Extron electronic user manual Introduction, About this Manual, About the MPA 181T, Features

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Introduction

Introduction

About this Manual

This manual contains information about the Extron MPA 181T Mini Power Amplifier with instructions on how to mount and operate the unit.

About the MPA 181T

The Extron MPA 181T is a high performance, compact, single channel power amplifier. The MPA 181T delivers 18 watts (rms) for 70 Volt line level speakers, 14 watts (rms) for 4 ohm speaker loads, and 8 watts (rms) for 8 ohm loads.

The MPA 181T accepts balanced and unbalanced stereo and mono inputs, and outputs a mono audio signal to drive for 4/8 ohm direct speakers or 70 volt line distribution speakers.

Front panel controls are provided for input level, bass, and treble. The front panel also features a limiter switch which automatically reduces the gain to prevent distortion (amplifier clipping). The MPA 181T features remote control capability for volume adjustment and muting. The MPA 181T, housed in a 1U, quarter rack width metal enclosure, can be mounted under a desk, or mounted on a projector.

Features

Class D audio amplifier — The MPA 181T features improved, class D technology for high efficiency and low distortion.

Compact size — The MPA 181T is housed in a 1U high, 1/4 rack width, 6" deep, metal enclosure, allowing this amplifier to fit in many unique applications.

Three balanced and unbalanced audio inputs — Balanced or unbalanced input are available on the captive screw connector, while the 3.5 mm stereo mini jack and RCA connectors provide unbalanced input. The captive screw, RCA and stereo mini jack connectors are actively mixed together, then summed into a mono signal.

Selectable 70V or direct 4/8 ohm output — Fits distribution sound or direct 4/8 ohm applications.

Quick plug speaker outputs — Speaker output is on a captive screw connector for quick installation.

Front panel controls — Input level, bass, and treble can be easily adjusted from the front panel.

Limiter switch — The limiter switch prevents output distortion (clipping) and potential damage to speakers.

Volume and mute remote control — A rear panel, captive screw “Remote” input connector allows for remote control of volume adjustment and muting.

Flexible mounting options — The MPA 181T can be mounted on a rack, projector, or under furniture.

External international power supply — The included autoswitchable, 12 VDC, 3 A external power supply provides worldwide power compatibility

(part #70-380-01).

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MPA 181T • Introduction

MPA 181T • Introduction 1-3

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Contents 68-1082-01 Mini Power AmplifierMPA 181T User’s ManualSafety Instructions English PrecautionsExtron’s Warranty FCC Class A NoticePage Attach the speakers to the MPA 181T Quick Start Guide - MPA 181TStep MPA 181T Quick Start Guide QS-1MPA 181T Table of Contents Table of ContentsChapter 2 Installation and Operation Appendix A Specifications, Part NumbersChapter1One Table of Contents, cont’dAbout this Manual About the MPA 181T Features ii MPA 181T Table of ContentsAbout the MPA 181T FeaturesIntroduction About this ManualChapter2Two Installation and OperationInstallation Overview Mounting the MPA 181T Rear Panel Features Front Panel Features Setting up the MPA 181T AmplifierMounting the MPA 181T Installation and OperationInstallation Overview MPA 181T Installation and OperationFigure 2-2 - Mounting the MPA 181T on the RSU shelf Installation and operation, cont’dUnder-desk mounting Projector mountingFigure 2-5 - MPA 181T back panel Rear Panel FeaturesPower input Figure 2-5 - Mounting the PMKAudio inputs Remote controlFigure 2-6 - Power connector wiring Figure 2-7 - 3.5 mm captive screw audio input connector wiringFigure 2-9 - Output speaker wiring Front Panel FeaturesSetting Up the MPA 181T Amplifier Remote connector wiringChapter3Three Remote Control Options2-12 MPA 181T Installation and Operation Figure 2-12 - Pinout diagram for a third party volume potentiometerFigure 3-1 - Three remote control options Specifications, Part Numbers, and AccessoriesRemote Control Options Specifications Included Parts Optional AccessoriesAudio Specifications, Part Numbers, and AccessoriesSpecifications MPA 181T Specifications, Part Numbers, and AccessoriesIncluded parts Optional AccessoriesAccessories Included PartsA-6 MPA 181T Specifications, Part Numbers, and Accessories Specifications, Part Numbers, Accessories, cont’d
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