Extron electronic MPA 152 PLUS manual MPA 152 Plus Introduction

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