Extron MPA 152 Plus User guide

MPA 152 Plus
ENERGY STAR® Qualified Mini Power Amplifier
User Guide
Audio Products
68-1320-03, Rev. D
01 24
Safety Instructions
Safety Instructions • English
WARNING: This symbol,
, when used on the product, is intended to
alert the user of the presence of uninsulated dangerous voltage within the
product’s enclosure that may present a risk of electric shock.
ATTENTION: This symbol,
, when used on the product, is intended
to alert the user of important operating and maintenance (servicing)
instructions in the literature provided with the equipment.
For information on safety guidelines, regulatory compliances, EMI/EMF
compatibility, accessibility, and related topics, see the Extron Safety and
Regulatory Compliance Guide, part number 68-290-01, on the Extron website,
www.extron.com.
Instructions de sécurité • Français
AVERTISSEMENT : Ce pictogramme,
, lorsqu’il est utilisé sur le
produit, signale à l’utilisateur la présence à l’intérieur du boîtier du produit
d’une tension électrique dangereuse susceptible de provoquer un choc
électrique.
ATTENTION : Ce pictogramme,
, lorsqu’il est utilisé sur le produit,
signale à l’utilisateur des instructions d’utilisation ou de maintenance
importantes qui se trouvent dans la documentation fournie avec
l’équipement.
Pour en savoir plus sur les règles de sécurité, la conformité à la réglementation,
la compatibilité EMI/EMF, l’accessibilité, et autres sujets connexes, lisez les
informations de sécurité et de conformité Extron, réf. 68‑290-01, sur le site Extron,
www.extron.com.
Istruzioni di sicurezza • Italiano
AVVERTENZA: Il simbolo,
, se usato sul prodotto, serve ad avvertire
l’utente della presenza di tensione non isolata pericolosa all’interno del
contenitore del prodotto che può costituire un rischio di scosse elettriche.
ATTENTZIONE: Il simbolo,
, se usato sul prodotto, serve ad avvertire
l’utente della presenza di importanti istruzioni di funzionamento e
manutenzione nella documentazione fornita con l’apparecchio.
Sicherheitsanweisungen • Deutsch
WARUNG: Dieses Symbol
auf demProdukt soll den Benutzer darauf
aufmerksam machen, dass im Inneren des Gehäuses dieses Produktes
gefährliche Spannungen herrschen, die nicht isoliert sind und die einen
elektrischen Schlag verursachen können.
VORSICHT: Dieses Symbol
auf dem Produkt soll dem Benutzer in
der im Lieferumfang enthaltenen Dokumentation besonders wichtige
Hinweise zur Bedienung und Wartung (Instandhaltung) geben.
Weitere Informationen über die Sicherheitsrichtlinien, Produkthandhabung,
EMI/EMF-Kompatibilität, Zugänglichkeit und verwandte Themen finden Sie in den
Extron-Richtlinien für Sicherheit und Handhabung (Artikelnummer
68-290-01) auf der Extron-Website, www.extron.com.
Instrucciones de seguridad • Español
ADVERTENCIA:
Este símbolo,
, cuando se utiliza en el producto,
avisa al usuario de la presencia de voltaje peligroso sin aislar dentro del
producto, lo que puede representar un riesgo de descarga eléctrica.
ATENCIÓN: Este símbolo,
, cuando se utiliza en el producto,
avisa al usuario de la presencia de importantes instrucciones de uso y
mantenimiento estas estan incluidas en la documentación proporcionada
con el equipo.
Para obtener información sobre directrices de seguridad, cumplimiento de
normativas, compatibilidad electromagnética, accesibilidad y temas relacionados,
consulte la Guía de cumplimiento de normativas y seguridad de Extron, referencia
68-290-01, en el sitio Web de Extron, www.extron.com.
Per informazioni su parametri di sicurezza, conformità alle normative, compatibilità
EMI/EMF, accessibilità e argomenti simili, fare riferimento alla Guida alla
conformità normativa e di sicurezza di Extron, cod. articolo 68‑290‑01, sul sito web
di Extron, www.extron.com.
Instrukcje bezpieczeństwa • Polska
OSTRZEŻENIE: Ten symbol,
, gdy używany na produkt, ma na celu
poinformować użytkownika o obecności izolowanego i niebezpiecznego
napięcia wewnątrz obudowy produktu, który może stanowić zagrożenie
porażenia prądem elektrycznym.
UWAGI: Ten symbol,
, gdy używany na produkt, jest przeznaczony do
ostrzegania użytkownika ważne operacyjne oraz instrukcje konserwacji
(obsługi) w literaturze, wyposażone w sprzęt.
Informacji na temat wytycznych w sprawie bezpieczeństwa, regulacji wzajemnej
zgodności, zgodność EMI/EMF, dostępności i Tematy pokrewne, zobacz Extron
bezpieczeństwa i regulacyjnego zgodności przewodnik, część numer 68-290-01,
na stronie internetowej Extron, www.extron.com.
Инструкция по технике безопасности • Русский
ПРЕДУПРЕЖДЕНИЕ:
Данный символ,
, если указан
на продукте, предупреждает пользователя о наличии
неизолированного опасного напряжения внутри корпуса
продукта, которое может привести к поражению
электрическим током.
ВНИМАНИЕ: Данный символ,
, если указан на продукте,
предупреждает пользователя о наличии важных инструкций по
эксплуатации и обслуживанию в руководстве, прилагаемом к
данному оборудованию.
Для получения информации о правилах техники безопасности,
соблюдении нормативных требований, электромагнитной
совместимости (ЭМП/ЭДС), возможности доступа и других вопросах
см. руководство по безопасности и соблюдению нормативных
требований Extron на сайте Extron: , www.extron.com,
номер по каталогу - 68-290-01.
安全说明 • 简体中文
警告： 产品上的这个标志意在警告用户, 该产品机壳内有暴露的危险
电压，有触电危险。
注意： 产品上的这个标志意在提示用户, 设备随附的用户手册中有重
要的操作和维护(维修)说明。
关于我们产品的安全指南、遵循的规范、EMI/EMF 的兼容性、无障碍使
用的特性等相关内容，
敬请访问 Extron 网站 , www.extron.com，参见 Extron 安全规范指南，产品编
号 68-290-01。
安全記事 • 繁體中文
안전 지침 • 한국어
警告:
若產品上使用此符號，是為了提醒使用者，產品機殼內存在未隔離的危
險電壓，可能會導致觸電之風險。
注意
若產品上使用此符號，是為了提醒使用者，設備隨附的用戶手冊中有重
要的操作和維護（維修）説明。
有關安全性指導方針、法規遵守、EMI/EMF 相容性、存取範圍和相關主題的詳細資訊，
請瀏覽 Extron 網站：www.extron.com，然後參閱《Extron 安全性與法規遵守手
冊》，準則編號 68-290-01。
경고: 이 기호
가 제품에 사용될 경우, 제품의 인클로저 내에 있는
접지되지 않은 위험한 전류로 인해 사용자가 감전될 위험이 있음을
경고합니다.
주의: 이 기호
가 제품에 사용될 경우, 장비와 함께 제공된 책자에 나와
있는 주요 운영 및 유지보수(정비) 지침을 경고합니다.
안전 가이드라인, 규제 준수, EMI/EMF 호환성, 접근성, 그리고 관련 항목에 대한
자세한 내용은 Extron 웹 사이트(www.extron.com)의 Extron 안전 및 규제 준수
안내서, 68-290-01 조항을 참조하십시오.
Copyright
© 2013 -2024 Extron. All rights reserved. www.extron.com
Trademarks
All trademarks mentioned in this guide are the properties of their respective owners.
The following registered trademarks (®), registered service marks (SM), and trademarks (TM) are the property of RGB Systems, Inc. or Extron (see the
current list of trademarks on the Terms of Use page at www.extron.com):
Registered Trademarks (®)
Extron, Cable Cubby, ControlScript, CrossPoint, DTP, eBUS, EDID Manager, EDID Minder, eLink, Flat Field, FlexOS, Glitch Free,
Global Configurator, Global Scripter, GlobalViewer, Hideaway, HyperLane, IP Intercom, IP Link, Key Minder, LinkLicense, LockIt, MediaLink,
MediaPort, NAV, NetPA, PlenumVault, PoleVault, PowerCage, PURE3, Quantum, ShareLink, Show Me, SoundField, SpeedMount,
SpeedSwitch, StudioStation, System INTEGRATOR, TeamWork, TouchLink, V‑Lock, VN‑Matrix, VoiceLift, WallVault, WindoWall, XPA, XTP,
XTP Systems, and ZipClip
Registered Service Mark(SM) : S3 Service Support Solutions
Trademarks (™)
AAP, AFL (Accu‑RATE Frame Lock), ADSP (Advanced Digital Sync Processing), AVEdge, CableCover, CDRS (Class D Ripple
Suppression), Codec Connect, DDSP (Digital Display Sync Processing), DMI (Dynamic Motion Interpolation), Driver Configurator,
DSP Configurator, DSVP (Digital Sync Validation Processing), EQIP, Everlast, FastBite, Flex55, FOX, FOXBOX, InstaWake+,
IP Intercom HelpDesk, MAAP, MicroDigital, Opti‑Torque, PendantConnect, ProDSP, QS‑FPC (QuickSwitch Front Panel Controller),
Room Agent, Scope‑Trigger, SIS, Simple Instruction Set, Skew‑Free, SpeedNav, Triple‑Action Switching, True4K, True8K, Vector™ 4K,
WebShare, XTRA, and ZipCaddy
FCC Class B Notice
NOTE: This device complies with part 15 of the FCC rules. 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.
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to
part 15 of the FCC rules. These limits provide reasonable protection against harmful interference in a
residential installation. This equipment generates, uses, and can radiate radio frequency energy and, if not
installed and used in accordance with the instructions, may cause harmful interference to radio
communications. There is no guarantee that interference will not occur. If this equipment does cause
interference to radio or television reception, which can be determined by turning the equipment off and on,
you are encouraged to try to correct the interference by one or more of the following measures:
•
Reorient or relocate the receiving antenna.
•
Increase the separation between the equipment and receiver.
•
Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
•
Consult the dealer or an experienced radio/TV technician for help.
In order to maintain compliance with FCC regulations, shielded cables must be used with this equipment.
Operation with non-approved equipment or unshielded cables is likely to result in interference to radio and TV
reception. The user is cautioned that changes and modifications made to the equipment without the approval
of the manufacturer could void the user’s authority to operate this equipment.
NOTE: For more information on safety guidelines, regulatory compliances, EMI/EMF compatibility,
accessibility, and related topics, see the Extron Safety and Regulatory Compliance Guide on the
Extron website.
Changes or modifications not expressly approved by the party responsible for compliance could void the
user’s authority to operate the equipment.
Conventions Used in this Guide
Notifications
In this user guide, the following are used:
WARNING: Potential risk of severe injury or death.
AVERTISSEMENT : Risque potentiel de blessure grave ou de mort.
CAUTION:
Risk of minor personal injury.
ATTENTION : Risque de blessure mineure.
ATTENTION:
•
Risk of property damage.
•
Risque de dommages matériels.
NOTE: A note draws attention to important information.
Specifications Availability
Product specifications are available on the Extron website, www.extron.com.
Extron Glossary of Terms
A glossary of terms is available at www.extron.com/technology/glossary.aspx.
Contents
Introduction...............................................................................................................................................................1
Important Safety Instructions..............................................................................................................................1
About the MPA 152 Plus.....................................................................................................................................2
MPA 152 Plus Features......................................................................................................................................2
Panels and Cabling..................................................................................................................................................4
MPA 152 Plus Rear Panel Features................................................................................................................... 4
Power Connector............................................................................................................................................4
Audio Inputs....................................................................................................................................................6
Remote Control...............................................................................................................................................7
Audio Output...................................................................................................................................................9
Setup and Operation..............................................................................................................................................10
Front Panel Features and Operation................................................................................................................10
Setting Input Level........................................................................................................................................ 11
Setting Bass and Treble................................................................................................................................ 11
Remote Control Options...................................................................................................................................12
Defeating the Auto Power-down Timer............................................................................................................. 13
Troubleshooting................................................................................................................................................14
Amplifier Fails to Exit Standby Mode Promptly.............................................................................................14
Amplifier Enters Standby Mode Too Early.....................................................................................................14
Mounting.................................................................................................................................................................15
Rack Mounting.................................................................................................................................................15
UL Guidelines for Rack Mounting.................................................................................................................15
Consignes UL pour le montage en rack........................................................................................................16
Rack Mounting Procedure.............................................................................................................................16
Back of the Rack Mounting...........................................................................................................................17
Other Mounting Options...................................................................................................................................17
Extron Warranty......................................................................................................................................................18
MPA 152 Plus • Contents
vii
MPA 152 Plus • Contents
viii
Introduction
This manual contains information about the Extron MPA 152 Plus mini power amplifier with instructions for
experienced installers on how to install, configure, and operate the equipment. Unless otherwise specified, in this
manual “amplifier” or “MPA” refer to the MPA 152 Plus.
This section provides the following information:
•
Important Safety Instructions
•
About the MPA 152 Plus
•
MPA 152 Plus Features
Important Safety Instructions
1. Read these instructions.
2. Keep these instructions.
3. Heed all warnings.
4. Follow all instructions.
5. Do not use this apparatus near water.
6. Clean only with dry cloth.
7. Do not block any ventilation openings. Install in accordance with the instructions of the manufacturer.
8. Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including
amplifiers) that produce heat.
9. Do not defeat the safety purpose of the polarized or grounding-type plug. A polarized plug has two blades
with one wider than the other. A grounding type plug has two blades and a third grounding prong. The wide
blade or the third prong are provided for safety. If the provided plug does not fit into the 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 apparatus.
11. Only use attachments or accessories specified by the manufacturer.
12.
Use only with the cart, stand, tripod, bracket, or table specified by the manufacturer, or sold with
the apparatus. When a cart is used, use caution when moving the cart/apparatus combination to
avoid injury from tip-over.
13. Unplug this apparatus during lightning storms or when unused for long periods of time.
14. Refer all servicing to qualified service personnel. Servicing is required when the apparatus has been
damaged in any way, such as if the power-supply cord or plug is damaged, liquid has been spilled or objects
have fallen into the apparatus, the apparatus has been exposed to rain or moisture, does not operate
normally, or has been dropped.
MPA 152 Plus • Introduction
1
About the MPA 152 Plus
The MPA 152 Plus is an ENERGY STAR qualified amplifier with an Extron exclusive, highly efficient, advanced
Class D amplifier design. It also features patented CDRS (Class D Ripple Suppression) technology that provides
a smooth, clean audio waveform and an improvement in signal fidelity over conventional Class D amplifiers. The
high efficiency design generates very little heat and allows the amplifier to be fanless and operated in
environments with little or no ventilation.
This stereo integrated mini power amplifier delivers up to 15 watts (rms) per channel stereo or dual mono into a 4
ohm sound system, or 8 watts (rms) per channel into an 8 ohm system. This model features a 90 dB signal-tonoise ratio with 0.1% THD+N, offering exceptional performance for speaker systems requiring compact,
economical, audio amplification.
Front panel controls allow easy adjustment of bass and treble volume and input level.
The quarter rack size allows a variety of mounting options. The unit complies with UL 2043 for smoke and heat
release for in-the-ceiling installations. It can be installed in the plenum space of the ceiling. Alternatively, the units
can be mounted on a tabletop, in a rack, under a desk, or in a projector mounting kit.
1
EO
VID
AY
PL
DIS
2
X
AU O
E
VID
F
OF
ON
3
PC
ME
LU
VO
4
E
AG
IM TE
MU
IG
NF
CO
US
LC
Ex
RS-232 or
IR Projector
control
Audio
OUTPUT
52
A1
MP
s
Plu
WER
PO
V AX
12 M
0.7A
UTS
INP
R
V
V
10
REMOTE
R
L
with IP Link
RGBHV
Audio
Laptop
Extron
MPA 152 Plus
Mini Power
Amplifier
n
S-Video
R
L
tro
Video
Audio
G
C 50mA
PL
Extron
MLC 104 IP Plus
MediaLink Controller
Audio
L
IP
M
Projector
/ 4Ω
8Ω S 2
AS
CLIRING
W
4
10
Extron
SM 3
DVD/VCR
Combo
Full-range
Speakers
Figure 1.
Typical Application for the MPA 152 Plus
MPA 152 Plus • Introduction
2
MPA 152 Plus Features
•
30 watts (rms) output power — Delivers up to 15 watts (rms) per channel, stereo or dual mono, into a 4
ohm speaker system or up to 8 watts (rms) per channel into an 8 ohm system. Provides significant audio
output for small integration projects with moderate sound system needs.
•
Improved signal-to-noise ratio — The 90 dB unweighted signal-to-noise ratio allows very low-noise
operation, ensures quiet, hiss-free amplification, and maintains audio signal integrity.
•
ENERGY STAR qualified amplifier — The MPA 152 Plus conserves energy and reduces operating costs.
•
Defeatable auto power-down timer for 24/7 applications — Ensures that the amplifier is always active for
24/7 operation in critical applications, while still retaining the ENERGY STAR qualification.
•
Extron patented CDRS - Class D Ripple Suppression — CDRS is an Extron patented technology that
provides a smooth, clean audio waveform and an improvement in signal fidelity over conventional Class D
amplifier designs. CDRS eliminates the high frequency switching ripple characteristic of Class D amplifiers, a
source of RF emissions which can interfere with sensitive AV equipment such as wireless microphones.
•
Front panel bass, treble, and input level controls — These are flush mounted and detented. They allow
quick attenuation of input signal and ±10 dB bass and treble shelving controls.
•
Stereo or Dual Mono toggle switch — Allows the user to choose between stereo output or to sum the left
and right inputs and produce dual mono outputs (see figure 7 on page 9). This eliminates the need for
external summing products in monoaural installations.
•
UL 2043 plenum rated — The MPA 152 Plus complies with UL 2043 for smoke and heat release for
installation within a plenum airspace above a drop ceiling (power supply excluded). Above‑the-ceiling
placement conceals the amplifier to prevent theft, and is convenient for installing equipment when space
inside the room is limited.
•
Three audio inputs — Accept balanced or unbalanced stereo line-level signals on a captive screw connector
and unbalanced stereo line-level signals on an RCA stereo pair, and a 3.5 mm stereo mini jack. This ensures
the amplifier can be easily integrated with a wide variety of sources and projectors.
•
The three stereo inputs are individually buffered and can be connected to three separate sources at
the same time without altering performance.
•
Auto power-down with fast power-up — The MPA 152 Plus meets ENERGY STAR qualification
requirements with an auto power-down feature that automatically places the amplifier into standby after 25
minutes of inactivity, dramatically reducing power consumption. It quickly returns to full power status in less
than one second upon signal detection. This feature can be defeated to allow for 24/7 operation.
•
Quick-plug speaker outputs — Speaker output is on a screw-lock captive screw connector for quick
installation.
•
Volume and mute remote control — A rear panel, three-pin captive screw remote input connector allows
remote adjustment of volume and muting.
•
Always-on clip limiting — Reduces gain automatically to prevent amplifier clipping.
•
Compact size — The amplifiers are housed in a 1U high, 3 inch deep, quarter rack wide metal enclosure,
which offers flexible mounting options.
MPA 152 Plus • Introduction
3
Panels and Cabling
This section discusses the MPA 152 Plus rear panel features and cabling.
MPA 152 Plus Rear Panel Features
The rear panel of the MPA 152 Plus (shown in figure 2 below) allows the user to connect power (see below),
Audio Inputs (see page 6), Remote Control (see page 7), and Audio Output (see page 9).
OUTPUTS
MPA 152 Plus
8Ω / 4Ω
CLASS 2
WIRING
R
L
L
A
A
B
C
B
C
V
10V
R
D
C
G
50mA
E
Power Connector
D
E
F
RCA connectors (see page 6)
Stereo jack input (see page 6)
Figure 2.
R
L
POWER
12V
0.7A MAX
REMOTE
INPUTS
F
Captive screw input (see page 6)
Remote control input (see page 7)
Speaker connectors (see page 9)
MPA 152 Plus Rear Panel Features
Power Connector
A Power connector — The MPA 152 Plus ships with an Extron 24 W desktop power supply. The power cord
connectors are correctly wired when shipped. Connect the pre-wired captive screw connector to the power
receptacle on the amplifier (see figure 3).
MPA 152 Plus
Amplifier
POWER
12V
0.7A MAX
Smooth
Ridges
A
A
Power
Receptacle
POWER
12V
0.7A MAX
Power Supply
Output Cord
Tie
Wrap
DC Power Cord
Captive Screw
Connector
SECTION A–A
3/16"
(5 mm) Max.
AC Power Cord
G Ground
+12 VDC input
Figure 3.
Ground all
Devices
External Power Supply
(12 VDC, 2.0 A)
Power Connector
MPA 152 Plus • Panels and Cabling
4
ATTENTION:
•
Always use a power supply supplied by or specified by Extron. Use of an unauthorized power supply
voids all regulatory compliance certification and may cause damage to the supply and the end product.
•
Utilisez toujours une source d’alimentation fournie ou recommandée par Extron. L’utilisation d’une
source d’alimentation non autorisée annule toute certification de conformité réglementaire, et peut
endommager la source d’alimentation et l’unité.
•
Suitable for use in environmental air space in accordance with Section 300.22.C of the National
Electrical Code, and Sections 2-128, 12‑010(3) and 12-100 of the Canadian Electrical Code, Part 1,
C22.1.
•
Convient à une utilisation dans les conduits d’aération, en accord avec la section 300.22.C du code
national d’électricité américain, et avec les sections 2-128, 12-010(3) et 12-100 du code d’électricité
canadien, partie 1, C22.1.
•
Unless otherwise stated, the AC/DC adapters are not suitable for use in air handling spaces or in wall
cavities. The power supply is to be located within the same vicinity as the Extron AV processing
equipment in an ordinary location, Pollution Degree 2, secured to the equipment rack within the
dedicated closet, podium, or desk.
•
Sauf mention contraire, les adaptateurs CA/CC ne conviennent pas à une utilisation dans les espaces
d’aération ou dans les cavités murales. La source d’alimentation doit être placée à proximité de
l’équipement Extron dans un emplacement ordinaire soumis à un degré de pollution de catégorie II,
solidement fixé au rack d’équipement d’une baie technique, d’un pupitre, ou d’un bureau.
•
Although the amplifier is plenum rated, the power supply provided with it is not. The power supply must
not be placed in the plenum space. Cables to and from the amplifier must also be plenum rated. The
DC power cord provided with the unit is not plenum rated.
•
Bien que l’amplificateur soit conforme à la norme relative aux faux plafonds, la source d’alimentation
fournie avec ne l’est pas. La source d’alimentation ne doit pas être placée dans l’espace plenum. Les
câbles depuis et vers l’amplificateur doivent aussi être classés plenum. Le cordon d’alimentation CC
fourni avec l’unité n’est pas classé plenum.
•
The installation must always be in accordance with the applicable provisions of National Electrical Code
ANSI/NFPA 70, article 725 and the Canadian Electrical Code part 1, section 16.
•
Cette installation doit toujours être conforme aux dispositions applicables du Code américain de
l’électricité (National Electrical Code) ANSI/NFPA 70, article 725, et du Code canadien de l’électricité,
partie 1, section 16.
•
The power supply shall not be permanently fixed to building structure or similar structure.
•
La source d’alimentation ne devra pas être fixée de façon permanente à la structure de bâtiment ou à
d’autres structures similaires.
•
The length of the exposed wires in the stripping process is critical. The ideal length is 3/16 inches (5
mm). Any longer and the exposed wires may touch, causing a short circuit between them. Any shorter
and the wires can be easily pulled out even if tightly fastened by the captive screws.
•
La longueur des câbles exposés est primordiale lorsque l’on entreprend de les dénuder. La longueur
idéale est de 5 mm (3/16 inches). S’ils sont trop longs, les câbles exposés pourraient se toucher et
provoquer un court-circuit. S’ils sont trop courts, ils peuvent être tirés facilement, même s’ils sont
correctement serrés par les borniers à vis.
NOTE: Do not tin the wires. Tinned wire does not hold its shape and can become loose over time.
MPA 152 Plus • Panels and Cabling
5
Audio Inputs
Use the rear panel receptacles (see figure 4) to connect audio sources to the amplifier. Wire the connectors as
shown below.
INPUTS
L
B
Figure 4.
R
L
R
C
D
Audio Inputs
Tip (+)
B RCA unbalanced stereo input connectors — These receptacles accept unbalanced,
line level audio signals. The input can be stereo, using two RCA connectors, or mono,
using a single RCA connector plugged into the left receptacle.
Sleeve ( )
RCA Connector
If unused, the receptacles automatically terminate to lower the noise floor.
C 3.5 mm unbalanced stereo input jack — This input also accepts unbalanced, line
Tip (L)
Ring (R)
level audio signals through a 3.5 mm tip‑ring‑sleeve (TRS) stereo connector. If unused,
the receptacle automatically terminates to lower the noise floor.
D Captive screw balanced or unbalanced audio input connector — This 5-pole 3.5
mm captive screw receptacle accepts line level, balanced or unbalanced, mono or
stereo audio inputs.
Tip
Ring
Sleeve
Unbalanced Mono Input
R
R
Balanced Stereo Input
3.5 mm TRS Connector
L
L
Tip
Sleeve
R
R
Unbalanced Stereo Input
Tip
Ring
Sleeves
Tip
Ring
L
L
Tip
Sleeve
Tip
Sleeve
Sleeve ( )
Balanced Mono Input
ATTENTION:
•
The length of the exposed wires in the stripping process is critical. The ideal length is 3/16 inches (5
mm). Any longer and the exposed wires may touch, causing a short circuit between them. Any shorter
and the wires can be easily pulled out even if tightly fastened by the captive screws.
•
La longueur des câbles exposés est primordiale lorsque l’on entreprend de les dénuder. La longueur
idéale est de 5 mm (3/16 inches). S’ils sont trop longs, les câbles exposés pourraient se toucher et
provoquer un court-circuit. S’ils sont trop courts, ils peuvent être tirés facilement, même s’ils sont
correctement serrés par les borniers à vis.
NOTE: Do not tin the wires. Tinned wire does not hold its shape and can become loose over time.
Depending on the position of the front panel toggle switch (figure 8, B, on page 10), the right and left channels
may be output as a stereo signal or as a dual mono signal. See Audio Output (see page 9) for more information.
MPA 152 Plus • Panels and Cabling
6
E Remote Control Input — This 3-pin, captive screw port allows an audio controller to control
volume and mute levels remotely. See Remote Control Options on page 12 if using a
MediaLink controller.
V C G
10V
50mA
Wiring for remote control
Options for remote control include the Extron VC 50, VCM 100 AAP, VCM 100 MAAP, VCM 200 series, and
MLA VC10 Plus. Third party 10k potentiometer volume controllers can also be connected to this port.
Figure 5 and the instructions below show the wiring for the VCM 100 MAAP. Wiring other remote control
connectors is similar.
REMOTE
V C G
10V
50mA
10 V (Pin 1)
2k ohms
Volume Pot
10k ohms
Vol/Mute
(Pin 2)
Mute
Switch
Ground (Pin 3)
Figure 5.
Remote Control Wiring
•
Pin 1 is for 10 VDC reference voltage output.
•
Pin 2 (C) has two functions:
Volume control: it can be used as a variable voltage input between 0 and 10 VDC, with 0 V giving full
attenuation and 10 V giving maximum volume.
Mute: it can be used for remote control muting. Sound is muted while this pin is shorted to ground.
•
Pin 3 is for the ground connection.
NOTE: All nominal levels are at ±10%.
MPA 152 Plus • Panels and Cabling
7
REMOTE
Remote Control
Controlling multiple amplifiers with one volume controller
Several MPA 152 Plus units can be daisy-chained so that one volume controller can simultaneously regulate the
volume of all the amplifiers.
NOTES:
•
As additional amplifiers are added to the daisy chain, the sensitivity of the volume potentiometer
changes. The maximum volume level (fully clockwise) is not affected. However, the effectiveness of the
minimum volume level (fully counterclockwise) in reducing the volume to inaudible levels decreases as
more amplifiers are added to the daisy chain.
•
When more than two amplifiers are attached to the chain, sound may begin to be heard even if the
levels have been set to their lowest. The muting of the output however can be remedied with a contact
closure button attached between the C (volume or mute) and G (ground) pins of the first amplifier in the
chain.
To regulate multiple amplifiers with a single volume controller, follow these instructions:
1. Attach all three pins of the volume controller to the corresponding pins on the first MPA 152 Plus unit only:
•
Ground () to ground (G)
•
Vol/Mute to C
•
10 V to V.
2. Use jumper wires to connect the C (Volume and Mute) pins of the first amplifier and each successive
amplifier.
3. Use jumper wires to connect the G (ground) pins of the first amplifier and each successive amplifier.
VOL/MUTE
10V
Extron
MPA 152 Plus
Daisy Chain
Figure 6.
Extron
VCM 100 AAP
V C G
10V
50mA
V C G
10V
50mA
V C G
10V
50mA
Regulating Multiple Amplifiers with a Single Volume Controller
NOTE: The 10V pin of the volume controller connects to the first MPA 152 Plus only. There are no jumper
wires linking it to subsequent amplifiers.
MPA 152 Plus • Panels and Cabling
8
Audio Output
F Speaker Connectors — This 4-pole, 5 mm screw lock captive screw receptacle is used to connect the
amplifier to the speakers.
With an 8 ohm load, the amplifier produces up to 8 watts per channel. With a 4 ohm load, the amplifier
produces up to 15 watts per channel.
ATTENTION:
•
The length of the exposed wires in the stripping process is critical. The ideal length is 3/16 inches
(5 mm). Any longer and the exposed wires may touch, causing a short circuit between them. Any
shorter and the wires can be easily pulled out even if tightly fastened by the captive screws.
•
La longueur des câbles exposés est primordiale lorsque l’on entreprend de les dénuder. La
longueur idéale est de 5 mm (3/16 inches). S’ils sont trop longs, les câbles exposés pourraient se
toucher et provoquer un court-circuit. S’ils sont trop courts, ils peuvent être tirés facilement, même
s’ils sont correctement serrés par les borniers à vis.
•
Use ‘Class 2 Wiring’ to connect speakers to the amplifier output.
•
Utilisez un câblage de classe 2 pour connecter les enceintes à la sortie de l’amplificateur.
•
Do not ground or short the speaker outputs as this will damage the amplifier.
•
Ne pas mettre à la terre ni créer de court-circuit dans les sorties de l’enceinte, afin d’éviter tout
risque de détérioration de l’amplificateur.
NOTE: Do not tin the wires. Tinned wire does not hold its shape and can become loose over time.
Captive
Screw
Left
+
+
Stereo
+
RCA
+
TRS
+
+
+
Captive
Screw
Right
RCA
TRS
+
Dual
Mono
+
+
+
+
Stereo
Amp Stage
Stereo/Dual Mono Switch
Figure 7.
MPA 152 Plus Summing Diagram
Signal flow is as follows:
1. The MPA 152 Plus sums and weights the left unbalanced signals from the TRS and RCA inputs. This
summed, unbalanced signal is then summed with the left balanced signal from the captive screw input.
2. The right channel is handled in the same way.
3. The left and right channels are then sent to the output amplifiers in one of two ways, depending on how the
front panel switch (see figure 8, B, on page 10) is set.
•
Stereo: The left and right channels are sent to the left and right output amplifiers respectively.
•
Dual Mono: The left and right channels are summed and then the resulting mono is fed to both of the
output amplifiers.
The captive screw, RCA, and TRS inputs are buffered.
MPA 152 Plus • Panels and Cabling
9
Setup and Operation
This section discusses:
•
Front Panel Features and Operation
•
Remote Control Options
•
Defeating the Auto Power-down Timer
•
Troubleshooting
Front Panel Features and Operation
This section describes how configure the MPA 152 Plus, using the front panel controls and how to set up the
remote control options.
STEREO
A
LEVEL
DUAL
MONO
BASS
TREBLE
MPA 152 Plus
MINI POWER AMPLIFIER
B
Figure 8.
C
MPA 152 Plus Front Panel
A Power LED — The LED lights green when the MPA 152 Plus unit is receiving power and active. It lights
amber when the unit is powered down (after 25 minutes of inactivity).
B STEREO or DUAL MONO toggle switch — Allows the user to choose between stereo output for stereo
applications (default) or dual mono output for mono applications.
C LEVEL, BASS, and TREBLE potentiometers — Three front panel potentiometers are used to optimize input
level, bass, and treble settings.
MPA 152 Plus • Operation
10
Do not use excessive torque when adjusting the LEVEL, BASS, or TREBLE potentiometers. Read the following
notification before adjusting the potentiometers:
ATTENTION:
•
The default position of the LEVEL potentiometer when shipped is turned fully counter-clockwise
(fully attenuated). The default position of the BASS and TREBLE potentiometers is 12 o’clock (flat
response).
•
La position par défaut du potentiomètre de niveau lors de son expédition est orientée vers le sens
antihoraire (atténuation complète). La position par défaut des potentiomètres de graves et d’aigus
est 12 h (réponse linéaire).
•
Do not use a screwdriver to adjust the potentiometers. The potentiometers should only be adjusted
as needed using the included Extron tweeker (small screwdriver).
•
Ne pas utiliser de tournevis pour ajuster les potentiomètres. Les potentiomètres doivent
uniquement être ajustés selon les besoins avec le petit tournevis Extron fourni.
•
While potentiometer tuning knobs may look like screws, they do not function in the same manner.
Use a light touch when adjusting to avoid applying excessive torque to the potentiometers.
•
Bien que les boutons de réglage du potentiomètre ressemblent à des vis, ils n’ont pas la même
fonction. Exercez une pression légère lors du réglage afin d’éviter un serrage excessif des
potentiomètres.
•
Applying excessive torque can cause mechanical damage to the potentiometer, rendering it
inoperable.
•
Un serrage excessif peut endommager le potentiomètre, le rendant inutilisable.
Setting Input Level
Adjust the MPA 152 Plus input level as follows:
1. Unplug the Remote connector from the unit.
2. Set the volume of the audio source to its minimum level by turning the LEVEL potentiometer fully
counterclockwise to its minimum setting without using excessive torque.
3. Set the volume of the audio source to its maximum level. No sound should come out.
4. Slowly increase the MPA 152 Plus level by rotating the LEVEL potentiometer clockwise without using
excessive torque until sound distortion starts.
5. Lower the level slightly until the distortion disappears. At this setting, whatever the volume setting of the audio
source, no clipping will occur.
Setting Bass and Treble
NOTES:
•
Do not use excessive torque when adjusting the BASS or TREBLE potentiometers.
•
Turning the BASS or TREBLE potentiometers counterclockwise will decrease the output at the specified
frequencies. Turning the potentiometers clockwise will increase the output. When the potentiometer is in
the center, flat response is achieved.
Adjust the MPA 152 Plus bass and treble as follows:
1. Use the BASS potentiometer to increase or decrease the bass shelving ±10 dB at 80 Hz and below.
2. Use the TREBLE potentiometer to increase or decrease the treble shelving ±10 dB at 10 kHz and above.
MPA 152 Plus • Operation
11
Remote Control Options
DVD
S-video
Audio RCA
8 ohm Ceiling
Speakers
in Parallel
PC
VGA w/
Audio Cable
OUTPUT
A
MP
WER
PO
V AX
12 M
0.7A
VCR
s
Plu
TS
PU
L
R
IN
L
R
L
Composite
Audio RCA
V
V
10
REMOTE
R
/ 4Ω
8Ω S 2
AS
CLIRING
W
2
15
G
C 50mA
Extron
MPA 152 Plus
Mini Power Amplifier
Variable
Audio
Output
1
R
CTO
2
OJE
PR
OFF
ON
3
ME
ComLink
4
LU
VO
IG
NF
CO
MLC
10
4 IP
TE
MU
AP
A
ME 100
LU
VO VCM
3 Extron
MLC 104 IP
Controller
2 Extron
Projector
1 IR Remote
Figure 9.
VCM 100 AAP
Volume/Mute Controller
Typical Application for the MPA 152 Plus, Using Remote Control
1 Using the IR remote for the projector — When using a projector with variable audio outputs, connect the
projector audio output to the MPA 152 Plus audio input. Use the IR remote for the projector to control the
volume of the projector, which effectively controls the volume of the MPA 152 Plus.
2 Extron volume controllers — Extron provides a range of volume and mute controllers for use with a
projector that lacks variable audio outputs. These options control the MPA 152 Plus volume directly (see
Wiring for remote control on page 7).
3 Using a MediaLink Controller — For a projector with variable audio output, connect the projector audio
output to the MPA 152 Plus audio input. Use a MediaLink controller to adjust the volume of the projector via
RS-232. MediaLink controllers can also use the IR remote to adjust the volume of the projector and, thus, the
input to the amplifier.
MPA 152 Plus • Operation
12
Defeating the Auto Power-down Timer
The auto power-down timer determines whether or not the amplifier enters standby mode. The amplifier powers
down if the input signal remains below the input signal detection threshold for about 25 minutes.
The timer resets whenever the input signal exceeds the input signal detection threshold. Resetting the timer starts
a new 25-minute countdown until the amplifier powers down. Resetting the timer also causes an amplifier that is
already powered down to “wake up.”
There may be times when it is desirable to bypass the auto power-down timer. However, this should be done as a
last resort. Examples of when defeating the auto power-down circuit might be required include:
•
If the amplifier is used in a paging system. When the amplifier has already powered down, the first syllable
might be cut off as the amplifier wakes up from standby mode.
•
If the input signal is so quiet that the level remains below the input signal detection threshold for 25 minutes,
the timer would cut the audio in the middle of playback by placing the amplifier into standby mode.
ATTENTION:
•
The following procedure cannot be reversed and should be carried out as a last resort. Be certain that
you need to defeat the auto power-down timer before continuing.
•
La procédure qui suit est irréversible et doit être effectuée en dernier recours. Veuillez désactiver le
temporisateur de mise hors tension automatique avant de continuer.
To defeat the auto power-down timer, follow these instructions:
1. Disconnect power from the amplifier.
2. Remove the four screws that secure the top enclosure to the bottom enclosure (there are two screws on each
side panel).
ATTENTION:
•
Exercise caution when removing the screws to avoid stripping the screw heads.
•
Soyez prudent en retirant les vis afin d’éviter d’abîmer les têtes de vis.
3. Slide the top enclosure forward to clear the switch and potentiometers on the front panel, then lift it straight up
to separate it from the bottom enclosure.
The circuit boards are now exposed at the front.
ATTENTION:
•
Do not touch the electronic components or connectors without being electrically grounded. Handle
circuit boards by their edges only. Electrostatic discharge (ESD) can damage equipment, although
you may not feel, see, or hear it.
•
Ne pas toucher les composants électroniques ou les connecteurs sans être électriquement relié à
la terre. Manipuler les circuits imprimés en les tenant seulement par leurs bords. Les décharges
électrostatiques (ESD) peuvent endommager l’équipement, même si vous ne pouvez pas le sentir,
le voir ou l’entendre.
MPA 152 Plus • Operation
13
Stereo to Dual Mono
Toggle Switch
Level Potentiometer
Resistor R42
Figure 10. Front View, Showing the Location of Resistor R42
4. Identify resistor R42 at the front of the bottom circuit board between the STEREO to DUAL MONO toggle
switch (to the left) and the LEVEL potentiometer (to the right). The resistor is shown in the white box in figure
10.
5. Remove the resistor using a pair of diagonal cutters to clip the wires attaching it to the circuit board.
6. Re-attach the top enclosure with the four screws removed in step 2 (see page 13).
Troubleshooting
Under different circumstances, the front panel LED lights green or amber to provide diagnostic information.
Amplifier Fails to Exit Standby Mode Promptly
Power LED Color
Problem Description
Problem Solution
Amber
No output signal.
No input detected: verify that there is an input signal.
If a signal is present, raise the level of the source signal.
Green
No output signal.
The amplifier may be in mute mode. Check the Remote
port.
Green or Amber
Slow to exit standby mode
when a signal is present.
The input signal may be too weak. Raise the level of the
source signal.
Amplifier Enters Standby Mode Too Early
Power LED Color
Green or Amber
Problem Description
Problem Solution
Enters standby mode early.
The input signal may be too weak. Raise the level of the
source signal.
MPA 152 Plus • Operation
14
Mounting
This section provides information about the mounting options for the MPA 152 Plus.
Rack Mounting
Other Mounting Options
Rack Mounting
UL Guidelines for Rack Mounting
The following Underwriters Laboratories (UL) guidelines are relevant to the safe installation of the MPA 152 Plus
in a rack:
CAUTION:
•
Elevated operating ambient temperature — If the unit is installed in a closed or multi-unit rack assembly,
the operating ambient temperature of the rack environment may be greater than room ambient
temperature. Therefore, install the equipment in an environment compatible with the maximum ambient
temperature (TMA: +122 °F, +50 °C) specified by Extron.
•
Reduced air flow — Install the equipment in the rack so that the equipment gets adequate air flow for
safe operation.
•
Mechanical loading — Mount the equipment in the rack so that uneven mechanical loading does not
create a hazardous condition.
•
Circuit overloading — Connect the equipment to the supply circuit and consider the effect that circuit
overloading might have on overcurrent protection and supply wiring. Appropriate consideration of the
equipment nameplate ratings should be used when addressing this concern.
•
Reliable earthing (grounding) — Maintain reliable grounding of rack‑mounted equipment. Pay particular
attention to supply connections other than direct connections to the branch circuit (such as the use of
power strips).
MPA 152 Plus • Mounting
15
Consignes UL pour le montage en rack
Les consignes UL (« Underwriters Laboratories ») suivantes concernent l’installation en rack d’un boîtier
MPA 152 Plus :
ATTENTION :
•
Température ambiante élevée — En cas d’installation de l’équipement dans un rack fermé ou composé
de plusieurs unités, la température du rack peut être supérieure à la température ambiante. Par
conséquent, il est préférable d’installer l’équipement dans un environnement qui respecte la
température ambiante maximale (Tma: +122°F, +50°C) spécifiée par Extron
•
Réduction du flux d’air — Si l’équipement est installé dans un rack, veillez à ce que le flux d’air
nécessaire pour un fonctionnement sécurisé de l’équipement soit respecté.
•
Charge mécanique — Installez l’équipement en rack de manière à éviter toute situation dangereuse
causée par le déséquilibre de la charge mécanique.
•
Surcharge électrique — Lorsque vous connectez l’équipement au circuit d’alimentation, observez la
connexion de l’équipement et étudiez les effets possibles d’une surcharge du circuit sur les protections
contre les surintensités et les conducteurs d’alimentation. Consultez à cet égard les indications de la
plaque d’identification de l’équipement.
•
Mise à la terre — Assurez-vous que l’équipement est correctement mis à la terre. Accordez une
attention particulière aux connexions électriques autres que les connexions directes au circuit de
dérivation (ex. : les multiprises).
Rack Mounting Procedure
The unit can be mounted on a compatible rack system (optional). Follow the instructions provided with the shelf
accessories.
ATTENTION:
•
Use only the two holes indicated in figure 11 for mounting the MPA 152 Plus. The other four holes
anchor stand-offs for the internal circuit boards; using them may damage the amplifier and will not
provide secure mounting for the unit.
•
Utilisez seulement les deux trous, comme indiqué dans figure 11, pour monter le MPA 152 Plus. Les
quatre autres trous fixent des entretoises pour les circuits imprimés internes. Le fait de les utiliser
pourrait endommager l’amplificateur et n’assurera pas un montage sécurisé pour l’unité.
1.44"
Hole for Rack
Mounting Screw
(#4-40 Thread)
3.67"
Hole for Rack
Mounting Screw
(#4-40 Thread)
Figure 11.
Base of MPA 152 Plus to Show Mounting Holes
MPA 152 Plus • Mounting
16
Back of the Rack Mounting
Mount the unit at the back of a rack rail, following the instructions provided with the kit.
Other Mounting Options
•
Tabletop placement — Place the unit in any convenient location.
•
Plenum placement — The MPA 152 Plus amplifier complies with Section 300.22 (c) of the National Electrical
Code and is suitable for use in an Environmental Air Space. It can be installed in the ceiling, out of sight, with
reduced risk of theft.
ATTENTION:
•
Although the amplifier is plenum rated, the power supply provided with it is not. The power supply
must not be placed in the plenum space. Cables to and from the amplifier must also be plenum
rated. The DC power cord provided with the unit is not plenum rated.
•
Bien que l’amplificateur soit conforme à la norme relative aux faux plafonds, la source
d’alimentation fournie avec ne l’est pas. La source d’alimentation ne doit pas être placée dans
l’espace plenum. Les câbles depuis et vers l’amplificateur doivent aussi être classés plenum. Le
cordon d’alimentation CC fourni avec l’unité n’est pas classé plenum.
•
Under-desk mounting — Mount the unit under a desk or podium, following the instructions provided with the
kit.
•
Pole mounting — Mount the unit above a projector using a Pole Mounting Kit. Follow the instructions
provided with the kit.
•
ZipClip 200 mounting — Mount the unit under furniture or to a rack rail using the Extron ZipClip 200. Follow
the instructions provided with the mounting kit.
MPA 152 Plus • Mounting
17
Extron Warranty
Extron warrants this product against defects in materials and workmanship for a period of three years from the
date of purchase. In the event of malfunction during the warranty period attributable directly to faulty workmanship
and/or materials, Extron will, at its option, repair or replace said products or components, to whatever extent it
shall deem necessary to restore said product to proper operating condition, provided that it is returned within the
warranty period, with proof of purchase and description of malfunction to:
USA, Canada, South America,
and Central America:
Extron
1230 South Lewis Street
Anaheim, CA 92805
U.S.A.
Asia:
Extron Asia Pte Ltd
135 Joo Seng Road, #04-01
PM Industrial Bldg.
Singapore 368363
Singapore
Japan:
Extron Japan
Kyodo Building, 16
Ichibancho
Chiyoda-ku, Tokyo 102-0082
Japan
Europe:
Extron Europe
Hanzeboulevard 10
3825 PH Amersfoort
The Netherlands
China:
Extron China
686 Ronghua Road
Songjiang District
Shanghai 201611
China
Africa and Middle East:
Extron Middle East
Dubai Airport Free Zone
F13, PO Box 293666
United Arab Emirates, Dubai
This Limited Warranty does not apply if the fault has been caused by misuse, improper handling care, electrical
or mechanical abuse, abnormal operating conditions, or if modifications were made to the product that were not
authorized by Extron.
NOTE: If a product is defective, please call Extron and ask for an Application Engineer to receive an RA
(Return Authorization) number. This will begin the repair process.
USA:
714.491.1500 or 800.633.9876
Europe:
31.33.453.4040 or 800.3987.6673
Africa and Middle East:
971.4.299.1800
Asia:
65.6383.4400
Japan:
81.3.3511.7655
Units must be returned insured, with shipping charges prepaid. If not insured, you assume the risk of loss or
damage during shipment. Returned units must include the serial number and a description of the problem, as well
as the name of the person to contact in case there are any questions.
Extron Electronics makes no further warranties either expressed or implied with respect to the product and its
quality, performance, merchantability, or fitness for any particular use. In no event will Extron Electronics be liable
for direct, indirect, or consequential damages resulting from any defect in this product even if Extron Electronics
has been advised of such damage.
Please note that laws vary from state to state and country to country, and that some provisions of this warranty
may not apply to you.
Worldwide Headquarters: Extron USA West, 1025 E. Ball Road, Anaheim, CA 92805
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