Extron electronics MPA 152 User Manual

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User’s Manual

Mini Power Ampliﬁer

68-1320-01

Rev. A

02 09

MPA 152

Precautions

This symbol is intended to alert the user of important operating and maintenance (servicing) instructions in the literature provided with the equipment.

This symbol 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.

Caution

Read Instructions • Read and understand all safety and operating

instructions before using the equipment.

Retain Instructions • The safety instructions should be kept for future

reference.

Follow Warnings • Follow all warnings and instructions marked on the

equipment or in the user information.

Avoid Attachments • Do not use tools or attachments that are not

recommended by the equipment manufacturer because they may be hazardous.

Warning

Power sources • This equipment should be operated only from the power source

indicated on the product. This equipment is intended to be used with a main power system with a grounded (neutral) conductor. The third (grounding) pin is a safety feature, do not attempt to bypass or disable it.

Power disconnection • To remove power from the equipment safely, remove all power

cords from the rear of the equipment, or the desktop power module (if detachable), or from the power source receptacle (wall plug).

Power cord protection • Power cords should be routed so that they are not likely to be

stepped on or pinched by items placed upon or against them.

Servicing • Refer all servicing to qualiﬁed service personnel. There are no user-

serviceable parts inside. To prevent the risk of shock, do not attempt to service this equipment yourself because opening or removing covers may expose you to dangerous voltage or other hazards.

Slots and openings • If the equipment has slots or holes in the enclosure, these are

provided to prevent overheating of sensitive components inside. These openings must never be blocked by other objects.

Lithium battery • There is a danger of explosion if battery is incorrectly

replaced. Replace it only with the same or equivalent type recommended by the manufacturer. Dispose of used batteries according to the manufacturer’s instructions.

Ce symbole sert à avertir l’utilisateur que la documentation fournie avec le matériel contient des instructions importantes concernant l’exploitation et la maintenance (réparation).

Ce symbole sert à avertir l’utilisateur de la présence dans le boîtier de l’appareil de tensions dangereuses non isolées posant des risques d’électrocution.

Attention

Lire les instructions• Prendre connaissance de toutes les consignes de

sécurité et d’exploitation avant d’utiliser le matériel.

Conserver les instructions• Ranger les consignes de sécurité aﬁn de pouvoir

les consulter à l’avenir.

Respecter les avertissements • Observer tous les avertissements et consignes

marqués sur le matériel ou présentés dans la documentation utilisateur.

Eviter les pièces de xation • Ne pas utiliser de pièces de ﬁxation ni d’outils

non recommandés par le fabricant du matériel car cela risquerait de poser certains dangers.

Avertissement

Alimentations• Ne faire fonctionner ce matériel qu’avec la source d’alimentation

indiquée sur l’appareil. Ce matériel doit être utilisé avec une alimentation principale comportant un ﬁl de terre (neutre). Le troisième contact (de mise à la terre) constitue un dispositif de sécurité : n’essayez pas de la contourner ni de la désactiver.

Déconnexion de l’alimentation• Pour mettre le matériel hors tension sans danger,

déconnectez tous les cordons d’alimentation de l’arrière de l’appareil ou du module d’alimentation de bureau (s’il est amovible) ou encore de la prise secteur.

Protection du cordon d’alimentation • Acheminer les cordons d’alimentation de

manière à ce que personne ne risque de marcher dessus et à ce qu’ils ne soient pas écrasés ou pincés par des objets.

Réparation-maintenance • Faire exécuter toutes les interventions de réparation-

maintenance par un technicien qualiﬁé. Aucun des éléments internes ne peut être réparé par l’utilisateur. Aﬁn d’éviter tout danger d’électrocution, l’utilisateur ne doit pas essayer de procéder lui-même à ces opérations car l’ouverture ou le retrait des couvercles risquent de l’exposer à de hautes tensions et autres dangers.

Fentes et orices • Si le boîtier de l’appareil comporte des fentes ou des oriﬁces, ceux-ci

servent à empêcher les composants internes sensibles de surchauffer. Ces ouvertures ne doivent jamais être bloquées par des objets.

Lithium Batterie • Il a danger d’explosion s’ll y a remplacment incorrect de la batterie.

Remplacer uniquement avec une batterie du meme type ou d’un ype equivalent recommande par le constructeur. Mettre au reut les batteries usagees conformement aux instructions du fabricant.

Safety Instructions • English

Consignes de Sécurité • Français

Sicherheitsanleitungen • Deutsch

Dieses Symbol soll dem Benutzer in der im Li efe rum fan g en tha lte nen D oku men tation besonders wichtige Hinweise zur Bedienung und Wartung (Instandhaltung) geben.

Dieses Symbol soll den Benutzer darauf aufmerksam machen, daß im Inneren des Gehäuses dieses Produktes gefährliche Spannungen, die nicht isoliert sind und die einen elektrischen Schock verursachen können, herrschen.

Achtung

Lesen der Anleitungen • Bevor Sie das Gerät zum ersten Mal verwenden,

sollten Sie alle Sicherheits-und Bedienungsanleitungen genau durchlesen

und verstehen.

Aufbewahren der Anleitungen • Die Hinweise zur elektrischen Sicherheit

des Produktes sollten Sie aufbewahren, damit Sie im Bedarfsfall darauf

zurückgreifen können.

Befolgen der Warnhinweise • Befolgen Sie alle Warnhinweise und

Anleitungen auf dem Gerät oder in der Benutzerdokumentation.

Keine Zusatzgeräte • Verwenden Sie keine Werkzeuge oder Zusatzgeräte,

die nicht ausdrücklich vom Hersteller empfohlen wurden, da diese eine Gefahrenquelle darstellen können.

Vorsicht

Stromquellen • Dieses Gerät sollte nur über die auf dem Produkt angegebene

Stromquelle betrieben werden. Dieses Gerät wurde für eine Verwendung mit einer Hauptstromleitung mit einem geerdeten (neutralen) Leiter konzipiert. Der dritte

Kontakt ist für einen Erdanschluß, und stellt eine Sicherheitsfunktion dar. Diese

sollte nicht umgangen oder außer Betrieb gesetzt werden.

Stromunterbrechung • Um das Gerät auf sichere Weise vom Netz zu trennen, sollten

Sie alle Netzkabel aus der Rückseite des Gerätes, aus der externen Stomversorgung (falls dies möglich ist) oder aus der Wandsteckdose ziehen.

Schutz des Netzkabels • Netzkabel sollten stets so verlegt werden, daß sie nicht im

Weg liegen und niemand darauf treten kann oder Objekte darauf- oder unmittelbar

dagegengestellt werden können.

Wartung • Alle Wartungsmaßnahmen sollten nur von qualiziertem Servicepersonal

durchgeführt werden. Die internen Komponenten des Gerätes sind wartungsfrei. Zur Vermeidung eines elektrischen Schocks versuchen Sie in keinem Fall, dieses Gerät selbst öffnen, da beim Entfernen der Abdeckungen die Gefahr eines elektrischen Schlags und/oder andere Gefahren bestehen.

Schlitze und Öffnungen • Wenn das Gerät Schlitze oder Löcher im Gehäuse aufweist,

dienen diese zur Vermeidung einer Überhitzung der empndlichen Teile im

Inneren. Diese Öffnungen dürfen niemals von anderen Objekten blockiert werden.

Litium-Batterie • Explosionsgefahr, falls die Batterie nicht richtig ersetzt

wird. Ersetzen Sie verbrauchte Batterien nur durch den gleichen oder einen vergleichbaren Batterietyp, der auch vom Hersteller empfohlen wird. Entsorgen Sie verbrauchte Batterien bitte gemäß den Herstelleranweisungen.

Este símbolo se utiliza para advertir al usuario sobre instrucciones importantes de operación y mantenimiento (o cambio de partes) que se desean destacar en el contenido de la documentación suministrada con los equipos.

Este símbolo se utiliza para advertir al usuario sobre la presencia de elementos con voltaje peligroso sin protección aislante, que puedan encontrarse dentro de la caja o alojamiento del producto, y que puedan representar riesgo de electrocución.

Precaucion

Leer las instrucciones • Leer y analizar todas las instrucciones de operación y

seguridad, antes de usar el equipo.

Conservar las instrucciones • Conservar las instrucciones de seguridad para

futura consulta.

Obedecer las advertencias • Todas las advertencias e instrucciones marcadas

en el equipo o en la documentación del usuario, deben ser obedecidas.

Evitar el uso de accesorios • No usar herramientas o accesorios que no

sean especiﬁcamente recomendados por el fabricante, ya que podrian implicar riesgos.

Advertencia

Alimentación eléctrica • Este equipo debe conectarse únicamente a la fuente/tipo

de alimentación eléctrica indicada en el mismo. La alimentación eléctrica de este equipo debe provenir de un sistema de distribución general con conductor neutro a tierra. La tercera pata (puesta a tierra) es una medida de seguridad, no puentearia ni eliminaria.

Desconexión de alimentación eléctrica • Para desconectar con seguridad la acometida

de alimentación eléctrica al equipo, desenchufar todos los cables de alimentación en el panel trasero del equipo, o desenchufar el módulo de alimentación (si fuera independiente), o desenchufar el cable del receptáculo de la pared.

Protección del cables de alimentación • Los cables de alimentación eléctrica se deben

instalar en lugares donde no sean pisados ni apretados por objetos que se puedan apoyar sobre ellos.

Reparaciones/mantenimiento • Solicitar siempre los servicios técnicos de personal

caliﬁcado. En el interior no hay partes a las que el usuario deba acceder. Para evitar riesgo de electrocución, no intentar personalmente la reparación/mantenimiento de este equipo, ya que al abrir o extraer las tapas puede quedar expuesto a voltajes peligrosos u otros riesgos.

Ranuras y aberturas • Si el equipo posee ranuras o oriﬁcios en su caja/alojamiento,

es para evitar el sobrecalientamiento de componentes internos sensibles. Estas aberturas nunca se deben obstruir con otros objetos.

Batería de litio • Existe riesgo de explosión si esta batería se coloca en la posición

incorrecta. Cambiar esta batería únicamente con el mismo tipo (o su equivalente) recomendado por el fabricante. Desachar las baterías usadas siguiendo las instrucciones del fabricante.

Instrucciones de seguridad • Español

安全须知 • 中文

这个符号提示用户该设备用户手册中有重要的操作和维护说明。

这个符号警告用户该设备机壳内有暴

露的危险电压，有触电危险。

注意

阅读说明书 • 用户使用该设备前必须阅读并理

解所有安全和使用说明。

保存说明书 • 用户应保存安全说明书以备将来使

用。

遵守警告 • 用户应遵守产品和用户指南上的所有安

全和操作说明。

避免追加 • 不要使用该产品厂商没有推荐的工具或

追加设备，以避免危险。

警告

电源 • 该设备只能使用产品上标明的电源。设备

必须使用有地线的供电系统供电。第三条线（地线）是安全设施，不能不用或跳过。

拔掉电源 • 为安全地从设备拔掉电源，请拔掉所有设备后

或桌面电源的电源线，或任何接到市电系统的电源线。

电源线保护 • 妥善布线，避免被踩踏，或重物挤压。维护 • 所有维修必须由认证的维修人员进行。设备内部

没有用户可以更换的零件。为避免出现触电危险不要自己试图打开设备盖子维修该设备。

通风孔 • 有些设备机壳上有通风槽或孔，它们是用来防止

机内敏感元件过热。不要用任何东西挡住通风孔。

锂电池 • 不正确的更换电池会有爆炸的危险。必须使用

与厂家推荐的相同或相近型号的电池。按照生产厂的建议处理废弃电池。

声明

所使用电源为 A 级产品，在生活环境中，该产品可能会造成无线电干扰。在这种情况下，可能需要用户对其干扰采取切实可行的措施。

FCC Class B Notice

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 are designed to 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. However, there is no guarantee that the interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is 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.

This unit was tested with shielded cables on the peripheral devices. Shielded cables must be used

with the unit to ensure compliance.

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 manufacturer's instructions.

8) Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including ampliers) 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 your safety. If the provided plug does not t 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 apparatus.

11) Only use attachments/accessories specied by the manufacturer.

12) Use only with the cart, stand, tripod, bracket, or

table specied 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 qualied service personnel. Servicing is required when the apparatus has been damaged in any way, such as 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 Amplier • Quick Start Guide

QS-i

Quick Start Guide — MPA 152 Ampliﬁer

To install and set up an MPA 152 Mini Power Amplier, follow these steps:

Step 1

Turn all of the equipment off and disconnect it from power sources.

Step 2

Mount the MPA 152 on a rack, under a desk, or on a projector, as illustrated below.

Step 3

Attach the speakers to the MPA 152.

Step 4

Attach inputs to the MPA 152 unit from the audio source and/or projector. Ensure that the projector’s audio output is set to variable out. Multiple input options can be used simultaneously and result in audio mixing (see "Audio Inputs" in Chapter 2 for more information).

(2) 4-40 x 3/16" screws

Use 2 mounting holes on opposite corners.

3.5" Rack Shelf

1/4 Rack Width False Front Face Plate

DISTRIBUTION AMPLIFIER

Projector Mount

Under Desk

Rack Mount

Extron MPA 152

Mini Power Amplifier

Extron PMK 300

Projector Mounting Bracket

Extron Power Supply

Plastic Tie

MPA 152 Amplier • Quick Start Guide

Quick Start Guide — MPA 152 Ampliﬁer, cont’d

QS-ii

The MPA 152 ampliﬁer mixes all right channel inputs to a

single signal and all left channel inputs to a second signal. The user may output these signals as stereo or sum them to produce a dual mono signal.

Step 5

Connect power cords to MPA 152 and other audio equipment.

Step 6

Adjust the MPA 152 Plus input level, bass and treble.

a. If connecting the amplier to a

projector, set the projector volume to its lowest point. Then adjust the MPA 152 level potentiometer fully counter clockwise.

b. Set the projector volume to its maximum volume level (no

sound should come out).

c. Return to the MPA 152 and raise the level until sound

distortion rst occurs, then lower slightly until the distortion disappears. This setting ensures that, whatever the projector volume setting may be, no clipping occurs.

d. Adjust bass and treble to preference.

POWER

12V 3A MAX

OUTPUTS

4/8

Ohms

INPUTS

REMOTE

10V VOL/MUTE

MPA 122 PLUS

LISTED 17TT AUDIO/VIDEO APPARATUS

Projector

8 ohm Ceiling Speakers in Parallel

VGA w/ Audio Cable

VCR

Composite Audio RCA

Variable Audio Output

ComLink

IR R

mote

Extron MLC 104 IP

Controller

Extron VCM 100 AAP

Volume/Mute Controller

Extron MPA 152

Mini Power Amplifier

CONFIG

PROJECTOR

VOLUME

MLC 104 IP

OFF

MUTE

VOLUME

VCM 100 AAP

DVD S-video Audio RCA

BASS LEVEL TREBLE

MINI POWER AMPLIFIER

MPA 152

MPA 152 Amplier • Table of Contents

Table of Contents

68-1320-01

Rev. A

02 09

All trademarks mentioned in this manual are the properties of their respective owners.

Chapter One • Introduction .................................................... 1-1

About this Manual .................................................................... 1-2

About the MPA 152 ................................................................... 1-2

MPA 152 Features ...................................................................... 1-3

Chapter Two • Installation ..................................................... 2-1

Mounting the MPA 152............................................................ 2-2

Rack mounting ....................................................................... 2-2

UL guidelines for rack mounting ...........................................2-2

Rack mounting procedures ....................................................2-3

Tabletop placement ............................................................... 2-3

Projector mounting ................................................................ 2-4

Plenum placement .................................................................2-5

Under-furniture mounting .................................................... 2-6

MPA 152 Front Panel Features ............................................... 2-8

MPA 152 Rear Panel Features ................................................ 2-9

Power connector .................................................................. 2-10

Audio inputs ......................................................................... 2-11

Remote control ..................................................................... 2-12

Wiring for remote control ....................................................2-12

Controlling multiple ampliers with

one volume controller ..........................................................2-13

Audio output ........................................................................ 2-14

Chapter Three • Operation ..................................................... 3-1

Setting Up the MPA 152 Amplier....................................... 3-2

Setting input level ................................................................. 3-2

Setting bass and treble .......................................................... 3-2

Remote Control Options .........................................................3-3

Appendix A • Reference Information ............................A-1

Specications ..............................................................................A-2

Included Parts .............................................................................A-4

Accessories ...................................................................................A-5

MPA 152 Amplier • Table of Contents

Table of Contents, cont’d

MPA 152 Ampliﬁer

Chapter One

Introduction

About this Manual

About the MPA 152

MPA 152 Features

MPA 152 Amplier • Introduction

Introduction

1-2

About this Manual

This manual contains information about the Extron MPA 152 Mini Power Amplier, with instructions on how to mount, install, and operate the unit.

About the MPA 152

The Extron MPA 152 is a high performance, compact, power amplier.

The amplier delivers up to 15 watts (rms)/channel stereo or dual mono into a 4 ohm sound system, or 8 watts (rms)/channel into an 8 ohm system.

Front panel controls allow easy adjustment of bass and treble volume and input level.

The unit meets UL smoke and re code for in-the-ceiling installations and can be stored in the plenum space of the roof.

Alternatively, the units can be mounted on a tabletop, in a rack, under a desk, or in a projector mounting kit.

POWER

12V

3A MAX

OUTPUTS

4/8

Ohms

INPUTS

REMOTE

10V VOL/MUTE

MPA 122 PLUS

LISTED 17TT AUDIO/VIDEO APPARATUS

Projector

8 ohm Ceiling Speakers in Parallel

VGA w/ Audio Cable

VCR

Composite Audio RCA

Variable Audio Output

ComLink

IR R

emote

Extron MLC 104 IP

Controller

Extron VCM 100 AAP

Volume/Mute Controller

Extron MPA 152

Mini Power Amplifier

CONFIG

PROJECTOR

VOLUME

MLC 104 IP

OFF

MUTE

VOLUME

VCM 100 AAP

DVD S-video Audio RCA

MPA 152 Amplier • Introduction

1-3

MPA 152 Features

Class D digital audio ampliﬁer — For high efciency and less

heat production.

Ripple Steering technology — Produces cleaner, low-emission,

audio output signals.

Fixed switching frequency — Switches at a frequency below the

AM band, which reduces the chance of radio interference.

Three audio inputs — Accepts 1 balanced/unbalanced input

pair (captive screw) and 2 unbalanced pairs (RCA and TRS), providing up to three right and three left channel inputs. All three right inputs are mixed to produce a single right output; all three left outputs are mixed to produce a single left output.

Stereo/Dual Mono toggle switch — Allows the user to choose

between stereo output or to sum the left and right outputs and produce dual mono outputs.

Up to 15 watts (rms)/channel stereo output — Delivers up to

15 watts (rms)/channel, stereo or dual mono, into a 4 ohm speaker system or up to 8 watts (rms)/channel into an 8 ohm system.

Front panel controls — Input level, bass and treble are easily

adjusted from the front panel.

Quick-plug speaker outputs — Speaker output is on a 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 amplier clipping.

Compact size — The ampliers are housed in a 1U high, quarter

rack 3" deep, metal enclosure, which offers exible mounting options.

UL 2043 plenum rated — The MPA 152 meets UL 2043

requirements for heat and smoke release and is suitable for in-the-ceiling installations, allowing the unit to be stored out of sight, with reduced risk of theft.

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. All cables connected to the ampliﬁer must be plenum rated.

MPA 152 Amplier • Introduction

Introduction, cont’d

1-4

MPA 152 Ampliﬁer

Chapter Two

Installation

Mounting the MPA 152

MPA 152 Front Panel Features

MPA 152 Rear Panel Features

MPA 152 Amplier • Installation

Installation

2-2

Mounting the MPA 152

The MPA 152 amplier meets UL 2043 requirements for heat and smoke release and is suitable for in-the-ceiling installations, allowing the unit to be stored out of sight with reduced risk of theft. Alternatively, the 1 U, quarter rack size of these ampliers allows them to be mounted in a variety of convenient locations:

Rack• Tabletop• Projector• Under furniture•

Rack mounting

UL guidelines for rack mounting

The following Underwriters Laboratories (UL) guidelines are relevant to the safe installation of the MPA 152 in a rack:

1. 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) specied by Extron.

2. Reduced air ﬂow — Install the equipment in the rack

so that the equipment gets adequate air ow for safe operation.

3. Mechanical loading — Mount the equipment in the rack

so that uneven mechanical loading does not create a hazardous condition.

4. Circuit overloading — Connect the equipment to

the supply circuit and consider the effect that circuit overloading might have on overcurrent protection and supply wiring. Give appropriate consideration to the equipment nameplate ratings.

5. 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 power strips).

MPA 152 Amplier • Installation

2-3

Rack mounting procedures

The unit can be mounted in the front or rear of any of these rack systems:

RSU 126 — 6" deep 1U rack shelf kit (PN • 60-190-10) RSB 126 — 6" deep 1U basic rack shelf (PN • 60-604-11) RSU 129 — 9.5" deep 1U rack shelf kit (PN • 60-190-01) RSB 129 — 9.5" deep 1U basic rack shelf (PN • 60-604-02)

To rack mount the MPA 152, follow these directions:

1. If necessary, remove rubber feet from the bottom of the unit.

2. Secure the MPA 152 to the shelf with two 4-40 x 3/16"

screws in opposite corners of the base (see gure 2-1 below).

3. Install false faceplate(s) or other unit(s) to the rack shelf.

4. Attach the shelf to the rack with the four provided

10-32 x 3/4" bolts.

Use 2 mounting holes on opposite corners.

(2) 4-40 x 3/16" Screws

1U Universal Rack Shelf

Both front false faceplates use 2 screws.

1/4 Rack Width Front False Faceplate

1/2 Rack Width Front False Faceplate

Figure 2-1 — Rack mounting

Tabletop placement

Attach the four provided rubber feet to the bottom of the unit and place it in any convenient location.

MPA 152 Amplier • Installation

Installation, cont’d

2-4

Projector mounting

The instructions for mounting the amplier near the projector, using the PMK 300 projector mounting kit (PN 70-374-01), are shown below. For instructions on using other Extron projector mounting kits, consult the user guide for that kit.

1. If necessary, remove the rubber feet from the bottom of the

MPA 152.

2. Mount the receiver to any of the bracket's three mounting

plates. The unit should be vertically mounted with the rear panel, housing the input and output connectors, facing downwards.

Extron PMK 300

Multi Product Projector Mount Kit

U-Bolt

Rubber Pad

Backing Brace

Clamping Plate

Figure 2-2 — Projector mounting

On the side mounting plates, the device is typically

mounted on the outside of the bracket. On the front mounting plate, the device is mounted on the inside of the bracket.

MPA 152 Amplier • Installation

2-5

a. Use the two 4-40 x 3/16" screws (provided) to secure

the amplier to the bracket

b. If required, secure the power supply using the plastic

ties provided with the kit.

The projector pole can be clamped to the back surface of

the clamping plate on the PMK 300, as shown in the ﬁgure on the previous page.

Alternatively, the PMK 300 has a hole in the bottom plate that allows the projector pole to be inserted through the center of the plate. In this conﬁguration, slide the PMK 300 up from the bottom of the pole before the projector is installed.

3. Attach the rubber pad to the surface of the clamping plate

that will be in contact with the pole.

4. Place the U-bolt around the projector pole and insert the

two ends through the slotted holes in the clamping plate and then through the round holes in the backing brace.

The provided U-bolt ﬁts a pole with an external diameter

of 1.5" to 2.0". For larger or smaller diameter poles, obtain a U-bolt from a local hardware store. The slotted holes in the clamping plate can accommodate U-bolts that are 1.0" to 2.5" in width.

5. Secure the bracket to the projector pole with the U-bolt and

the provided hex nuts and washers. Use an appropriatelysized socket wrench to tighten the hex nuts.

Plenum placement

The MPA 152 meets UL 2043 requirements for heat and smoke release and can be installed in the ceiling plenum space.

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. All cables connected to the ampliﬁer must be plenum rated.

MPA 152 Amplier • Installation

Installation, cont’d

2-6

Under-furniture mounting

The MPA 152 amplifer can be mounted under furniture using the optional MBU 123 mounting kit (PN 70-212-01):

1. Attach the mounting brackets to the MPA 152 with the

provided machine screws as shown in the gure below.

2. Hold the amplier with the attached brackets against the

underside of the table or other furniture. Mark the location of the screw holes of the bracket on the mounting surface.

3. Drill 3/32" (2 mm) diameter pilot holes, 1/4" (6.3 mm)

deep in the mounting surface at the marked locations.

4. Insert #8 wood screws into the four pilot holes. Tighten

each screw into the mounting surface until just less than 1/4" of the screw head protrudes.

5. Align the amplier so that the screw heads pass through

the slots in the brackets and the unit is resting rmly against the bottom surface of the furniture.

Figure 2-3 — Under furniture mounting

6. Slide the unit slightly forward or back. Tighten all four

screws to secure it in place.

MPA 152 Amplier • Installation

2-7

MPA 152 Amplier • Installation

Installation, cont’d

2-8

MPA 152 Front Panel Features

The illustration below shows the front panel of the MPA 152.

BASSLEVEL TREBLE

MINI POWER AMPLIFIER

MPA 152

STEREO

DUAL MONO

Figure 2-4 — MPA 152 Front Panel Features

Power LED — The green LED is lit when the unit receives

power.

Stereo/Dual Mono toggle switch — Allows the user to choose

between stereo output for stereo program speakers or dual mono output for mono ceiling speakers

Potentiometers — Three front panel potentiometers are used to

optimize level, bass, and treble settings.

MPA 152 Amplier • Installation

2-9

MPA 152 Rear Panel Features

The illustration below shows the rear panel of the MPA 152.

POWER

12V

3A MAX

OUTPUT

4/8

OHMS

CLASS 2 WIRING DO NOT GROUND

OR SHORT

SPEAKER OUTPUTS!

INPUTS

REMOTE

VOL/MUTE

10V 50mA

MPA 152

C US

LISTED 17TT AUDIO/VIDEO APPARATUS

4 5 6 987

Figure 2-5 — MPA 152 Rear Panel Features

Power connector — Connect the 12 V external power supply to

the amplier using the 2-pole captive screw connector

RCA input connectors — These female RCA connectors accept

line level, mono or stereo, audio sources.

3.5 mm stereo input — This input accepts a 3.5 mm

tip-ring-sleeve (TRS) stereo jack.

Balanced or unbalanced audio input connector — Connect

balanced or unbalanced, mono or stereo, audio to this 5-pole,

3.5 mm captive screw connector.

Remote input connector — This 3-pole 3.5 mm captive screw

connector allows remote control of volume or muting of audio.

Speaker connector — Connect the speakers to this socket using

quick-plug 4-pole, 5 mm captive screw connector.

MPA 152 Amplier • Installation

Installation, cont’d

2-10

Power connector

Connect the two pole, 3.5 mm captive screw connector from the power supply (provided) to this socket on the rear panel. Ensure the connections have the correct polarity as shown in the illustration below:

Power Receptacle

Power Supply

Output Cord

SECTION A–A

RidgesSmooth

A A

DC Power Cord Captive Screw Connector

AC Power Cord

Ground +12 VDC

External

Power Supply

(12 VDC, 3 A )

POWER

12V

3A MAX

Figure 2-6 — Connecting power

The length of the exposed wires in the stripping process

is critical. The ideal length is 3/16” (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.

Do not tin the wires. Tinned wire does not hold its

shape and can become loose over time.

MPA 152 Amplier • Installation

2-11

Audio inputs

INPUTS

Figure 2-7 — Audio inputs

RCA connectors — Two connectors

(left and right) accept unbalanced, line level audio signals. The input can be stereo (using two RCA jacks) or mono (using a single RCA jack plugged into the left/ mono socket). If unused, the connectors automatically terminate to lower the noise oor.

3.5 mm TRS connector — This

connector accepts unbalanced, line level audio signals. If unused, the connector automatically terminates to lower the noise oor.

Captive Screw connector — This

5-pole, 3.5 mm captive screw input accepts balanced or unbalanced, mono or stereo, line level signals.

The length of the exposed wires in the stripping process

Do not tin the wires. Tinned wire does not hold its

shape and can become loose over time.

The three left channel inputs (RCA, TRS and captive screw) and three right channels are mixed to provide a single left channel output. The three right channel inputs are mixed to provide a single right channel output.

Depending on the position of the front panel toggle switch, the right and left channels may be output as a stereo signal, or summed and output as a dual mono signal.

Tip (+)

Sleeve ( )

RCA Connector

Sleeve ( )

Ring (R)

Tip (L)

3.5 mm Stereo

Plug Connector

Balanced audio

Tip

Ring

Tip

Ring

L R

Sleeves

Unbalanced audio

Tip

Sleeve

Tip

L R

MPA 152 Amplier • Installation

Installation, cont’d

2-12

Remote control

Wiring for remote control

This 3-pin, captive screw connector allows a wall-mounted audio controller or MediaLink product to control volume and mute levels remotely.

Options for remote control include Extron's VC 50 (PN 70-530-02), VCM 100 AAP (PN 70-396-x1), VCM 100 MAAP (PN 70-397-x1) and MLA VC10 (PN 60-502-01).

Third party 10k potentiometer volume controllers can also be connected to this port.

The length of the exposed wires in the stripping process

Do not tin the wires. Tinned wire does not hold its

shape and can become loose over time.

Wire the the remote control connector to the VCM 100 MAAP as shown in the gure and instructions below:

GND (Pin 3)

Volume Pot 10K Ohms

Vol/Mute (Pin 2)

10 V (Pin 1)

Mute Switch

REMOTE

Figure 2-8 — Wiring diagram for remote control

Pin 1 is 10 V DC reference voltage.• Pin 2 (VOL/MUTE) has two functions:•

a. It can be used as a variable voltage input. The volume

control range DC voltage range is 0 to 10 V, with 0 V giving full attenuation and 10 V giving maximum volume.

b. It can be used for remote control muting. Sound is

muted while the mute pin is shorted to ground.

Pin 3 is ground.•

All nominal levels are at ± 10%

REMOTE

VOL/MUTE

10V50mA

MPA 152 Amplier • Installation

2-13

Controlling multiple ampliﬁers with one volume controller

Several MPA 152 units can be daisy-chained so that one volume controller can simultaneously regulate the volume of all the ampliers.

As additional ampliﬁers are added to the daisy chain,

the sensitivity of the volume potentiometer will change. The maximum volume level (fully clockwise) will not be 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 MPAs 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 Vol/Mute and Ground pin of the ﬁrst MPA in the chain.

To regulate multiple ampliers with a single volume controller, follow these instructions:

1. Attach all three pins of the volume controller to the

corresponding pins on the rst MPA 152 unit only (ground to ground; Mute/Vol to Mute/Vol; and 10 V to 10 V).

2. Use jumper wires to connect the Vol/Mute pins of the rst

and each successive amplier.

3. Use jumper wires to connect the ground pins of the rst and

each successive amplier.

10V

VOL/MUTE

50mA10V

VOL/MUTE

50mA 10V

VOL/MUTE

50mA

10V

VOL/MUTE

Extron VCM 100 AAP

Extron MPA 152 daisy chain

Figure 2-9 — Controlling multiple ampliﬁers with one volume controller

MPA 152 Amplier • Installation

Installation, cont’d

2-14

Audio output

This 4-pole, 5 mm captive screw connector is used to connect the amplier to the speakers.

All right channel input signals are mixed and summed to produce a single, right channel output; likewise, all left channel input signals are mixed and summed to produce a single, left channel output

If the front panel switch is set to stereo, the output will be stereo; if the front panel switch is set to mono, the right and left channels will be mixed and summed for a dual mono output.

With an 8 ohm load, the amplier produces up to 8 watts/ channel. With a 4 ohm load, the amplier produces up to 15 watts per channel.

Do not short the + and - outputs to each other, as

this will damage the ampliﬁer.

The length of the exposed wires in the stripping process

Do not tin the wires. Tinned wire does not hold its

shape and can become loose over time.

OUTPUT

4/8

OHMS

MPA 152 Ampliﬁer

Chapter Three

Operation

Setting up the MPA 152 Ampliﬁer

Remote Control Options

MPA 152 Amplier • Operation

Operation

3-2

Setting Up the MPA 152 Ampliﬁer

Setting input level

Adjust the MPA 152 input level, bass as follows:

1. Unplug the remote plug from the unit.

2. Turn the level potentiometer fully counterclockwise.

3. Set the volume of the audio source to its maximum level.

No sound should come out.

4. Slowly increase the MPA 152 level until sound distortion

starts to occur. Lower the level slightly until the distortion disappears. This setting will ensure that, whatever the volume setting of the audio source, no clipping will occur.

Setting bass and treble

Adjust the MPA 152 bass and treble as follows:

1. Use the bass potentiometer to increase or decrease the bass

shelving ±10 dB at 100 Hz and below.

2. Use the treble potentiometer to increase or decrease the

bass shelving ±10 dB at 10 kHz and above.

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 at the center detent, ﬂat response is achieved.

MPA 152 Amplier • Operation

3-3

Remote Control Options

POWER

12V

3A MAX

OUTPUTS

4/8

Ohms

INPUTS

REMOTE

10V VOL/MUTE

MPA 122 PLUS

LISTED 17TT AUDIO/VIDEO APPARATUS

Projector

8 ohm Ceiling Speakers in Parallel

VGA w/ Audio Cable

VCR

Composite Audio RCA

Variable Audio Output

ComLink

IR R

mote

Extron MLC 104 IP

Controller

Extron VCM 100 AAP

Volume/Mute Controller

Extron MPA 152

Mini Power Amplifier

CONFIG

PROJECTOR

VOLUME

MLC 104 IP

OFF

MUTE

VOLUME

VCM 100 AAP

DVD S-video Audio RCA

Figure 3-1 — Remote Control Options

Using the projector's IR remote — For a projector with variable

audio outputs, connect the projector audio output to the MPA 152 audio input. Use the projector's IR remote to control the projector's volume, which effectively controls the volume of the MPA 152.

Extron VCM 100 AAP volume and mute control — There are a

variety of options for a projector without variable audio outputs, or for a system designed to control MPA 152 volume directly. See page 2-12 for more information.

Using a MediaLink™ Controller — For a projector with variable

audio output, connect the projector audio output to the MPA 152 audio input. Use a MediaLink controller to adjust the projector's volume via RS-232. MediaLink controllers can also use IR remote to adjust the projector's volume and thus the input to the amplier.

MPA 152 Amplier • Operation

Operation, cont’d

3-4

MPA 152 Ampliﬁer

Appendix A

Reference Information

Speciﬁcations

Included Parts

Accessories

MPA 152 Amplier • Reference Information

Reference Information

A-2

Speciﬁcations

Audio

Gain

Balanced ............................. 25x (28 dB)

Unbalanced ........................ 50x (34 dB)

Stereo channel separation ............ >60 dB @ 1 kHz

CMRR .............................................. 74 dB @ 1 kHz

Bass adjustment ............................. ± 10 dB @ 80 Hz (reference) to 1 kHz

(2 dB tolerance)

Treble adjustment .......................... ± 10 dB @ 10 kHz (reference) to 1 kHz

(2 dB tolerance)

Audio input

Number/Signal Type.................... 1 stereo, balanced/unbalanced input

2 stereo, unbalanced inputs (The three inputs are individually buffered and mixed together.)

Connectors ..................................... (1) 3.5 mm captive screw connector, 5 pole

(main input) (1) 3.5 mm mini audio jack (tip, ring, sleeve) 1 pair RCA

Impedance ...................................... > 10k ohms, balanced/unbalanced, DC

coupled

Nominal level ................................ +4 dBu (1.23 Vrms) balanced or

-10 dBV (316 Vrms) unbalanced

Maximum level .............................. -3 dBV (unbalanced), +3 dBV (balanced)

at 1% THD+N

Input level sensitivity

Balanced ............................. -10 dBV

Unbalanced ........................ -16 dBV

0 dBu = 0.775 Vrms, 0 dBV = 1 Vrms, 0 dBV 2 dBu

Audio output

Number/Signal type .................... 1 stereo or 2 mono (2 channels total)

Connectors ..................................... (1) 5 mm captive screw connector, 4 pole

Minimum load impedance .......... 4 ohms

Amplier Type ............................... Class D

MPA 152 Amplier • Reference Information

A-3

Output power ................................ 8 watts (rms) per channel, 8 ohms, 1 kHz,

< 1% THD 15 watts (rms) per channel, 4 ohms, 1 kHz,

< 1% THD

Frequency Response ..................... 20 Hz to 20 kHz, ±3 dB @ 1 watt output

THD + Noise .................................. 0.15% @ 1 kHz at nominal level

(1 watt, 8 ohm load)

S/N .................................................. 74 dB @ 20 Hz to 20 kHz at maximum

output (unweighted with balanced input)

Damping factor .............................. >30 (with a 4 ohm load)

Control/remote — ampliﬁer

Control port .................................... (1) 3.5 mm captive screw connector, 3 pole

Pin conguration ........................... Pin 1 = +10 VDC, 50 mA (max.),

Pin 2 = volume/mute (variable voltage),

Pin 3 = GND

Volume control voltage range ..... 0 V (mute) to 10 V (maximum volume)

General

External power supply ................. 100 VAC to 240 VAC, 50/60 Hz, external;

to 12 VDC, 3 A (max.), regulated

Power input requirement ............. 12 VDC, up to 3A

Temperature/humidity ................ Storage: -40 to +158 °F (-40 to +70 °C)/

10% to 90%, noncondensing

Operating: +32 to 122 °F (0° to 50 °C)/

10% to 90%, noncondensing

Cooling ........................................... Convection, no vents

Mounting

Rack mount ........................ Yes, with optional 1U, 9.5" deep rack shelf

(RSU 129, # 60-190-01; or RSB 129,

#60-604-01); 1U, 6" deep rack shelf

(RSU 126, # 60-190-10; or RSB 126,

#60-604-10); or VersaTools® 1U, 3.5" deep

rack shelf (RSF 123, #60-190-20; or RSB 123

#60-604-20)

Furniture mount ................ Yes, with optional VersaTools® MBU 123

mini under-desk mounting kit (#70-212-01)

Projector mount ................. Above-projector mountable with optional

PMK 300 Multi-Product Projector

Mounting Kit (#70-374-01)

Enclosure type ............................... Metal

MPA 152 Amplier • Reference Information

Reference Information, cont’d

A-4

Enclosure dimensions ................... 1.7" H x 4.3" W x 3" D

(1U high, quarter rack wide) (4.3 cm H x 10.9 cm W x 7.6 cm D)

(Depth excludes connectors.)

Product weight .............................. 0.6 lbs (0.3 kg)

Shipping weight ............................ 3 lbs (2 kg)

Vibration ......................................... ISTA 1A in carton (International Safe

Transit Association) Regulatory Compliance

Safety ................................... CE, CUL, UL

UL rated for use in plenum airspaces;

meets UL 2043 for heat and smoke release,

excluding the power supply; meets

UL 60065 for safety.

EMI/EMC .......................... CE, C-tick, FCC Class B, ICES, VCCI

MTBF ............................................... 30,000 hours

Warranty ......................................... 3 years parts and labor

All nominal levels are at ±10%

Speciﬁcations are subject to change without notice.

Included Parts

These items are included in each order for an MPA 152:

Included parts Replacement

part number

MPA 152 60-844-01 External 12 V DC, 3 A power supply IEC power cord (1) 4-pole 5 mm terminal block plug (1) 5-pole 3.5 mm captive screw plug

(1) 3-pole 3.5 mm captive screw plug

(1) 2-pole 3.5 mm power captive screw plug

Setup Guide — MPA 152

MPA 152 Amplier • Reference Information

A-5

Accessories

Accessories Part number

MBB 100 Back of rack mounting kit 70-367-01 MBU 123 Mini under-desk mounting kit 70-212-01 PMK 300 Projector mounting kit 70-374-01 PMK 450 Projector mounting kit 70-618-03 RSB 123 (3.5" deep, 1U basic rack shelf)

60-604-20 RSF 123 (3.5" deep, 1U rack shelf kit) 60-190-20 RSB 126 (6" deep, 1U basic rack shelf) 60-604-10 RSU 126 (6" deep, 1U rack shelf kit) 60-190-10 RSB 129 (9.5" deep, 1U basic rack shelf) 60-604-01 RSU 129 (9.5" deep, 1U rack shelf kit) 60-190-01 VC 50 Volume control wall plate 70-530-02

VCM 100 AAP Volume/mute - AAP 70-396-11 VCM 100 MAAP Volume/mute - MAAP 70-397-11 MLA VC10 Volume control module 60-502-01 SPK 18 Pre-cut speaker cable 26-627-25 SI 3 (Black, White) 42-105-xx SI 3CT LP ceiling speakers 42-103-03 SI 26 (Black, White) 42-072-xx SI 26 X 42-067-03

MPA 152 Amplier • Reference Information

Reference Information, cont’d

A-6

Extron’s Warranty

Extron Electronics 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 Electronics 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 USA 1001 East Ball Road

Anaheim, CA 92805

U.S.A.

Europe, Africa, and the Middle East: Extron Europe

Hanzeboulevard 10 3825 PH Amersfoort

The Netherlands Asia:

Extron Asia 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

China: Extron China 686 Ronghua Road Songjiang District Shanghai 201611 China

Middle East: Extron Middle East

Dubai Airport Free Zone F12, 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 nonExtron authorized modiﬁcation to the product.

If it has been determined that the product is defective, please call Extron and ask for an Applications Engineer at (714) 491-1500 (USA), 31.33.453.4040 (Europe), 65.6383.4400 (Asia), or 81.3.3511.7655 (Japan) to receive an RA# (Return Authorization number). This will begin the repair process as quickly as possible.

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.

Extron USA - West

Headquarters

+800.633.9876

Inside USA / Canada Only

+1.714.491.1500 +1.714.491.1517 FAX

Extron USA - East

+800.633.9876

Inside USA / Canada Only

+1.919.863.1794 +1.919.863.1797 FA X

Extron Europe

+800.3987.6673

Inside Europe Only

+31.33.45 3.4040 +31.33.45 3.4050 FAX

Extron Asia

+800.7339.8766

Inside Asia Only

+65.6383.4400 +65.6383.4664 FAX

Extron Japan

+81.3.3511.7655 +81.3.3511.7656 FAX

Extron China

+400.883.1568

Inside China Only

+86.21.3760.1568 +86.21.3760.1566 FAX

Extron Middle East

+971.4.2991800 +971.4.2991880 FAX

Extron electronics MPA 152 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual