User Guide Audio MPA 152 ENERGY STAR® Qualified Stereo Mini Power Amplifier 68-1320-02 Rev.
Safety Instructions Safety Instructions • English WARNING: This symbol, D, when used on the product, 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. ATTENTION: This symbol, I, when used on the product, is intended to alert the user of important operating and maintenance (servicing) instructions in the literature provided with the equipment.
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 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. There is no guarantee that interference will not occur.
Contents Specifications Availability...................................iii Introduction............................................................ 1 Important Safety Instructions............................... 1 About the MPA 152............................................. 2 MPA 152 Features............................................... 2 Panels and Cabling............................................... 4 MPA 152 Rear Panel Features............................. 4 Power Connector........................
MPA 152 • Contents vi
Introduction This manual contains information about the Extron MPA 152 mini power amplifier with instructions for experienced installers on how to install, configure, and operate the equipment. Unless otherwise specified, references in this manual to the “amplifier” or “MPA” relate to the features or operation of the MPA 152. This section provides the following information: • Important Safety Instructions • About the MPA 152 • MPA 152 Features Important Safety Instructions 1. Read these instructions.
About the MPA 152 The MPA 152 is an ENERGY STAR® qualified, high performance, compact, power amplifier. It delivers up to 15 watts (rms) per channel stereo or dual mono into a 4 ohm sound system, or 8 watts (rms) per 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 fire code for in-the-ceiling installations and can be stored in the plenum space of the roof.
Stereo or Dual Mono toggle switch — Allows the user to choose between stereo output or to combine the left and right outputs and produce dual mono outputs. Up to 15 watts (rms) per channel stereo output — Delivers up to 15 watts (rms) per channel, stereo or dual mono, into a 4 ohm speaker system or up to 8 watts (rms) per channel into an 8 ohm system. Front panel controls — Input level, bass and treble are easily adjusted from the front panel.
Panels and Cabling This section discusses the MPA 152 rear panel features and cabling. MPA 152 Rear Panel Features The rear panel of the MPA 152 (shown in Figure 2 below) allows the user to connect power, audio input, speakers, and remote control. MPA 152 1 4/8 OHMS L INPUTS POWER 12V 0.6A MAX OUTPUT CLASS 2 WIRING DO NOT GROUND OR SHORT SPEAKER OUTPUTS! R REMOTE L R R L 10V 2 3 4 5 VOL/MUTE 50mA 6 Figure 2.
Power Connector a Power connector — The MPA 152 ships with the Extron 24 W PS 1220 desktop power supply (part number 70-967-01). ATTENTION: When the PS 1220 power supply is connected to the MPA 152, it must not be shared with any other devices. MPA 152 Amplifier PS 1220 Power Supply POWER DC Power Outputs Power Receptacle AC Power Cord 12V 0.6 A MAX DO NOT USE DC Power Cord Captive Screw Connector Captive Screw Connector Power Supply Output Cord Figure 3.
Audio Inputs INPUTS L Figure 4. b c R L R Audio Inputs RCA input connectors — These 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 socket). If unused, the connectors automatically terminate to lower the noise floor. Tip (+) 3.5 mm stereo input — This Tip-Ring-Sleeve (TRS) connector accepts unbalanced, line level audio signals.
Remote Control e REMOTE Remote input connector — This 3-pin, captive screw connector allows a wall‑mounted audio controller or MediaLink product to control volume and mute levels remotely. 10V Wiring for remote control VOL/MUTE 50mA Options for remote control include the Extron VC 50, VCM 100 AAP, VCM 100 MAAP, VCM 200 series, and MLA VC10 Plus. For information about part numbers, see the list of Optional Accessories on page 12.
To regulate multiple amplifiers with a single volume controller, follow these instructions: 1. Attach all three pins of the volume controller to the corresponding pins on the first MPA 152 unit only (ground to ground; Vol/Mute to Vol/Mute; and 10 V to 10 V). 2. Use jumper wires to connect the Vol/Mute pins of the first amplifier and each successive amplifier. 3. Use jumper wires to connect the ground pins of the first amplifier and each successive amplifier.
Setup and Operation This section discusses: • Front Panel Features • Remote Control Options • Troubleshooting Front Panel Features This section describes how to use the controls on the MPA 152 front panel (shown in figure 7 below) to configure the amplifier and how to set up the remote control options. STEREO LEVEL BASS TREBLE 1 DUAL MONO MPA 152 MINI POWER AMPLIFIER 2 3 Figure 7. MPA 152 Front Panel a Power LED — The LED lights green when the MPA 152 unit is receiving power and active.
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 80 Hz and below. 2. Use the Treble potentiometer to increase or decrease the treble shelving ±10 dB at 10 kHz and above. NOTE: Turning the Bass or Treble potentiometers counterclockwise will decrease the output at the specified frequencies. Turning the potentiometers clockwise will increase the output.
Troubleshooting Under different circumstances, the front panel LED lights green or amber, which provides diagnostic information. Amplifier Fails to Exit Standby Mode Promptly Power LED Color Problem Description Problem Solution Amber No output signal. • No input detected: verify that there is an input signal. If a signal is present, raise the level of the source signal. Green No output signal. • The amplifier may be in mute mode. Check the remote port.
Reference Material This section provides information about: • Included Parts • Optional Accessories • Mounting Included Parts Description Part Number MPA 152 60-844-02 PS 1220 external 12 V, 2 A power supply 70-967-01 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 MPA 152 Setup Guide Optional Accessories Description Part Number RSB 123 (3.
Description Part Number 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 VCM 200 D Volume control wall plate 70-883-02 VCM 200 EU Volume control wall plate 70-884-05 VCM 200 MK Volume control wall plate 70-884-03 MLA VC10 Plus Volume control module 60-1090-01 SM 3 compact, full range speakers with SpeedMount (Black, White) 42-133-xx SI 3CT LP full range ceiling speakers 42-103-03 SI 26 two way surface mount speake
Rack Mounting UL Guidelines for Rack Mounting The following Underwriters Laboratories (UL) guidelines are relevant to the safe installation of this product 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.
ATTENTION: Use only the two holes indicated in the diagram below for mounting the MPA 152. The other four holes anchor stand-offs for the internal circuit boards; using them may damage the amplifier and will not provide secure mounting for the unit. 1.44" #4-40 Thread Thru Rack Mounting 3.67" #4-40 Thread Thru Rack Mounting Back of the Rack Mounting The unit can be mounted at the back of a rack rail using the MBB 100 mounting kit (part number 70-367-01). Follow the instructions provided with the kit.
Extron Warranty Extron Electronics warrants this product against defects in materials and workmanship for a period of three years from the date of purchase.
