground-lifting adapter or cut the AC cable

ground pin.

■Do not exceed the current capability of the 20-amp AC

Input connector for the loudspeaker. When looping loud-

speakers, consider the total current draw for all loud-

speakers on the circuit, including the first loudspeaker.

■Make sure the AC power cable for the loudspeaker has

the appropriate power plug (on the other end) for the

area in which you will operate the loudspeaker. In addi-

tion, the AC power cable must be rated for the total cur-

rent draw of all loudspeakers looped from the power

source.

■Do not operate the unit if its power cable is frayed or bro-

ken.

■Keep all liquids away from the Acheron Designer to avoid

hazards from electrical shock.

Table 2: Acheron Designer Current Draw

Current Draw 115 V AC 230 V AC 100 V AC

Idle Current 0.23 A rms 0.19 A rms 0.24 A rms

Maximum Long-Term

Continuous Current

1.58 A rms 0.83 A rms 1.78 A rms

Burst Current 3.1 A rms 1.4 A rms 3.6 A rms

Ultimate Short-Term

Peak Current

12.0 A peak 8.0 A peak 12.4 A peak

Inrush Current 25 A peak 54 A peak 20 A peak

Earth ground

Chassis ground

13

CHAPTER 3: AMPLIFICATION AND AUDIO

The Acheron Designer’s low- and high-frequency drivers are

powered by an extremely efficient onboard two-channel,

Class-D amplifier that uses minimal AC power when idle.

Internal signal processing includes a complex crossover, fre-

quency and phase correction, and limiters that prevent

driver overexcursion and regulate voice coil temperatures,

ensuring maximum driver lifespan.

The Acheron Designer rear panel includes a slot for the

optional RMS module, used for connecting to the RMS

remote monitoring system (see Chapter 5, “RMS Remote

Monitoring System”).

AUDIO CONNECTORS

The Acheron Designer includes female XLR Input and male

XLR Loop output connectors.

Input Connector

The female XLR Input connector accepts a balanced audio

signal with an input impedance of 10 kOhm. The connector

uses the following wiring:

■Pin 1 — 1 kOhm to chassis and earth ground (ESD

clamped)

■Pin 2 — Signal (+)

■Pin 3 — Signal (–)

■Case — Earth (AC) ground and chassis

Pins 2 and 3 carry the input as a differential signal. Pin 1 is

connected to earth through a 1 kOhm, 1000 pF, 15 V

clamped network. This circuitry provides virtual ground lift

for audio frequencies while allowing unwanted signals to

bleed to ground. Make sure to use standard, balanced XLR

audio cables with all three pins connected on both ends.

Telescopic grounding is not recommended, and shorting an

input connector pin to the case may cause a ground loop,

resulting in hum.

TIP: If unwanted noise or hiss is produced by

the loudspeaker, disconnect its input cable. If

the noise stops, there is most likely nothing wrong

with the loudspeaker. To locate the source of the

noise, check the audio cable, source audio, and AC

power.

Acheron Designer Rear Panel with Optional RMS Module

AC LOOP

OUTPUT

100-240V~

50-60 Hz

8A MAX

Class 1 Wiring

AC INPUT

RATING

100-240V~

50-60 Hz

4A MAX

Looping Audio Input

10k Balanced

Limit

On / Status

2

3

1

Earth/Chassis

GND Circuit

1k

Loop

Input

DO NOT

DISCONNECT

UNDER LOAD

Made in USA with domestic and foreign partswww.meyersound.com

AVIS

RISQUE DE CHOC

ELECTRIQUE

NE PAS OUVRIR

CAUTION

RISK OF

ELECTRIC SHOCK

DO NOT OPEN

COMMERCIAL

AUDIO SYSTEM

3JKB

Wink

Activity

Identify

Remote Mute

Disable Enable

RMS Network

NID: 001848623900

RMS 4.0

Firmware

Acheron Designer Audio Connectors, Input and Loop Output

Looping Audio Input

10k Balanced

Limit

On / Status

2

3

1

Earth/Chassis

GND Circuit

1k

Loop

Input

CHAPTER 3: AMPLIFICATION AND AUDIO

14

Loop Output Connector

The male XLR Loop output connector allows multiple

Acheron Designers to be looped from a single audio source.

For applications that require multiple Acheron Designers,

connect the Loop output of the first unit to the Input of the

second, and so forth.

NOTE: The order in which loudspeakers are

connected when looping audio signals is unim-

portant. The Loop connector is wired in parallel to the

Input connector and transmits the unbuffered source

signal even when the Acheron Designer is powered

off.

To avoid distortion when looping multiple Acheron Designers,

make sure the source device can drive the total load imped-

ance of the looped loudspeakers. In addition, the source

device must be capable of delivering approximately 20 dBV

(10 V rms into 600 ohms) to yield the maximum peak SPL

over the entire operating bandwidth of the loudspeakers.

Most professional audio equipment can transmit these

source levels.

To calculate the load impedance for the looped loudspeak-

ers, divide 10 kOhms (the input impedance for a single

Acheron Designer) by the number of looped loudspeakers.

For example, the load impedance for 10 Acheron Designer

loudspeakers is 1000 ohms (10 kOhms / 10). To drive this

number of looped loudspeakers, the source device should

have an output impedance of 100 ohms or less. This same

rule applies when looping Acheron Designer loudspeakers

with other self-powered Meyer Sound loudspeakers and

subwoofers.

NOTE: Most source devices are capable of

driving loads no smaller than 10 times their

output impedance.

CAUTION: Make sure that all cabling for

looped loudspeakers is wired correctly (Pin 1

to Pin 1, Pin 2 to Pin 2, and so forth) to prevent the

polarity from being reversed. If one or more loud-

speakers in a system have reversed polarity, fre-

quency response and coverage will be significantly

degraded.

LIMITING

When source levels for the Acheron Designer exceed opti-

mum input levels for its drivers, limiting is engaged and is

indicated by the two Limit LEDs on the rear panel. The bot-

tom LED indicates limiting for the low-frequency channel.

The top LED indicates limiting for the high-frequency chan-

nel. When engaged, limiting not only protects the drivers,

but also prevents signal peaks from causing excessive dis-

tortion in the amplifier’s channels, thereby preserving head-

room and maintaining smooth frequency responses at high

levels. When source levels return to normal, below the lim-

iter’s threshold, limiting ceases.

The Acheron Designer performs within its acoustical specifi-

cations at normal temperatures when the Limit LEDs are

unlit, or if the LEDs are lit for two seconds or less and then

turn off for at least one second. If an LED remains lit for lon-

ger than three seconds, the loudspeaker enters hard limiting

where:

■Increases to the input level have no effect.

■Distortion increases due to clipping and nonlinear driver

operation.

■The drivers are subjected to excessive heat and excur-

sion, which will compromise their life span and may

eventually lead to damage over time.

NOTE: The Acheron Designer uses digital limit-

ers that add no noise and have no effect on the

signal when the limiters are not engaged and the

Limit LEDs are not lit.

!

Limit LEDs

Limit

On / Status

Input

AVIS

RISQUE DE CHOC

ELECTRIQUE

NE PAS OUVRIR

CAUTION

RISK OF

ELECTRIC SHOCK

DO NOT OPEN

High-frequency limiter (top LED)

Low-frequency limiter (bottom LED)

ACHERON DESIGNER OPERATING INSTRUCTIONS

15

ON/STATUS LED

During normal operation, the Acheron Designer’s On/Status

LED is green. If the loudspeaker’s internal temperature

reaches 75° C (167° F), the LED turns solid yellow and the

loudspeaker’s gain is reduced by 3 dB. Though the

Acheron Designer will continue to operate normally with the

lower gain, when the On/Status LED is yellow, this is an indi-

cation that the loudspeaker is reaching its maximum heat

dissipation and a reduction in SPL is recommended. When

the loudspeaker’s internal temperature cools to 60° C

(140° F), the amplifier returns to normal operation.

CAUTION: If the loudspeaker’s internal tem-

perature reaches 125° C (257° F), gain is

reduced by 6 dB to avoid damage to the loud-

speaker.

TIP: When the Acheron Designer is connected

to an RMS network, the RMS software provides

additional feedback on the loudspeaker’s operating

temperature. For more information, see Chapter 6,

“RMS Remote Monitoring System.”

Amplifier Cooling System

The Acheron Designer’s amplifier relies solely on natural

convection for cooling from air flowing over its heat sink.

The rear-mounted, recessed heat sink yields efficient cool-

ing and allows the unit to be placed flat against walls, when

necessary. The amplifier and heat sink keep temperatures

low, even when the unit is used at high ambient tempera-

tures, and when driven continuously at high output levels.

CAUTION: The Acheron Designer’s heat sink

can reach temperatures of up to 85° C (185° F)

during extreme operation. Use extreme caution when

approaching the rear of the loudspeaker.

Heat Sink Ventilation Requirements

When installing the Acheron Designer flush against walls, or

when mounting them in soffits or baffle walls, make sure to

allow plenty of ventilation above the loudspeaker.

■When installing the Acheron Designer in a soffit with the

loudspeaker flush against the back of the soffit (see

Figure 2), allow at least 6 inches above the loudspeaker

for ventilation.

!

!

Figure 2: Acheron Designer Mounted in Soffit, Flush Against Back

of Soffit with 6” of Ventilation Above Loudspeaker

6.00

[152 mm]

CHAPTER 3: AMPLIFICATION AND AUDIO

16

■When installing the Acheron Designer in a soffit with the

loudspeaker 1 inch from the back of the soffit (see

Figure 3), allow at least 3 inches above the loudspeaker

for ventilation.

■When installing the Acheron Designer in a baffle wall with

no opening in the front of the wall for ventilation (see

Figure 4), allow for plenty of ventilation above the loud-

speaker within the baffle wall.

Figure 3: Acheron Designer Mounted in Soffit, 1” Behind and 3”

Above Loudspeaker for Ventilation

3.00

[76 mm]

1.00

[25 mm]

Figure 4: Acheron Designer Mounted in Baffle Wall with Open

Ventilation Above Loudspeaker

17

CHAPTER 4: RIGGING

Important Safety Considerations!

When installing Meyer Sound loudspeakers and subwoof-

ers, the following precautions should always be observed:

■All Meyer Sound products must be used in accordance

with local, state, federal, and industry regulations. It is

the owner’s and user’s responsibility to evaluate the reli-

ability of any mounting and rigging method for their

application. Mounting and rigging should only be carried

out by experienced professionals.

■Use mounting and rigging hardware that has been rated

to meet or exceed the weight being hung.

■Make sure to attach mounting hardware to the building's

structural components (studs or joists), and not just to

the wall surface. Verify that the building's structure and

the anchors used for the installation will safely support

the total weight of the mounted loudspeakers.

■Use mounting hardware appropriate for the surface

where the loudspeaker will be installed.

■Make sure bolts and eyebolts are tightened securely.

Meyer Sound recommends using Loctite® on eyebolt

threads and safety cables.

■Inspect mounting and rigging hardware regularly. Imme-

diately replace any worn or damaged components.

MYA-DES CRADLE-STYLE YOKE

The Acheron Designer includes M6 threaded attachment

points on the cabinet bottom for the optional MYA-DES cra-

dle-style yoke, allowing the unit to be suspended from a sin-

gle hanging point.

The yoke’s cradle can be pivoted to install the loudspeaker

with downtilt or uptilt. A “C” or “G” hanging clamp and steel

safety cable (not included) are required to suspend the yoke.

CAUTION: The MYA-DES mounting yoke is

rated for a maximum downtilt of 45 degrees.

NOTE: The top bar of the MYA-DES yoke

accommodates hanging clamps with standard

1/2- inch or 12 mm bolts.

NOTE: For Acheron Designer dimensions and

weight with the MYA-DES yoke, refer to

Appendix A, “Acheron Designer Specifications.”

Acheron Designer Cabinet Bottom, M6 Threaded Attachment Points

M6 threaded

attachment

points

MYA-DES Cradle-Style Yoke, Bottom View

!

CHAPTER 4: RIGGING

18

19

CHAPTER 5: RMS REMOTE MONITORING SYSTEM

The Acheron Designer is optionally available with the RMS

remote monitoring system module, allowing it to be con-

nected to an RMS network. RMS allows real-time monitor-

ing of multiple Meyer Sound self-powered loudspeakers

from a Windows-based computer. The RMS host computer

communicates with Meyer Sound loudspeakers (equipped

with RMS modules) via a simple twisted pair network, or an

Ethernet network using an FT-10 to Ethernet adapter.

NOTE: For the latest RMS system require-

ments, visit www.meyersound.com.

NOTE: The RMS software allows you to dis-

able Mute and Solo functions to eliminate any

possibility of accidentally muting loudspeakers. Mute

and solo capability can also be disabled by removing

the Mute Jumper from RMS modules. For more infor-

mation, refer to the RMS User Guide.

NOTE: RMS does not control AC power.

RMS SOFTWARE

The optional RMS software provides extensive system sta-

tus and performance data for each loudspeaker, including

amplifier voltage, limiting activity, power output, driver sta-

tus, as well as mute and solo capability. Loudspeakers are

added to the RMS network and assigned a node name dur-

ing a one-time commissioning procedure where the loud-

speaker is identified by either entering its unique Neuron ID,

or by pressing its Identify button.

Once loudspeakers are identified on the RMS network, they

appear in the RMS software as icons and views; they are

also automatically added to the RMS database on the host

computer.

RMS Add Loudspeaker Dialog Box

Acheron Designer RMS Icons

CHAPTER 5: RMS REMOTE MONITORING SYSTEM

20

RMS software displays all loudspeakers on the network in a

panel with icons, Meter views, and Text views that can be

customized to suit your needs. Loudspeaker data is

updated 2–5 times per second. Individual loudspeakers can

be physically identified with the Wink option in RMS, which

lights the Wink LED on the RMS module for that particular

loudspeaker. Conversely, a loudspeaker can be identified in

the RMS software by pressing the Identify button on the

loudspeaker’s RMS module.

Loudspeaker icons and views can be arranged to represent

how loudspeakers have been deployed in the system. Multi-

ple panels can be saved and recalled for specific perfor-

mances and venues.

NOTE: When the Acheron Designer heat sink

reaches 85° C (185° F), the On/Status LED

turns red, while its loudspeaker icon in the RMS soft-

ware turns yellow — indicating the loudspeaker is

running hot, but still within safe operating limits.

Make sure that the loudspeaker is properly ventilated.

RMS MODULE

The Acheron Designer RMS module includes an Identify

button, Wink/Activity LED, Remote Mute switch, and two

Network connectors.

NOTE: The buttons and LED on the

Acheron Designer RMS module are used

exclusively by RMS and have no effect on the acous-

tical or electrical activity of the loudspeaker.

Identify Button

The Identify button serves the following functions:

■If the loudspeaker has not yet been commissioned

(Wink/Activity LED not lit), press the Identify button to

identify the loudspeaker on the RMS network and com-

mission it.

■To decommission the loudspeaker, press and hold the

Identify button during startup (see “Resetting the RMS

Module” on page 21).

■To wink a commissioned loudspeaker, press the Identify

button. The Wink LED on the loudspeaker icon in the

RMS software lights up and the Wink/Activity LED on the

loudspeaker’s RMS user panel turns solid green. Press

the Identify button again to unwink the loudspeaker.

TIP: The Wink function is useful for identifying

the physical loudspeaker corresponding to a

loudspeaker icon in the RMS software.

RMS Panel with Icons

Figure 5: Acheron Designer RMS Module

ACHERON DESIGNER OPERATING INSTRUCTIONS

21

Wink/Activity LED (Green)

The green Wink/Activity LED indicates the status of the

loudspeaker:

■During startup, the LED blinks 10 times.

■If the loudspeaker has not yet been commissioned, the

LED is not lit after startup.

■If the loudspeaker has been successfully commissioned,

the LED flashes continuously and flashes more rapidly

with increased data activity.

■When the loudspeaker is winked, either by clicking the

Wink button in the RMS software or by pressing the

Identify button on the RMS user panel, the LED is solid

green.

TIP: The Wink function is useful for identifying

the physical loudspeaker corresponding to a

loudspeaker icon in the RMS software.

Remote Mute Switch

The recessed Remote Mute switch on the Acheron Designer

RMS module determines whether the RMS software can

control muting and soloing of the loudspeaker. The

Acheron Designer ships from the factory with the switch

enabled.

■Disable: When the Remote Mute switch is set to Disable

(to the left), the loudspeaker cannot be muted and

soloed from the RMS software.

■Enable: When the Remote Mute switch is set to Enable

(to the right), the loudspeaker can be muted and soloed

from the RMS software.

NOTE: The RMS software also allows you to

disable Mute and Solo functions to eliminate

any possibility of accidentally muting loudspeakers.

For more information, refer to the RMS User Guide.

RMS Network Connectors

The two Weidmuller connectors transfer data to and from

the RMS network. Two connectors are provided to allow for

easy connection of multiple (daisy-chained) loudspeakers

on the network. Included with each RMS-equipped loud-

speaker are RMS cable connectors and mounting blocks for

constructing RMS cables. The RMS blocks allow the cables

to be securely attached to the RMS module with screws.

NEURON ID FOR THE RMS MODULE

Each Acheron Designer RMS module has a unique 12-char-

acter Neuron ID (NID) that identifies the loudspeaker on the

network. When commissioning the loudspeaker, the NID

must either by entered manually or retrieved from the loud-

speaker by pressing its Identify button. The NID for the RMS

module is located on the user panel above the orange RMS

Network connectors (see Figure 5 on page 20).

RESETTING THE RMS MODULE

You can use the Identify button to reset the Acheron Designer

RMS module when powering up the loudspeaker. This will

cause the module to be decommissioned from the network.

To reset the Acheron Designer RMS module:

1. Disconnect the loudspeaker’s power cord.

2. Press and hold the Identify button.

3. While continuing to hold down the Identify button, recon-

nect the power cord.

4. After the Wink/Activity LED blinks on and off, release the

Identify button. The RMS module is reset and the loud-

speaker is decommissioned.

Remote Mute Switch

CHAPTER 5: RMS REMOTE MONITORING SYSTEM

22

23

CHAPTER 6: SYSTEM DESIGN AND INTEGRATION TOOLS

Meyer Sound offers two comprehensive tools to assist with

the acoustical and functional requirements of system design

and optimization. This chapter introduces MAPP Online 

Cinema, Meyer Sound’s patented online acoustical predic-

tion tool, and SIM 3, a comprehensive system for measure-

ment and analysis.

MAPP ONLINE CINEMA

MAPP Online Cinema is a powerful, cross-platform, Java-

based application for accurately predicting the coverage

pattern, frequency response, impulse response, and maxi-

mum SPL output of Meyer Sound cinema loudspeakers.

Residing on your local computer, the MAPP Online Cinema

client lets you configure Meyer Sound loudspeaker systems

and define the environment in which they will operate,

including air temperature, pressure, humidity, and even the

location and composition of walls. CAD (DXF) files contain-

ing detailed venue information can also be imported.

Sound system designers can use MAPP Online Cinema to

accurately predict the appropriate loudspeaker deployment

for each job, complete with coverage data, system delay

and equalization settings, and detailed design illustrations.

MAPP Online Cinema’s accurate, high-resolution predic-

tions ensure that systems will perform as expected, thereby

eliminating unexpected coverage problems and minimizing

on-site adjustments.

The key to the accuracy of MAPP Online Cinema’s predic-

tions is its exhaustive database of Meyer Sound loud-

speaker measurements. Performance predictions for each

loudspeaker are based on 360 1/48th-octave-band mea-

surements taken with a SIM audio analyzer in the Meyer

Sound anechoic chamber. The extraordinary consistency

between Meyer Sound loudspeakers guarantees that pre-

dictions from MAPP Online Cinema will closely match their

actual performance.

MAPP Online Cinema predictions are requested by the client

software and sent via the Internet to the high-speed Meyer

Sound servers where high-resolution (magnitude and phase)

polar data is processed with sophisticated acoustical pre-

diction algorithms. The resulting predictions are then

returned to and displayed on the local computer running the

MAPP Online Cinema client software.

TIP: Meyer Sound offers seminars and webinars

on using MAPP Online Cinema. For more infor-

mation, visit www.meyersound.com.

MAPP Online Cinema Applications

With MAPP Online Cinema, you can:

■Simulate different loudspeaker configurations to refine

system design and zero-in on the best coverage for

intended audience areas

■Simulate different screen types to evaluate their trans-

parence and reflectivity

■Monitor loudspeaker interactions to locate destructive

interferences so that loudspeakers can be re-aimed and

repositioned as necessary

■Place microphones anywhere in the sound field and pre-

dict their frequency response, impulse response, and

sound pressure

■Determine delay settings for surround loudspeakers

■Try out virtual Galileo equalization to determine optimum

real-world settings for the best system response

■Generate and export system images for client presenta-

tions

MAPP Online Cinema

CHAPTER 6: SYSTEM DESIGN AND INTEGRATION TOOLS

24

Using MAPP Online Cinema

MAPP Online Cinema is compatible with the following oper-

ating systems:

■Windows

■Linux®

■Unix®

■Mac OS®

For information on which operating system versions are

supported, visit www.meyersound.com.

Downloading and Installing MAPP Online Cinema

To use MAPP Online Cinema, you must register online at

www.meyersound.com. After entering your registration

information, an email will be sent to you with your user

name, password, and the MAPP Online Cinema download

location. On-screen instructions will guide you through the

download and installation process.

The MAPP Online Cinema client software is regularly

upgraded to add support for the latest Meyer Sound loud-

speakers, as well as to add feature enhancements. Most

upgrades are downloaded automatically when logging on to

a MAPP Online Cinema session. The MAPP Online Cinema

database includes all Meyer Sound EXP screen channel

loudspeakers, surround loudspeakers, subwoofers, and

processors.

SIM 3 MEASUREMENT SYSTEM

The SIM 3 audio analyzer is a high-resolution audio mea-

surement system comprised of software, hardware, micro-

phones, and accessory cables. The SIM 3 is optimized for

measuring audio frequencies with resolutions up 1/48th of

an octave, allowing you to apply precise corrections to bal-

ance system response using frequency and phase domain

information.

Source Independent Measurement Technique

The SIM 3 audio analyzer implements Meyer Sound’s source

independent measurement technique, a dual-channel

method that accommodates statistically unpredictable exci-

tation signals. Any excitation signal within a desired fre-

quency range can be used to obtain highly accurate

measurements for acoustical or electronic systems. For

example, concert halls and loudspeaker systems can be

captured during a performance and used as a SIM 3 test

signal, so you can:

■View measurement data as amplitude versus time

(impulse response) or amplitude and phase versus fre-

quency (frequency response)

■Utilize a single-channel spectrum mode

■View frequency domain data within a logarithmic fre-

quency axis

■Determine and internally compensate for propagation

delays using the SIM 3 Delay Finder

SIM 3 Applications

The SIM 3’s primary applications are testing and aligning

loudspeaker systems, which entails:

■Measuring propagation delays between subsystems to

determine appropriate polarities and delay times

■Measuring variations in frequency response caused by

the acoustical environment and the placement and inter-

action of loudspeakers to determine corrective equaliza-

tion

■Optimizing subwoofer integrations

■Optimizing loudspeaker arrays

The SIM 3 is also versatile and accurate enough for the fol-

lowing applications:

■Microphone calibration and equalization

■Transducer evaluation and correction

■Echo detection and analysis

■Vibration analysis

■Architectural acoustics

■Underwater acoustics

25

APPENDIX A: ACHERON DESIGNER SPECIFICATIONS

ACOUSTICAL

Operating Frequency Range 37 Hz – 18 kHz

Note: Recommended maximum operating frequency range. Response depends on loading

conditions and room acoustics.

Frequency Response 38 Hz – 17 kHz ±4 dB

Note: Measured free field with 1/3 octave frequency resolution at 4 meters.

Phase Response 230 Hz to 17 kHz ±30°

Maximum Peak SPL 130 dB

Note: Measured free field with music referred to 1 meter.

Dynamic Range >110 dB

Coverage 80° horizontal by 50° vertical

Crossover 680 Hz

Note: At this frequency, both transducers produce equal sound pressure levels.

TRANSDUCERS

Low Frequency One 12” cone driver

Nominal impedance: 2 

Voice coil size: 4”

High Frequency One 4” compression driver

Nominal impedance: 8 

Voice coil size: 4”

Diaphragm size: 4”

Exit size: 1.5”

AUDIO INPUT

Type Differential, electronically balanced

Maximum Common Mode Range ±5 V DC, clamped to earth for voltage transient protection

Connectors Female XLR input with male XLR loop output

Input Impedance 10 k differential between pins 2 and 3

Wiring Pin 1: Chassis/earth through 1 k, 1000 pF, 15 V clamp network to provide virtual ground lift at

audio frequencies

Pin 2: Signal +

Pin 3: Signal –

Case: Earth ground and chassis

DC Blocking Differential DC blocking up to the maximum common mode voltage

CMRR >50 dB, typically 80 dB (50 Hz – 500 Hz)

RF Filter Common mode: 425 kHz

Differential mode: 142 kHz

TIM Filter <80 kHz, integral to signal processing

Nominal Input Sensitivity 10 dBV (3.2 V rms, 4.5 V peak) continuous is typically the onset of limiting for noise and music

Input Level Audio source must be capable of producing +20 dBV (10 V rms, 14 V peak) into 600to pro-

duce the maximum peak SPL over the operating bandwidth of the loudspeaker

AMPLIFIER

Type Two-channel, Class-D

APPENDIX A: ACHERON DESIGNER SPECIFICATIONS

26

Output Power 700 W total (550 W low channel, 250 W high channel)

Note: Amplifier wattage rating based on the maximum unclipped burst sine-wave RMS volt-

age the amplifier will produce into the nominal load impedance: low-frequency channel, 33 V

rms into 2 ; high-frequency channel, 33 V rms into 8 .

Total Output 1400 W peak

Note: Peak power output based on the maximum unclipped peak voltage the amplifier will

produce into the nominal load impedance: low-frequency channel, 46 V peak into 2 ; high-

frequency channel, 46 V peak into 8 .

THD, IM TIM <.02%

Load Capacity 2 low channel, 8 high channel

Cooling Convection, with recessed heat sink

AC POWER

Connectors PowerCon with loop output

Voltage Selection Automatic, continuous range from 90–265 V AC

Safety Agency Rated Operating Volt-

age

100–240 V AC, 50/60 Hz

Turn On/Turn Off Points 90 V AC on, no turn-off, only fuse-protect above 265 V AC

Current Draw

Idle Current 0.23 A rms (115 V AC); 0.19 A rms (230 V AC); 0.24 A rms (100 V AC)

Maximum Long-Term Continuous

Current

1.58 A rms (115 V AC); 0.83 A rms (230 V AC); 1.78 A rms (100 V AC)

Burst Current 3.1 A peak (115 V AC); 1.4 A peak (230 V AC); 3.6 A peak (100 V AC)

Note: AC power cabling must be of sufficient gauge so that under burst current rms condi-

tions, cable transmission losses do not drop below the loudspeaker’s specified operating volt-

age range.

Ultimate Short-Term Peak Current 12.0 A peak (115 V AC); 8.0 A peak (230 V AC); 12.4 A peak (100 V AC)

Inrush Current 25 A peak (115 V AC); 54 A peak (230 V AC); 20 A peak (100 V AC)

PHYSICAL

Enclosure Premium birch plywood

Finish Low gloss, black textured

Protective Grille (Optional) Attachment points on cabinet front corners for optional grille frame with black cloth

Note: Weight for grille frame is 2.0 lbs ((0.9 kg).

Rigging (Optional) Two threaded M6 attachment points on cabinet bottom for optional MYA-DES cradle-style

yoke

Note: Weight for MYA-DES is 28.5 lbs (12.9 kg).

Dimensions 19.00" w x 25.38" h x 14.58" d (483 mm x 645 mm x 370 mm) without optional grille frame

Weight Weight 76.0 lbs (34.5 kg) without optional grille frame

ENVIRONMENTAL

Operating Temperature 0° C to +45° C

Non Operating Temperature <–40° C or >+75° C

Humidity to 95% at 35° C

Operating Altitude to 4600 m (15,000 ft)

Non Operating Altitude to 95% at 35° C

Shock 30 g 11 msec half-sine on each of 6 sides

Vibration 10 Hz – 55 Hz (0.010 m peak-to-peak excursion)

ACHERON DESIGNER OPERATING INSTRUCTIONS

27

ACHERON DESIGNER COMPLIANCE

ACHERON DESIGNER DIMENSIONS

Acheron Designer Dimensions

19.00

[483 mm]

25.00

[635 mm]

12.25

[311 mm]

25.38

[645 mm]

14.96

[380 mm]

12.18

[309 mm]

6.96

[177 mm]

14.00

[356 mm]

11.60

[295 mm]

6.00

[152 mm]

13.25

[337 mm]

14.58

[370 mm]

5.25

[133 mm]

3.51

[89 mm]

Acheron Designer

Weight

Without Grille Frame 76.0 lbs (34.5 kg)

With Grille Frame 78.0 lbs (35.4 kg)

APPENDIX A: ACHERON DESIGNER SPECIFICATIONS

28

Acheron Designer Dimensions with MYA-DES Cradle-Style Yoke

14.96

[380 mm]

19.00

[483 mm]

25.38

[645 mm]

6.96

[177 mm]

12.18

[309 mm]

22.00

[559 mm]

24.13

[613 mm]

27.62

[702 mm]

ø0.56

[ø14 mm]

3.00

[76 mm]

9.00

[229 mm]

2.00

[51 mm]

29.82

[757 mm]

5.25

[133 mm]

Acheron Designer

Weight

Without MYA-DES Yoke 76.0 lbs (34.5 kg)

With MYA-DES Yoke 104.5 lbs (47.4 kg)

Meyer Sound Laboratories Inc.

2832 San Pablo Avenue

Berkeley, CA 94702

www.meyersound.com

T: +1 510 486.1166

F: +1 510 486.835

© 2012

Meyer Sound. All rights reserved.

Acheron Designer Operating Instructions, PN 05.211.005.01 A