Extron Electronics MPA 181T User Guide - Manual (Page 7)

MPA 181T • Introduction MPA 181T • Introduction
Introduction
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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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.
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