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User Guide
Audio
MPA 401 Series
Mini Power Amplifiers
68-1436-01 Rev. E
06 13
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Safety Instructions Safety Instructions • English Chinese Simplified （简体中文） 警告：D产品上的这个标志意在警告用户该产品机壳内有暴露的危险 WARNING: This symbol, D, when used on the product, is intended to alert the user of the presence of uninsulated dangerous voltage within 电压，有触电危险。 the product’s enclosure that may present a risk of electric shock. 注意：I 产 品 上 的 这个 标 志 意在 提 示用户设备 随 附的用户手 册 中 有 ATTENTION: This symbol, I, when used on the product, is intended 重要的操作和维护(维修）说明。 to alert the user of important operating and mai
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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
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Conventions Used in this Guide Notifications the following are used: ATTENTION: Attention indicates a situation that may damage or destroy the product or associated equipment. NOTE: A note draws attention to important information. Specifications Availability Product specifications are available on the Extron website, www.extron.com.
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Contents Introduction .................................................... 1 Important Safety Instructions .............................. 1 MPA 401-70V and MPA 401-100V Description ... 2 MPA 401-70V and MPA 401-100V Features ....... 3 Rear Panel and Cabling ................................ 4 Rear Panel .......................................................... 4 Power Input ........................................................ 5 Audio Inputs ...................................................
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MPA 401-70V and MPA 401-100V • Contents vi
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Introduction This guide contains information about the Extron MPA 401-70V and MPA 401-100V mini power amplifiers with instructions for experienced installers on how to install, configure, and operate the equipment. Unless otherwise specified, references in this guide to the “amplifier,” “MPA,” or “MPA 401” relate to the features or operation of either amplifier. This section provides the following information: • Important Safety Instructions • MPA 401-70V and MPA 401-100V Description • MPA
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MPA 401-70V and MPA 401-100V Description The Extron MPA 401-70V and MPA 401-100V integrated mini power amplifiers provide mono amplification for speaker systems that require compact and economical audio solutions. Both amplifiers accept balanced or unbalanced, stereo or mono inputs and provide a summed mono output. The MPA 401-70V delivers up to 40 watts (rms) for a high-impedance, 70 V distributed sound system. The MPA 401-100V delivers up to 40 watts (rms) for a high-impedance, 100 V dist
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MPA 401-70V and MPA 401-100V 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 amplifiers meet UL 2043 for smoke and heat release for in
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Rear Panel and Cabling This section describes the rear panel features and cabling of the MPA 401-70V and MPA 401-100V. • Rear Panel • Power Input • Audio Inputs • Remote Input Connector • Speaker Connections Rear Panel The illustration below shows the rear panel of the amplifiers: MPA 401-70V L REMOTE 70V OUTPUT (SUMMED) 10V 50mA POWER (SUMMED) L R R 12V VC G CLASS 2 WIRING 1.5A MAX INPUTS 3 4 6 1 2 5 MPA 401-100V L REMOTE 100V OUTPUT (SUMMED) 10V 50mA POWER (SUMMED) L R R 12V
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Power Input a Power receptacle — A 36 W desktop power supply is provided. ATTENTION: When the PS 1230 power supply is connected to the MPA 401, it must not be shared with any other devices. MPA 401 series PS 1230 Power Supply MPA 401 series Amplifier Amplifier AC Power Cord Smooth Ridges POWER POWER Power Receptacle DC Power Outputs 12V 12V 1.5 A MAX 1.5 A MAX Power Supply Output Cord DO NOT USE DC Power Cord Captive Screw 3/16" SECTION A–A Captive Screw Connector Connector (
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LR LR LR LR Audio Inputs Use the rear panel receptacles (see figure at right) to connect audio sources to the amplifier. Wire the 3 4 L connectors as shown below. The balloon numbers refer (SUMMED) 2 (SUMMED) L R to the figure to the right. R NOTE: The gr ound pins of the input r eceptacles may be labeled or (see the images to the INPUTS right). The wiring and function ar e the same INPUTS whichever way the pr oduct is labeled. L (MONO) 3 4 2 R L (MONO) R Tip (+) b RCA input receptacle
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Remote Input Port e Remote input port — This 3-pin, captive screw REMOTE 10V 50mA port allows a wall-mounted audio controller to 10V 50mA VOL/MUTE control volume and mute levels remotely (see Remote Control Options on page 12 if using a MediaLink controller). VC G NOTE: The r emote contr ol port may be labeled REMOTE in one of two ways (see the diagram to the right). The wiring and function ar e the same whichever way the pr oduct is labeled. Wiring for remote control Options for remote co
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Controlling multiple amplifiers with one volume controller Several MPA 401 units can be daisy-chained so that one volume controller can simultaneously regulate the volume of all the amplifiers. NOTES: • As additional amplifiers ar e added to the daisy chain, the sensitivity of the volume potentiometer will change. The maximum volume level (fully clockwise) will not be af fected. However the ef fectiveness of the minimum volume level (fully counter clockwise) in r educing the volume to inaud
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Speaker Connections 100V OUTPUT OUTPUT f Speaker receptacle (see figure 2) — Connect the speakers to the speaker receptacle using the 2-pole, 5 mm screw-lock captive screw connector (MPA 401-100V shown at right). 100V CLASS 2 WIRING NOTES: • The mono audio speaker receptacle may be labeled in one of two ways (see the diagrams above). The wiring and function are the same whichever way the product is labeled. • The MPA 401 amplifier sums the left and right signals from both the TRS and RCA
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Setup and Operation This section provides information about the front panel features and operation of the MPA 401-70V and MPA 401-100V: • Front Panel Features • Setting Input Level • Setting Bass and Treble • Remote Control Options • Troubleshooting Front Panel Features The front panels of the MPA 401-70V and MPA 401-100V are identical and shown below: 2 LEVEL BASS TREBLE 1 MPA 401 MINI POWER AMPLIFIER Figure 7. MPA 401-70V or MPA 401-100V Front Panel a Power LED — The LED lights green
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Setting Input Level LEVEL BASS TREBLE Adjust the input level as follows: 1. If necessary, unplug the remote connector from the MPA 401 unit. MINI POWER AMPLIFIER 2. If connecting the amplifier to a system with adjustable volume, set the volume to its lowest point. Then adjust the level potentiometer fully counterclockwise to its minimum setting. 3. Set the system volume to its maximum level. No sound should come out. 4. Slowly increase the amplifier level until sound distortion starts to occu
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Remote Control Options Extron Extron SI 3CT LP a Full-Range VCM 100 AAP Ceiling Speakers Volume/Mute Controller Extron b MLC 104 IP Plus Controller Extron MPA 401 Mini Power Amplier Extron DVS 304 DVI AD Flat Panel Digital Video Display Scaler Audio (DVI) with Audio Laptop VCR DVD DSS Receiver (RGB) (Video) (Component) (S-video) Figure 8. MPA 401 Remote Control Options 1. Extron VCM 100 AAP volume and mute control — For a system designed to control the volume of the amplifier directly, use
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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 Problem Description Problem Solution Color Amber No output signal. • No input detected: verify that there is an input signal. If a signal is present, raise the input level. • The amplifier is in standby mode and the output has been turned off. Check the remote port. • The input signal may be too weak. Rais
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Reference Material This section of the user guide contains information about Mounting the MPA 401. Mounting Plenum Placement The MPA 401-70V and MPA 401-100V amplifiers meet UL 2043 requirements for heat and smoke release. They can be installed in the ceiling, out of sight, with reduced risk of theft. ATTENTION: 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. Cables to and from the amplifier must also
