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MPA 401-70V • Introduction
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MPA 401-70V Features
Patented CDRS
™
(Class D Ripple Suppression) — CDRS is an Extron patented
technology that eliminates high frequency switching ripple and EMI
emissions found in all Class D amplifiers. CDRS dramatically improves
audio performance over conventional Class D amplifier designs and enables
Extron power amplifiers to be situated near wireless A/V devices without RF
interference.
UL 2043 plenum rated — The MPA 401-70V meets UL 2043 for smoke and heat
release for installation within a plenum airspace above a drop ceiling. Above-
the-ceiling placement conceals the amplifier to prevent theft and is convenient
for installing equipment when space inside the room is limited.
C
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. If the
amplifier is placed in a plenum space, all cables to and from it must also be
plenum rated.
Balanced and unbalanced buffered audio inputs — The MPA 401-70V amplifier
accepts balanced or unbalanced, stereo or mono audio input signals on a
captive screw connector, and unbalanced audio on both RCA connectors and a
3.5 mm stereo mini jack.
N
The MPA 401-70V amplifier mixes all right channel inputs to a single signal and
all left channel inputs to a second signal. The right signal and left signal are then
summed to produce a mono signal.
The three stereo inputs are individually buffered and can be connected to three
separate sources at the same time without altering performance.
Quick-plug speaker outputs — Speaker output is on a 5 mm screw lock captive
screw connector for quick installation.
ENERGY STAR
®
Qualified Amplifier — The MPA 401-70V amplifier is an
ENERGY STAR qualified amplifier and energy efficient product that conserves
energy and reduces costs.
Auto-standby with fast power up — automatically places the amplifier into
standby after 25 minutes of inactivity. It quickly returns to full power status
in less than one second upon signal detection. The amplifier consumes just 6
watts when idle and less than 1 watt in standby mode.
Front panel bass, treble, and input level controls — Bass, treble, and input level
are easily adjusted from the front panel.
Fanless design — The MPA 401 does not require fans or vents for cooling, ensuring
quiet, reliable operation.
Automatic clip limiter — Detects actual onset of clipping by comparing input
and output waveforms. Gain is automatically reduced with a slow attack and
fast release to eliminate clipping. This advanced limiter design protects the
speakers from clipping distortion and offers superior sonic characteristics
compared to limiters that use signal compression.
Remote volume and mute control port — A rear panel, three-pin captive screw
remote input connector allows remote adjustment of volume and muting. In
basic installations without third-party control systems, this port allows the
MPA 401 to be remotely controlled using the optional Extron VCM 100 analog
volume and mute controller or VC 50 analog volume controller.
Compact size — The 1U, quarter rack width, 6" deep metal enclosure, offers
flexible mounting options.
External universal power supply included (part # 70-725-01) — provides
worldwide power compatibility.