User’s Manual MPA 152 Mini Power Amplifier 68-1320-01 Rev.
Precautions Safety Instructions • English This symbol is intended to alert the user of important operating and maintenance (servicing) instructions in the literature provided with the equipment. This symbol 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. Caution Read Instructions • Read and understand all safety and operating instructions before using the equipment.
安全须知 • 中文 警告 这个符号提示用户该设备用户手册中 有重要的操作和维护说明。 电源 • 该 设 备 只 能 使 用 产 品 上 标 明 的 电 源 。 设 备 必须使用有地线的供电系统供电。 第三条线 （地线）是安全设施，不能不用或跳过。 这个符号警告用户该设备机壳内有暴 拔掉电源 • 为安全地从设备拔掉电源，请拔掉所有设备后 或桌面电源的电源线，或任何接到市电系统的电源线。 露的危险电压，有触电危险。 电源线保护 • 妥善布线， 避免被踩踏，或重物挤压。 注意 阅读说明书 • 用 户 使 用 该 设 备 前 必 须 阅 读 并 理 解所有安全和使用说明。 保存说明书 • 用户应保存安全说明书以备将来使 用。 遵守警告 • 用户应遵守产品和用户指南上的所有安 全和操作说明。 维护 • 所有维修必须由认证的维修人员进行。 设备内部 没有用户可以更换的零件。为避免出现触电危险不要自 己试图打开设备盖子维修该设备。 通风孔 • 有些设备机壳上有通风槽或孔，它们是用来防止 机内敏感元件过热。 不要用任何东西挡住通风孔。 锂电池 • 不正确的更换电池会有爆炸的危险。 必须使用 与厂家推荐的相同
Important Safety Instructions 1) 2) 3) 4) 5) 6) 7) Read these instructions. Keep these instructions. Heed all warnings. Follow all instructions. Do not use this apparatus near water. Clean only with dry cloth. Do not block any ventilation openings. Install in accordance with the manufacturer's instructions. 8) Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat.
Quick Start Guide — MPA 152 Amplifier To install and set up an MPA 152 Mini Power Amplifier, follow these steps: Step 1 Turn all of the equipment off and disconnect it from power sources. Step 2 Mount the MPA 152 on a rack, under a desk, or on a projector, as illustrated below. Extron MPA 152 Mini Power Amplifier Extron PMK 300 Projector Mounting Bracket Extron Power Supply Plastic Tie Under Desk Projector Mount DIS TR IBU TIO N AM PL IFIE R 3.
Quick Start Guide — MPA 152 Amplifier, cont’d N The MPA 152 amplifier mixes all right channel inputs to a single signal and all left channel inputs to a second signal. The user may output these signals as stereo or sum them to produce a dual mono signal. Step 5 Connect power cords to MPA 152 and other audio equipment. Step 6 Adjust the MPA 152 Plus input level, bass and treble. a. LEVEL If connecting the amplifier to a projector, set the projector volume to its lowest point.
Table of Contents Chapter One • Introduction ..................................................... 1-1 About this Manual ..................................................................... 1-2 About the MPA 152 . .................................................................. 1-2 MPA 152 Features ....................................................................... 1-3 Chapter Two • Installation ...................................................... 2-1 Mounting the MPA 152 ........................
Table of Contents, cont’d ii MPA 152 Amplifier • Table of Contents
MPA 152 Amplifier 1 Chapter One Introduction About this Manual About the MPA 152 MPA 152 Features
Introduction About this Manual This manual contains information about the Extron MPA 152 Mini Power Amplifier, with instructions on how to mount, install, and operate the unit. About the MPA 152 The Extron MPA 152 is a high performance, compact, power amplifier. The amplifier delivers up to 15 watts (rms)/channel stereo or dual mono into a 4 ohm sound system, or 8 watts (rms)/channel into an 8 ohm system. Front panel controls allow easy adjustment of bass and treble volume and input level.
MPA 152 Features Class D digital audio amplifier — For high efficiency and less heat production. Ripple Steering technology — Produces cleaner, low-emission, audio output signals. Fixed switching frequency — Switches at a frequency below the AM band, which reduces the chance of radio interference. Three audio inputs — Accepts 1 balanced/unbalanced input pair (captive screw) and 2 unbalanced pairs (RCA and TRS), providing up to three right and three left channel inputs.
Introduction, cont’d 1-4 MPA 152 Amplifier • Introduction
MPA 152 Amplifier 2 Chapter Two Installation Mounting the MPA 152 MPA 152 Front Panel Features MPA 152 Rear Panel Features
Installation Mounting the MPA 152 The MPA 152 amplifier meets UL 2043 requirements for heat and smoke release and is suitable for in-the-ceiling installations, allowing the unit to be stored out of sight with reduced risk of theft.
Rack mounting procedures The unit can be mounted in the front or rear of any of these rack systems: • RSU 126 — 6" deep 1U rack shelf kit (PN 60-190-10) • RSB 126 — 6" deep 1U basic rack shelf (PN 60-604-11) • RSU 129 — 9.5" deep 1U rack shelf kit (PN 60-190-01) • RSB 129 — 9.5" deep 1U basic rack shelf (PN 60-604-02) To rack mount the MPA 152, follow these directions: 1. If necessary, remove rubber feet from the bottom of the unit. 2.
Installation, cont’d Projector mounting The instructions for mounting the amplifier near the projector, using the PMK 300 projector mounting kit (PN 70-374-01), are shown below. For instructions on using other Extron projector mounting kits, consult the user guide for that kit. 1. If necessary, remove the rubber feet from the bottom of the MPA 152. 2. Mount the receiver to any of the bracket's three mounting plates.
a. Use the two 4-40 x 3/16" screws (provided) to secure the amplifier to the bracket b. If required, secure the power supply using the plastic ties provided with the kit. N The projector pole can be clamped to the back surface of the clamping plate on the PMK 300, as shown in the figure on the previous page. Alternatively, the PMK 300 has a hole in the bottom plate that allows the projector pole to be inserted through the center of the plate.
Installation, cont’d Under-furniture mounting The MPA 152 amplifer can be mounted under furniture using the optional MBU 123 mounting kit (PN 70-212-01): 1. Attach the mounting brackets to the MPA 152 with the provided machine screws as shown in the figure below. 2. Hold the amplifier with the attached brackets against the underside of the table or other furniture. Mark the location of the screw holes of the bracket on the mounting surface. 3. Drill 3/32" (2 mm) diameter pilot holes, 1/4" (6.
MPA 152 Amplifier • Installation 2-7
Installation, cont’d MPA 152 Front Panel Features The illustration below shows the front panel of the MPA 152. STEREO 1 LEVEL BASS DUAL MONO TREBLE MPA 152 MINI POWER AMPLIFIER 2 3 Figure 2-4 — MPA 152 Front Panel Features a b c 2-8 Power LED — The green LED is lit when the unit receives power.
MPA 152 Rear Panel Features The illustration below shows the rear panel of the MPA 152.
Installation, cont’d Power connector Connect the two pole, 3.5 mm captive screw connector from the power supply (provided) to this socket on the rear panel.
Audio inputs INPUTS L R L R Figure 2-7 — Audio inputs RCA connectors — 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/ mono socket). If unused, the connectors automatically terminate to lower the noise floor. Sleeve ( ) 3.
Installation, cont’d Remote control Wiring for remote control This 3-pin, captive screw connector allows a wall‑mounted audio controller or MediaLink product to control volume and mute levels remotely. REMOTE 10V VOL/MUTE 50mA Options for remote control include Extron's VC 50 (PN 70‑530‑02), VCM 100 AAP (PN 70-396-x1), VCM 100 MAAP (PN 70-397-x1) and MLA VC10 (PN 60-502-01). Third party 10k potentiometer volume controllers can also be connected to this port.
Controlling multiple amplifiers with one volume controller Several MPA 152 units can be daisy-chained so that one volume controller can simultaneously regulate the volume of all the amplifiers. N As additional amplifiers are added to the daisy chain, the sensitivity of the volume potentiometer will change. The maximum volume level (fully clockwise) will not be affected.
Installation, cont’d Audio output This 4-pole, 5 mm captive screw connector is used to connect the amplifier to the speakers.
MPA 152 Amplifier 3 Chapter Three Operation Setting up the MPA 152 Amplifier Remote Control Options
Operation Setting Up the MPA 152 Amplifier Setting input level Adjust the MPA 152 input level, bass as follows: 1. Unplug the remote plug from the unit. 2. Turn the level potentiometer fully counterclockwise. 3. Set the volume of the audio source to its maximum level. No sound should come out. 4. Slowly increase the MPA 152 level until sound distortion starts to occur. Lower the level slightly until the distortion disappears.
Remote Control Options DVD S-video Audio RCA 8 ohm Ceiling Speakers in Parallel PC VGA w/ Audio Cable S UT TP OU US 2 PL MPA 12 L 4/8ms Oh TS T 17T EO TED LIS /VID S DIO ATU AU PAR US AP INPU R R TE MO RE V UTE 10 L/M VO L Extron MPA 152 C WER PO VCR R L V X 12 MA 3A Composite Audio RCA Mini Power Amplifier Variable Audio Output 1 R TO 2 EC OJ PR F OF ComLink 3 ON ME 4 LU VO G NFI CO 4 IP C 10 ML ME 100 LU VO VCM 3 Extron MLC 104 IP Controller TE MU P AA
Operation, cont’d 3-4 MPA 152 Amplifier • Operation
MPA 152 Amplifier A Appendix A Reference Information Specifications Included Parts Accessories
Reference Information Specifications Audio Gain Balanced.............................. Unbalanced......................... Stereo channel separation............. CMRR............................................... Bass adjustment.............................. 25x (28 dB) 50x (34 dB) >60 dB @ 1 kHz 74 dB @ 1 kHz ± 10 dB @ 80 Hz (reference) to 1 kHz (2 dB tolerance) Treble adjustment........................... ± 10 dB @ 10 kHz (reference) to 1 kHz (2 dB tolerance) Audio input Number/Signal Type.............
Output power................................. 8 watts (rms) per channel, 8 ohms, 1 kHz, < 1% THD 15 watts (rms) per channel, 4 ohms, 1 kHz, < 1% THD Frequency Response...................... 20 Hz to 20 kHz, ±3 dB @ 1 watt output THD + Noise................................... 0.15% @ 1 kHz at nominal level (1 watt, 8 ohm load) S/N................................................... 74 dB @ 20 Hz to 20 kHz at maximum output (unweighted with balanced input) Damping factor...............................
Reference Information, cont’d Enclosure dimensions.................... 1.7" H x 4.3" W x 3" D (1U high, quarter rack wide) (4.3 cm H x 10.9 cm W x 7.6 cm D) (Depth excludes connectors.) Product weight............................... 0.6 lbs (0.3 kg) Shipping weight............................. 3 lbs (2 kg) Vibration.......................................... ISTA 1A in carton (International Safe Transit Association) Regulatory Compliance Safety....................................
Accessories Accessories Part number MBB 100 Back of rack mounting kit 70-367-01 MBU 123 Mini under-desk mounting kit 70-212-01 PMK 300 Projector mounting kit 70-374-01 PMK 450 Projector mounting kit 70-618-03 RSB 123 (3.5" deep, 1U basic rack shelf) 60-604-20 RSF 123 (3.5" deep, 1U rack shelf kit) 60-190-20 RSB 126 (6" deep, 1U basic rack shelf) 60-604-10 RSU 126 (6" deep, 1U rack shelf kit) 60-190-10 RSB 129 (9.5" deep, 1U basic rack shelf) 60-604-01 RSU 129 (9.
Reference Information, cont’d A-6 MPA 152 Amplifier • Reference Information
Extron’s Warranty Extron Electronics warrants this product against defects in materials and workmanship for a period of three years from the date of purchase.
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