Meyer Sound MJF-212A-VEAM-RMS-3, MJF-212A-VEAM-3, MJF-212A-RMS, MJF-212A-ATTN/POL-3, MJF-212A-3 User Manual

OPERATING INSTRUCTIONS

MJF-212A™ High-Power Stage Monitor

ULTRAseRies

Keep these important operating instructions.
Check www.meyersound.com for updates.

European Office:
Meyer Sound Lab. GmbH
Carl Zeiss Strasse 13
56751 Polch, Germany

Made by Meyer Sound Laboratories
Berkeley, California USA

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

Manufacturer’s Name:

Meyer Sound Laboratories Inc.

Manufacturer’s Address:

2832 San Pablo Avenue
Berkeley, CA 94702-2204, USA

declares that the product

Product Name: MJF-212A loudspeaker
Product Options: All

conforms to the following Product Specifications
Safety: EN60065: 2002
IEC60065: 2001
EMC: EN55103-1: 1997 emission
EN55103-2: 1997 immunity

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Operation is subject to the following two conditions:
(1) this device may not cause harmful interference, and
(2) this device must accept any interference received, including
interference that may cause undesired operation.

Supplementary Information

The product herewith complies with the requirements of the Low
Voltage Directive 73/23/EEC and the EMC Directive 89/336/EEC.

Ofce of Quality Manager
Berkeley, California USA
June 1, 2007

European Contact: Your local Meyer Sound dealer or Meyer Sound
Germany, GmbH. Carl Zeiss Strasse 13, 56751 Polch, Germany.
Telephone: [phone] Fax: [phone]

Environmental specifications for Meyer Sound Electronics products

Operating temperature 0°C to +45°C
Non-operating temperature -40°C to +75°C
Humidity to 95% at 35°C
Operating altitude to 4600 m (15,000ft)
Non-operating altitude to 6300 m (25,000ft)
Shock 30 g 11 msec half-sine on each of
6 sides
Vibration 10 Hz to 55 Hz (0.010 peak-to-peak
excursion)

©2007 Meyer Sound. All rights reserved.

MJF-212A™ High-Power Stage Monitor Operating Instructions

The contents of this manual are furnished for informational purposes only, are subject to change without notice, and should not be construed as a
commitment by Meyer Sound Laboratories Inc. Meyer Sound assumes no responsibility or liability for any errors or inaccuracies 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 written permission from Meyer Sound.

MJF-212A, Galileo, Compass, Intelligent AC, RMS, and all alphanumeric product names are trademarks of Meyer Sound. Meyer Sound, Meyer
Sound MAPP Online, 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.

Printed in the U.S.A.

Part Number: 05.157.005.02 A

ii

SYMBOLS USED

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

Dangerous voltages: risk of

electric shock

Pour indiquer les risques

résultant de tensions

dangereuses

Zu die gefahren von

gefährliche spanning zeigen

Para indicar voltajes

peligrosos.

Important operating

instructions

Pour indequer important

instructions

Zu wichtige betriebs-

anweisung und unter-

haltsanweisung zeigen

Instrucciones importantes

de funcionamiento y/o

manteniento

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 accordance 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 grounding­type 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.

Frame or chassis Protective earth ground

Masse, châssis Terre de protection

Rahmen oder chassis Die schutzerde

Armadura o chassis Tierra proteccionista

11. Only use attachments/accessories specified by Meyer
Sound.

12. Use only with the caster rails or rigging specified by
Meyer Sound, or sold with the loudspeaker. Handles
are for carrying only.

13. Unplug this loudspeaker during lightning storms or
when unused for long periods of time.

14. Refer all servicing to qualified service personnel.
Servicing 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 loudspeaker does not
operate normally.

CAUTION: To reduce the risk of electric

shock, do not expose this loudspeaker
to rain or moisture. Do not install the loudspeaker
in wet or humid locations without using weather
protection equipment from Meyer Sound.

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SAFETY SUMMARY

English

- To reduce the risk of electric
shock, disconnect 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 user­serviceable parts. Repairs should
be performed only by factory­trained service personnel.

Français

- Pour réduire le risque
d’électrocution, débrancher
la prise principale de l’haut­parleur, avant d’installer le câble
d’interface 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 réglementation
locale concernant les installations
électriques.

- Ne pas installer l’haut-parleur dans
un endroit où il y a de l’eau ou une
humidité excessive.

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- 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 radiateurs
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
réparations doivent être effectuées
par du personnel qualifié et agréé
par le constructeur.

Deutsch

- Um die Gefahr eines elektrischen
Schlages auf ein Minimum zu
reduzieren, den Lautsprecher
vom Stromnetz trennen, bevor
ggf. ein Audio-Schnittstellensign
alkabel angeschlossen wird. Das
Netzkabel erst nach Herstellung
aller Signalverbindungen wieder
einstecken.

- Der Lautsprecher an eine
geerdete zweipolige Dreiphasen­Netzsteckdose anschließen.
Die Steckdose muß mit einem
geeigneten Abzweigschutz
(Sicherung oder Leistungsschalter)
verbunden sein. Der Anschluß
der unterbrechungsfreien
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
wärmeabstrahlenden

Haushaltsgeräten (z.B. Heizgerät

oder Herd) aufstellen.

- Im Inneren diesem Lautsprecher
herr-schen potentiell gefährliche
Spannungen. Nicht versuchen,
das Gerät zu öffnen. Es
enthält keine vom Benutzer
reparierbaren Teile. Reparaturen
dürfen nur von ausgebildetem
Kundenienstpersonal durchgeführt
werden.

Español

- Para reducir el riesgo de descarga
eléctrica, 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 efectuadas
todas las interconexiones de
señalizacion de audio.

- Conecte el altoparlante a un
tomacorriente bipolar y trifilar
con neutro de puesta a tierra.
El tomacorriente debe estar
conectado a la protección de
derivación 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
sobrecalentamiento, 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 repardas por el
usuario. Las reparaciones deben
efectuarse únicamente por parte
del personal de mantenimiento
capacitado en la fábrica.

CONTENTS

INTRODUCTION 1

CHAPTER 1: Introducing the MJF-212A High-Power Stage Monitor

Advanced MJF-212A Driver Technology 3
Integrated Amplifier and Processing

Total System Approach

CHAPTER 2: Power Requirements 5

AC Power Distribution 5
Looping and Cabling
Power Connector Wiring Conventions
Voltage Requirements
Current Requirements
Electrical Safety Issues

CHAPTER 3: Amplification and Audio 9

Audio Input 9
Amplification and Protection Circuitry
MJF-212A Interconnections 1
Cabling 1
The Limiting System 1

Low-Frequency Limiter 1
High-Frequency Limiter 1

Cooling System 1

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8

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0
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0
1

CHAPTER 4: RMS™ Remote Monitoring System 13

Understanding the RMS module 13

Service LED (Red) 1
Service Button 1
Wink LED (green) 1
Reset Button 1
Activity LED (Green) 1

User Interface 1

APPENDIX A: Optional VEAM Multipin Connector 15

APPENDIX B: MJF-212A Specifications and Dimensional Drawings 1

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4
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4
4
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INTRODUCTION

INTRODUCTION

These operating instructions provide important information
about the form, features, function, and specifications of the
MJF-212A™ high-power stage monitor.

Chapter 1: Introducing MJF-212A

description of MJF-212A and its capabilities and
functionality.

Chapter 2: Power Requirements discusses power
distribution and voltage and current requirements, as well
as electrical safety issues.

Chapter 3: Amplification and Audio will help you
understand and harness the power of the MJF-212A
amplifier. Amplifier specifications, connectivity, limiting, and
the cooling system are all covered.

Chapter 4: RMS™ Remote Monitoring System introduces
the optional RMS communication module that can be
installed in the MJF-212A amplifier to make use of Meyer
Sound’s RMS remote monitoring system.

Appendix A: Optional VEAM Multipin Connector
includes information on the optional factory-installed VEAM
Connector.

Appendix B:

provides detailed acoustic and electrical specifications for
the MJF-212A monitor, along with detailed dimensional
drawings.

Specifications and Dimensional Drawings

provides a general

HOW TO USE THIS MANUAL

As you read this manual, you’ll find figures and diagrams
to help you understand and visualize what you’re reading.
You’ll also find icons that flag important information or warn
you against improper or potentially harmful activities. These
icons include:

A NOTE identifies an important piece of
information relating to the topic under

discussion.

A TIP offers a helpful tip relevant to the topic
at hand.

A CAUTION gives notice that an action can

have serious consequences and could cause
harm to equipment or personnel, delays, or other
problems.

Information and specifications are applicable as of the date
of this printing. Updates and supplementary information are
posted on the Meyer Sound website at:

http://www.meyersound.com

You can contact Meyer Sound Technical Support at:

Tel: [phone]

Fax: [phone]

E-mail: [e-mail]

1

INTRODUCTION

2

CHAPTER 1

40°

5'-10"

2'

8'

12'

50°

CHAPTER 1: INTRODUCING THE MJF-212A HIGH-POWER STAGE MONITOR

The Meyer Sound MJF-212A is a self-powered stage
monitor designed to meet critical monitoring requirements
in professional applications. Exhibiting flat amplitude
and phase responses and exceptional impulse response,
the MJF-212A meets and exceeds the capabilities of
conventional stage monitors while offering the simplicity of
setup and operation provided by self-powered systems.

The MJF-212A monitor’s phase-corrected frequency range
of 55 Hz to 18 kHz enables accurate reproduction of both
vocals and instruments with high gain before feedback, and
provides excellent intelligibility at high output levels with
low distortion and no coloration added to the signal. The
MJF-212A is engineered to have exceptional low-frequency
headroom, which can be helpful in some applications such
as the extreme low-frequency demands of high-level drum
monitoring. The face of the low-profile cabinet slopes at
40 degrees from the stage to permit optimal placement
relative to the talent, while its medium-Q horn provides even
coverage in both the horizontal and vertical planes.

ADVANCED MJF-212A DRIVER TECHNOLOGY

The MJF-212A monitor and its high-powered drivers were
designed and manufactured at Meyer Sound’s factory in
Berkeley, California.

The low-frequency section features two high-power, 12-inch
cone drivers with 4-inch voice coils that easily meet the
power requirements of the system. The proprietary drivers
employ neodymium magnets for higher efficiency and
power handling with reduced weight. The lowest frequency
range is reproduced by these high-power drivers mounted
in an optimally vented enclosure, working in tandem, and
each powered by a dedicated amplifier channel.

The high-frequency section uses a 1.5-inch exit, 4-inch
diaphragm compression driver with a neodymium magnet,
also powered by a dedicated amplifier channel. The
output of the driver is coupled to a symmetrical 50-degree
constant-directivity horn, which allows the performer to
experience full bandwidth sound at generous distances
from the monitor.

Figure 1.1. MJF-212A high-power stage monitor

The MJF-212A is ideal for high-power monitoring with a
very low profile for applications that require clear sight lines.
With its self-powered advantage, the MJF-212A is equally
suited to touring, rental, and fixed installation applications.
High power, low profile, and ease of use make it an out­standing performer in large to medium concerts, as well
as corporate AV applications and clubs. The MJF-212A
produces a peak output of 139 dB SPL with exceptionally
flat phase and frequency response.

The cabinet is constructed from premium birch plywood
and coated with a durable, textured black finish. It is
available in custom color finishes, allowing it to blend in
with any environment. A metal grille lined with acoustical
black mesh protects the drivers. The rugged MJF-212A
includes plastic skids on the bottom of the unit to prevent
damage to the enclosure or stage floor.

Figure 1.2. MJF-212A coverage, with the performer at 2, 8, and 12 feet from
the monitor

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