Meyer Sound MM-10ACX-5 User Manual
OPERATING INSTRUCTIONS
MM-10 Miniature Subwoofer
MPS-488HP Power Supply
INDUSTRIAL SERIES
Keep these important operating instructions.
Check www.meyersound.com for updates.
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 Names: MM-10 Miniature Subwoofer
MPS-488HP Power Supply
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.
Signature:
Ms. Margie Garza
Director of Quality
Meyer Sound Laboratories Inc.
Berkeley, California 94702 USA
Issued July 26, 2010
European Contact:
Your local Meyer Sound dealer or
Meyer Sound Germany, GmbH.
© 2010
Meyer Sound. All rights reserved.
MM-10 Operating Instructions, PN 05.199.005.01 A
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.
MM-10, MM-4XP, MPS-488HP, MPS-488, and all alpha-numeric designations for Meyer Sound products and accessories are trademarks
of Meyer Sound. Meyer Sound and the Meyer Sound wave logo 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.
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
Warnung vor gef
elektrischer Spannung
Para indicar voltajes peligrosos Instrucciones importantes de
ährlicher
Important operating instructions Frame or chassis Protective earth ground
Pour indequer important
instructions
Wichtige Betriebsanweisung oder
Gebrauchsanleitung
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 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.
Masse, châssis Terre de protection
Rahmen oder Geh
Armadura o chassis Tierra proteccionista
äuse
Masse Schutzleiter
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. 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.
iii
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 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.
■ 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 celuici.
■ 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-Schnittstellensignalkabel angeschlossen wird. Das Netzkabel erst
nach Herstellung aller Signalverbindungen wieder einstecken.
■ Der Lautsprecher an eine geerdete
zweipolige Dreiphasen-Netzsteckdose
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 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 efectuadas 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 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 sobrecalen-
tamiento, 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.
iv
CONTENTS
Chapter 1: Introduction 7
How to Use This Manual 7
the MM-10 Miniature Subwoofer 7
MM-10 Options 8
Chapter 2: The MM-10XP Subwoofer 9
The MM-10XP Input Connector 9
The MM-10XP Input Polarity Switch 10
The MM-10XP Limit LED 10
MM-10XP Current Draw and Cable Requirements 11
Wiring MM-10XP Loudspeaker Cables with Belden 1502 Cable 12
Chapter 3: Powering MM-10XP Subwoofers with The MPS-488HP 13
The MPS-488HP Front Panel 13
The MPS-488HP Rear Panel 14
MPS-488HP Current Draw 16
Safety Issues 17
Connecting MM-10XP Subwoofers to the MPS-488HP 17
Powering MM-10XP Subwoofers with the Original MPS-488 18
Chapter 4: The MM-10AC Subwoofer 19
The MM-10AC AC Connectors 19
Power Connector Wiring 20
MM-10AC Voltage Requirements 20
MM-10AC Current Draw Requirements 20
Electrical Safety Issues 21
The MM-10AC Audio Connectors 21
The MM-10AC Input Polarity Switch 22
The MM-10AC Limit LED 22
Chapter 5: the MM-10ACX Subwoofer 25
The MM-10ACX AC Connectors 25
Power Connector Wiring 26
MM-10ACX Voltage Requirements 26
MM-10ACX Current Draw Requirements 27
Electrical Safety Issues 28
The MM-10ACX Audio In Connectors 28
The MM-10ACX Satellite Out Connectors 29
The MM-10ACX Input Select Switch 29
The MM-10ACX Gain Knob 30
The MM-10ACX Input Polarity Switch 30
The MM-10ACX Limit LED 30
MM-10ACX Satellite Configurations 32
Chapter 6: Mounting the MM-10 35
Important Safety Considerations 35
The MUB-MM10 U-Bracket 35
v
CONTENTS
Appendix A: MM-10 Accessories 37
Appendix B: Optional Rain Hoods 39
Appendix C: Phoenix and EN3 Cable Assembly 41
Appendix D: Specifications 47
vi
CHAPTER 1: INTRODUCTION
!
HOW TO USE THIS MANUAL
Make sure to read these operating instructions in their
entirety before configuring a loudspeaker system with
MM-10s. 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, or
could cause delays or other problems.
Information and specifications are subject to change.
Updates and supplementary information are available on the
Meyer Sound
http://www.meyersound.com
Meyer Sound Technical Support is available at:
■ Te l: +1 510 486.1166
■ Fax: +1 510 486.8356
■ Email: techsupport@meyersound.com
®
website:
THE MM-10 MINIATURE SUBWOOFER
The MM-10 miniature subwoofer delivers low frequency for
applications that require excellent audio quality from a compact system. Designed primarily as a companion to Meyer
Sound's MM-4XP miniature loudspeaker, as well as the
UP-4XP ultracompact loudspeaker, the MM-10 allows system designers to create full-range systems where space limitations are a concern.
MM-10 Miniature Subwoofer
The MM-10 features an operating frequency range of 33 Hz
to 228 Hz with a conservatively rated maximum peak SPL of
123 dB. The MM-10 bass reflex cabinet houses a single 10inch driver and a single-channel power amplifier complete
with onboard processing, including a crossover, driver protection, and frequency and phase correction. The built-in
crossover accepts full-range signals, facilitating basic daisychaining for signal distribution, eliminating the need for
external crossovers in small setups.
The MM-10 subwoofer is available from the factory in three
models — the MM-10XP, MM-10AC, and MM-10ACX —
each offering different internal configurations and audio and
power connectors (which cannot be upgraded).
7
CHAPTER 1: INTRODUCTION
The MM-10XP Subwoofer
The MM-10XP is powered by an external 48 V DC power
supply, eliminating the need for wiring conduits while still
preserving the advantages of self-powered loudspeaker
systems. The unit's onboard amplifier and signal-processing
circuits were designed to store DC power and tolerate voltage drops, thereby accommodating light-gauge cables and
lengthy cable runs. The MM-10XP is available with either a
Phoenix™ 5-pin male or sealed SwitchCraft
connector for receiving balanced audio and DC power. The
EN3 connector is ideal for outdoor, all-weather use.
The MPS-488HP External Power Supply
MM-10XPs require an MPS-488HP external power supply.
The single-space 19-inch rack unit receives balanced audio
from its XLR female inputs and routes the audio, along with
48 V of DC power, to its channel outputs. The channel outputs — equipped with either Phoenix 5-pin male connectors
or EN3 5-pin female connectors — can deliver DC power to
up to eight MM-10XP subwoofers.
®
EN3™ male
The MM-10ACX Subwoofer
The MM-10ACX model includes onboard DC power and
audio routing for driving a pair of MM-4XP miniature loudspeakers, or a single UP-4XP ultracompact loudspeaker,
effectively placing the MM-10ACX at the heart of an
extremely capable compact, full-range loudspeaker system.
Three XLR female inputs are included for receiving audio for
the subwoofer and two satellite loudspeakers. The
MM-10ACX is available with either Phoenix 5-Pin male or EN3
5-pin female satellite outputs. A two-channel stereo signal
can be patched to the satellite inputs and summed and routed
to the subwoofer if necessary.
MM-10 OPTIONS
Additional options for the MM-10 include the MUB-MM10
U-bracket for mounting the subwoofer on ceilings and walls;
weather protection, complete with a rain hood, for outdoor
all-weather use; and custom color finishes for installations
and applications with specific cosmetic requirements.
MPS-488HP Power Supply
Cable lengths up to 150 feet for DC power are possible
when using 18-AWG wire, with just 1 dB of loss in peak
SPL. Longer cable runs are possible for moderate applications that don't drive the subwoofers to maximum output, or
for installations with heavier wire gauges.
The use of composite multiconductor cables (such as
®
Belden
1502) allows a single cable to carry both DC power
and balanced audio to the MM-10XPs.
The MM-10AC Subwoofer
The MM-10AC is ideal for fixed installations and portable
applications where AC power is readily available to power
the unit. The MM-10AC includes an internal power supply
and locking PowerCon connectors for AC input and AC loop
output (for powering additional MM-10AC subwoofers). The
MM-10AC receives audio from an XLR female input, and
also includes an XLR male loop output for daisy-chaining
audio signals.
MM-10 with MUB-MM10 U-Bracket
8
CHAPTER 2: THE MM-10XP SUBWOOFER
The MM-10XP is powered by an external 48 V DC power
supply, eliminating the need for wiring conduits while still
preserving the advantages of self-powered loudspeaker
systems. The unit's onboard amplifier and signal-processing
circuits were designed to store DC power and tolerate voltage drops, thereby accommodating light-gauge cables and
lengthy cable runs.
THE MM-10XP INPUT CONNECTOR
The MM-10XP subwoofer is available with either a Phoenix
5-pin male or SwitchCraft EN3 5-pin male connector for
receiving DC power and balanced audio. The EN3 connector is ideal for outdoor, all-weather use. The connector’s five
pins include two for DC power (negative and positive) and
three for balanced audio (shield, negative, and positive).
These pins are clearly labeled on the MM-10XP rear panel.
To function properly, the MM-10XP requires 48 V of DC
power.
MM-10XP with Phoenix 5-Pin Male Connector
MM-10XP Rear Panel, Shown with Phoenix Connector
MM-10XP with EN3 5-Pin Male Connector
Depending on the subwoofer’s connector, the MM-10XP
ships with either a single Phoenix cable connector or an
EN3-to-pigtail cable for constructing loudspeaker cables.
NOTE: The pin outputs for the MM-10XP EN3
connector is identical to that of the MM-4XP.
However, the MM-10XP EN3 connector has been
rotated to accommodate the unit’s internal connections.
9
CHAPTER 2: THE MM-10XP SUBWOOFER
!
!
!
THE MM-10XP INPUT POLARITY SWITCH
The Input Polarity switch swaps the polarity of the audio
source signal, which is sometimes necessary to acoustically
align the subwoofer with other loudspeakers in the system.
When the switch is in the up (non-inverting) position, the
positive audio pin (+) is hot relative to the negative audio
pin (–), resulting in a positive pressure wave when a positive
signal is applied to the positive pin. When the switch is in the
down (inverting) position, the negative audio pin (–) is hot
relative to the positive audio pin (+), resulting in a positive
pressure wave when a positive signal is applied to the negative pin.
MM-10XP Input Polarity Switch
NOTE: The text for the Input Polarity switch on
the MM-10XP rear panel shows Pin 2 and
Pin 3, which is the convention used for the MM-10AC
and MM-10ACX models. However, the MM-10XP
Input Polarity switch actually reverses the polarity for
Pin 4 and Pin 5 of its input connector.
CAUTION: If the Limit LED turns red and stays
solid red after powering up and the audio is
muted, the subwoofer has encountered a failure and
may need to be serviced. Contact Meyer Sound
Technical Support.
CAUTION: If the Limit LED turns solid red and
the MM-10XP continues to output audio,
though at reduced levels, the subwoofer’s voltage
may have dropped below 25 V DC. When these conditions are encountered, operation of the subwoofer
should cease and its power supply and cabling
should be verified.
Limiting (Yellow)
Limiting activity is indicated when the Limit LED turns yellow. When engaged, the limiter protects the subwoofer’s
driver and prevents signal peaks from causing excessive
distortion in the subwoofer’s amplifier, thereby preserving
headroom and maintaining smooth frequency responses at
high levels. When the level returns to normal, below the limiter’s threshold, the LED turns green and limiting ceases.
The MM-10XP performs within its acoustical specifications
at normal temperatures when the Limit LED is green, or if the
LED turns yellow for two seconds or less and then returns to
green for at least one second. If the LED remains yellow for
longer than three seconds, the subwoofer enters hard limiting where:
THE MM-10XP LIMIT LED
The MM-10XP has a three-color Limit LED on its rear panel
that changes color to indicate the subwoofer’s status.
MM-10XP Limit LED
Powering On (Green)
When powering up the MM-10XP subwoofer, the following
startup events occur and are indicated by the Limit LED:
1. The LED flashes green and then yellow during power up.
2. The LED turns solid green indicating the subwoofer is
ready to reproduce audio.
■ 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.
CAUTION: The Limit LED turns yellow when
the subwoofer’s signal rises 2 dB above the
limiting threshold, and indicates a safe, optimum level
has been exceeded. If the MM-10XP subwoofers in a
system begin to limit before reaching the desired
SPL, consider adding more subwoofers to the system to achieve the desired SPL without exposing the
subwoofers to excessive levels and possible overheating.
10
MM-10 OPERATING INSTRUCTIONS
!
MM-10XP Temperature and Limiting
The Limit LED turns solid yellow when its heat sink temperature reaches 65° C (145° F), indicating the unit is reaching its
maximum heat dissipation and a reduction in SPL is recommended. While the MM-10XP will continue to operate while
the LED is yellow, the limiter threshold is lowered to a safe
level (causing the output level to be lowered by 6 dB) to prevent the subwoofer from overheating. When the temperature
of the heat sink cools to 50°C (122°F), the LED changes
from yellow to green and the limiter threshold returns to normal.
Clipping (Red)
The Limit LED flashes red when its input signal causes the
amplifier to overload. If the LED flashes red continuously, the
subwoofer is severely overloaded and a reduction in the
input level is recommended.
CAUTION: If the Limit LED turns solid red and
the subwoofer continues to output audio,
though at reduced levels, the subwoofer’s voltage
may have dropped below 25 V DC. When these conditions are encountered, operation of the subwoofer
should cease and its power supply and cabling
should be verified.
Cable Lengths and Cable Gauges for MM-10XPs
When connecting an MM-10XP to an MPS-488HP channel
output, you can use cable lengths of up to 150 feet with only
1 dB of peak SPL loss using 18 AWG wire. Longer cable
lengths are possible with heavier wire gauges (see Table 1
and Table 2).
Table 1: MM-10XP Loudspeaker Cable Lengths (AWG)
Cable Gauge Resistance
12 AWG 0.0016 600 ft
14 AWG 0.00253 375 ft
16 AWG 0.00402 237 ft
18 AWG 0.00636 150 ft
20 AWG 0.01008 87 ft
Table 2: MM-10XP Loudspeaker Cable Lengths (European)
Cable Gauge Resistance
2.50 mm
1.50 mm
1.00 mm
0.75 mm
2
2
2
2
(Ω/ft)
(Ω/m)
0.0052 157 m
0.01076 87 m
0.02087 45 m
0.03307 27 m
Approximate
Max. Length
Approximate
Max. Length
MM-10XP CURRENT DRAW AND CABLE REQUIREMENTS
Each MM-10XP subwoofer draws a maximum current of
3.31 A average and 3.45 A peak from the 48 V DC output of
the MPS-488HP. The current draw for the MM-10XP is
dynamic and fluctuates as operating levels change. The
cabling between the MM-10XP and the MPS-488HP adds
resistance and hence causes a voltage drop at the subwoofer. Because lower DC voltages compromise amplifier
performance (peak SPL), and in some cases frequency
response, cable resistance should be kept to a minimum.
NOTE: For long cable runs, you can use a large
cable gauge for DC power and a separate bal-
anced audio cable for audio.
NOTE: When connecting an MM-10XP to an
MPS-488HP channel output, the total cable
resistance should not exceed 2 ohms.
Calculating the Maximum Cable Length
The maximum cable length for an MM-10XP can be calculated with the following formula:
maximum length = 2 ohms / 2 * cable resistance
For example, the maximum length of an 18 AWG cable with
a resistance of 0.00636 is 157.2 feet (2 / 2 * 0.00636).
11
CHAPTER 2: THE MM-10XP SUBWOOFER
Red: DC power (+)
Black: DC power (–)
White: audio (+)
Blue: audio (–)
Audio shield
WIRING MM-10XP LOUDSPEAKER CABLES WITH BELDEN 1502 CABLE
When wiring MM-10XP loudspeaker cables with Belden
1502 or an equivalent cable, use the conventions in Table 3.
The red and black wires in the Belden 1502 cable have a
thicker gauge than the other three wires and should be used
for DC power. The blue, white, and shield wires are shielded
together and should be used for audio.
Belden 1502 Composite Cable
Table 3: Wiring MM-10XP Loudspeaker Cables with Belden 1502
Wire Gauge Gauge
Red DC power, positive (+) 18 AWG
Black DC power, negative (–) 18 AWG
White Balanced audio, positive (+) 22 AWG
Blue Balanced audio, negative (–) 22 AWG
Shield Balanced audio, shield 24 AWG
Both ends of the loudspeaker cable should be wired so that
the pins in the MM-10XP input connector align with those in
the MPS-488HP channel output connector (see “Channel
Inputs” on page 14).
Wiring EN3-to-Pigtail Cables
MM-10XPs equipped with EN3 connectors are shipped with
one 10-foot EN3 5-pin female-to-pigtail cable. The EN3 end
of the cable connects directly to the MM-10XP input connector. The pigtail end of the cable can be equipped with
either an EN3 5-pin male connector for connecting to the
MPS-488HPe power supply, or a Phoenix 5-pin female connector for connecting to the MPS-488HPp power supply.
The pigtail can also be spliced to a longer loudspeaker cable
or to a junction box. The included EN3-to-pigtail cable uses
a multiconductor cable, which can be wired for both DC
power and balanced audio. The EN3-to-pigtail cable is available in plenum or regular (non-plenum) versions.
NOTE: For a complete list of cables and cable
connectors available from Meyer Sound that
can be used with the MM-10XP subwoofer and
MPS-488HP power supply, see Appendix A, “MM-10
Accessories.”
12
CHAPTER 3: POWERING MM-10XP SUBWOOFERS WITH THE MPS-488HP
The MPS-488HP power supply delivers DC power and balanced audio to Meyer Sound loudspeakers that require a
48 V DC external power supply. The MPS-488HP is a multichannel, switched-mode, regulated power supply that occupies one space in a standard 19-inch rack. The MPS-488HP
can power up to eight MM-10XP subwoofers.
THE MPS-488HP FRONT PANEL
The MPS-488HP front panel includes a power switch and
LEDs for monitoring each loudspeaker channel.
MPS-488HPp Power Supply Front Panel
AC Power
The MPS-488HP is powered on and off with the AC Power
switch.
Voltage and Load Current LEDs (1–8)
The Voltage and Load Current LEDs are useful for verifying
whether each channel output has voltage and whether the
connected loudspeakers are receiving DC power and audio.
MPS-488HPp with Eight MM-10XPs
NOTE: The MPS-488HP power supply is avail-
able in two models: the MPS-488HPp, which is
equipped with Phoenix 5-pin male output connectors, and the MPS-488HPe, which is equipped with
EN3 5-pin female output connectors.
MPS-488HP Channel LEDs
Voltage LEDs (1–8)
The blue Voltage LEDs indicate whether voltage is present
for each channel output. These LEDs should be lit when the
MPS-488HP is powered on. The MPS-488HP’s intelligent
circuit protection shields connected loudspeakers from
surges and shorts. The blue Voltage LEDs flash on and off
when a surge or short is encountered. If a channel’s Voltage
LED flashes on and off, you should power down the
MPS-488HP and inspect the cabling for that channel.
Load Current LEDs (1–8)
The green Load Current LEDs indicate whether a loudspeaker is connected to the channel and receiving power.
As a channel’s audio signal increases, its LED glows
brighter. If an LED is not lit, check that the channel’s Voltage
LED is lit and verify the cable connection to the loudspeaker.
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CHAPTER 3: POWERING MM-10XP SUBWOOFERS WITH THE MPS-488HP
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THE MPS-488HP REAR PANEL
The MPS-488HP rear panel includes an AC Input connector,
eight Channel Inputs for receiving source audio, eight Channel Outputs for delivering DC power and balanced audio,
and seven Link switches for routing audio from inputs to
outputs.
MPS-488HPp Power Supply Rear Panel
MPS-488HPe Power Supply Rear Panel
AC Input
The MPS-488HP has a PowerCon twist-lock AC Input connector (line, neutral/line, earth). The connector can accept
different power cord types for outlets used throughout the
world. Make sure to use the correct power cord for the AC
power in your area. The MPS-488HP operates at an AC voltage range of 100–240 V at 50–60 Hz.
Link Switches
Link switches determine how Channel Inputs are routed to
Channel Outputs. When a Channel Input’s Link switch is
OFF (set to the down position), the input is only routed to its
corresponding output: for example, Channel Input 1 routed
to Channel Output 1. When a Link switch is ON (set to the
up position), the input is routed to its corresponding output
and the next adjacent output: for example, Channel Input 1
routed to Channel Output 1 and Channel Output 2. If multiple, adjacent Link switches are enabled, the input is routed
to each adjacent output: for example, Channel Input 1
routed to Channel Outputs 1, 2, and 3.
MPS-488HP Link Switches
NOTE: Channel Inputs are inactive when the
Link switch for their preceding Channel Input is
enabled. Connections should not be made to inactive
Channel Inputs.
Channel Inputs
Up to eight channels of balanced audio are received from the
MPS-488HP’s eight Channel Inputs. The inputs are equipped
with XLR female connectors (pin 1, ground; pin 2, signal positive; pin 3, signal negative). Make sure to use standard balanced XLR cables with all three pins connected on both ends.
MPS-488HP Channel Inputs
Channel Inputs default to being routed to their corresponding Channel Outputs but can also be routed to adjacent outputs with the Link switches, though this affects their input
impedance (see “Input Impedance for Linked Channel
Inputs” on page 15).
Routing Audio Inputs with the Link Switches
The following examples illustrate several common routing
applications for the MPS-488HPp.
Routing One Input to Eight Outputs
To route one Channel Input to eight Channel Outputs:
■ Set all Link switches to ON.
Link 1 Link 2 Link 3 Link 4 Link 5 Link 6 Link 7
On On On On On On On
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MM-10 OPERATING INSTRUCTIONS
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Routing Two Inputs to Four Outputs Each
To route two Channel Inputs to four Channel Outputs each:
1. Set the Link 4 switch to OFF and all other Link switches
to ON.
Link 1 Link 2 Link 3 Link 4 Link 5 Link 6 Link 7
On On On Off On On On
Routing Eight Inputs to Eight Separate Outputs
To route eight Channel Inputs to eight separate Channel
Outputs:
■ Set all Link switches to OFF.
Link 1 Link 2 Link 3 Link 4 Link 5 Link 6 Link 7
Off Off Off Off Off Off Off
To avoid distortion when linking Channel Inputs, make sure
the source device can drive the total load impedance of the
linked MM-10XP subwoofers. The source device must be
capable of delivering a minimum of 16 dBV (6.3 V rms into
600 ohms) to yield the maximum peak SPL over the operating bandwidth of the subwoofer.
NOTE: Most source devices are capable of
driving loads no smaller than 10 times their
output impedance. To drive eight MM-10XPs linked
from a single Channel Input, the source device
should have an output impedance of approximately
100 ohms or less.
Channel Outputs
The MPS-488HP’s eight Channel Outputs deliver DC power
(48 V DC) and balanced audio to up to eight MM-10XPs. The
channel outputs can be equipped with either Phoenix 5-pin
male connectors (on the MPS-488HPp model) or EN3 5-pin
male connectors (on the MPS-488HPe model).
NOTE: For information on MM-10XP cable
requirements, see “MM-10XP Current Draw
and Cable Requirements” on page 11. For information on cables and cable accessories available from
Meyer Sound, see Appendix A, “MM-10 Accessories.” For information on cable assembly, see
Appendix C, “Phoenix and EN3 Cable Assembly.”
Input Impedance for Linked Channel Inputs
When a Link switch is enabled, the Channel Input’s unbuffered source signal is transmitted in parallel to each linked
Channel Output. This causes the Channel Input’s impedance (normally 10 kOhms for one MM-10XP) to be reduced
for each linked output. For example:
■ 1 Channel Output, 10 kOhm input impedance
■ 2 Channel Outputs, 5 kOhm input impedance
■ 4 Channel Outputs, 2500 ohms input impedance
■ 8 Channel Outputs, 1250 ohms input impedance
TIP: A single composite cable (such as Belden
1502) wired for both DC power and balanced
audio can be used to connect MM-10XPs to Channel
Outputs.
CAUTION: When wiring cable connections for
the MPS-488HP channel outputs, it is
extremely important that each pin in the connector is
wired correctly. Make sure the 48 V DC from the
MPS-488HP is wired directly (and only) to the 48 V
DC pins on the MM-10XP connector, and that the
polarity is observed (negative to negative, positive to
positive) to avoid damage to the subwoofer. In addition, make sure the audio pins are wired correctly;
polarity reversals for audio signals will affect system
performance.
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CHAPTER 3: POWERING MM-10XP SUBWOOFERS WITH THE MPS-488HP
MPS-488HPp Channel Outputs
The MPS-488HPp Channel Outputs use Phoenix 5-pin male
connectors with three pins for balanced audio (positive, negative, and shield) and two for DC Power (positive and negative). These pins are clearly labeled on the MPS-488HPp rear
panel.
MPS-488HPp Channel Outputs
Each MPS-488HPp comes with eight Phoenix 5-pin female
cable connectors for assembling loudspeaker cables.
MPS-488HPe Channel Outputs
The MPS-488HPe Channel Outputs use EN3 5-pin female
connectors with three pins for balanced audio (positive,
negative, and shield) and two for DC Power (positive and
negative). These pins are clearly labeled on the
MPS-488HPe rear panel.
MPS-488HPe Channel Outputs
Each MPS-488HPe comes with eight EN3 5-pin male cable
connectors for assembling loudspeaker cables.
■ 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 seconds. 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. This current rating is also used as a rating for slow-reacting thermal breakers.
■ 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 calculating the peak voltage drop in long AC cable runs
according to the following formula:
V pk (drop) = I pk x R (cable total)
■ 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 the following table as a guide for selecting
cable gauges and circuit breaker ratings for the system’s
operating voltage.
Current Draw for MPS-488HP with Eight MM-10XPs
Current Draw
(Eight MM-10XPs)
Idle Current 0.74 A rms 0.54 A rms 0.81 A rms
Maximum Long-Term
Continuous Current
Burst Current 5.48 A rms 3.21 A rms 5.57 A rms
Ultimate Short-Term
Peak Current
Inrush Current 20.0 A peak 20.0 A peak 20.0 A peak
115
V AC
3.08 A rms 1.49 A rms 3.46 A rms
9.56 A peak 4.96 A peak 10.28 A peak
230
V AC
100
V AC
MPS-488HP CURRENT DRAW
The current draw for the MPS-488HP and its connected
loudspeakers is dynamic and fluctuates 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.
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The minimum electrical service amperage required by an
MPS-488HP is the sum of the Maximum Long-Term Continuous Current for all MM-10XPs connected to the MPS-488HP.
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 window.
MM-10 OPERATING INSTRUCTIONS
Earth ground
Chassis ground
SAFETY ISSUES
Pay close attention to these important electrical and safety
issues.
■ The MPS-488HP requires a grounded outlet.
■ Do not use a ground-lifting adapter or cut the AC cable
ground pin.
CONNECTING MM-10XP SUBWOOFERS TO THE MPS-488HP
To connect MM-10XP subwoofers to the MPS-488HP:
1. Power off the MPS-488HP.
2. Connect audio sources (from a mixer or processor) to
the MPS-488HP Channel Inputs. Use balanced XLR
cables.
3. Use the MPS-488HP Link switches to route Channel
Inputs to the desired Channel Outputs (see “Link
Switches” on page 14).
4. Connect the MM-10XP subwoofers to the MPS-488HP
Channel Outputs. Use composite cables (such as
Belden 1502) wired for both DC power and balanced
audio and outfitted with the appropriate connectors.
■ When connecting MM-10XP subwoofers equipped with
Phoenix connectors to the MPS-488HPp power supply,
use Phoenix 5-pin male to Phoenix 5-pin female cables.
■ Keep all liquids away from the MPS-488HP to avoid haz-
ards from electrical shock.
■ Do not operate the unit if the power cables are frayed or
broken.
TIP: You can use two separate cables for
MM-10XP subwoofer connections: a 2-conductor cable for DC power and a 3-conductor cable for
balanced audio, both attached to a single Phoenix
connector on each cable end. This allows you to use
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