Resumen del contenido incluido en la página 1
User Guide
Audio
MPA 152 Plus
®
ENERGY STAR Qualified Stereo Mini Power Amplifier
68-1320-03 Rev. A
11 13
Resumen del contenido incluido en la página 2
Safety Instructions Safety Instructions • English Инструкция по технике безопасности Русский • WARNING: This symbol, , when used on the product, is intended ПРЕДУПРЕЖДЕНИЕ: Данный символ, , если указан D D to alert the user of the presence of uninsulated dangerous voltage на продукте, предупреждает пользователя о наличии within the product’s enclosure that may present a risk of electric неизолированного опасного напряжения внутри корпуса shock. продукта, которое может привести к поражению
Resumen del contenido incluido en la página 3
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
Resumen del contenido incluido en la página 4
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.
Resumen del contenido incluido en la página 5
Contents Introduction............................................................ 1 Important Safety Instructions .............................. 1 About the MPA 152 Plus .................................... 2 MPA 152 Plus Features ...................................... 2 Panels and Cabling .............................................. 4 MPA 152 Plus Rear Panel Features .................... 4 Power Connector ........................................... 4 Audio Inputs .............................
Resumen del contenido incluido en la página 6
MPA 152 Plus • Contents vi
Resumen del contenido incluido en la página 7
Introduction This manual contains information about the Extron MPA 152 Plus mini power amplifier with instructions for experienced installers on how to install, configure, and operate the equipment. Unless otherwise specified, in this manual “amplifier” or “MPA” refer to the MPA 152 Plus. This section provides the following information: • Important Safety Instructions • About the MPA 152 Plus • MPA 152 Plus Features Important Safety Instructions 1. Read these instructions. 2. Keep these instr
Resumen del contenido incluido en la página 8
OUTPUT REMOTE About the MPA 152 Plus The MPA 152 Plus is an ENERGY STAR qualified amplifier with an Extron exclusive, highly efficient, advanced Class D amplifier design. It also features patented CDRS (Class D Ripple Suppression) technology that provides a smooth, clean audio waveform and an improvement in signal fidelity over conventional Class D amplifiers. The high efficiency design generates very little heat and allows the amplifier to be fanless and operated in environments with littl
Resumen del contenido incluido en la página 9
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
Resumen del contenido incluido en la página 10
OUTPUT REMOTE Panels and Cabling This section discusses the MPA 152 Plus rear panel features and cabling. MPA 152 Plus Rear Panel Features The rear panel of the MPA 152 Plus (shown in figure 2 below) allows the user to connect power (see below), audio input (see page 6), remote control (see page 7), and audio output (see page 9). MPA 152 Plus 8Ω / 4Ω CLASS 2 INPUTS WIRING L R POWER 12V 0.7A MAX VC G L L R R 10V 50mA 1 2 3 4 5 6 Figure 2. MPA 152 Plus Rear Panel Features Power Connect
Resumen del contenido incluido en la página 11
PS 1220 Power Supply MPA 152 Plus Ampli er POWER DC Power 12V 0.7A MAX Outputs AC Power Cord Power Receptacle DO NOT USE DC Power Cord Captive Screw Captive Screw Connector Connector Tie Wrap Power Supply Output Cord Figure 3. Power Connector ATTENTION: • Always use a power supply supplied by or specified by Extron. Use of an unauthorized power supply voids all regulatory compliance certification and may cause damage to the supply and the end product. • The amplifier is suitable for
Resumen del contenido incluido en la página 12
LR LR LR LR Audio Inputs Use the rear panel receptacles (see figure 4) to connect audio sources to the amplifier. Wire the connectors as shown below. INPUTS R L L R 2 3 4 Figure 4. Audio Inputs Tip (+) RCA unbalanced stereo input connectors — These b receptacles accept unbalanced, line level audio signals. The input can be stereo, using two RCA connectors, or mono, using a single RCA connector plugged into the left receptacle. Sleeve ( ) RCA Connector If unused, the receptacles automatica
Resumen del contenido incluido en la página 13
REMOTE REMOTE Remote Control Remote input connector — This 3‑pin, captive screw port allows e an audio controller to control volume and mute levels remotely. See Remote Control Options on page 11 if using a MediaLink controller. VC G 10V50mA Wiring for remote control Options for remote control include the Extron VC 50, VCM 100 AAP, VCM 100 MAAP, VCM 200 series, and MLA VC10 Plus. Third party 10k potentiometer volume controllers can also be connected to this port. Figure 5 and the instructio
Resumen del contenido incluido en la página 14
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 Plus unit only: • Ground ( ) to ground (G) • Vol/Mute to C • 10 V to V. 2. Use jumper wires to connect the C (Volume and 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. VOL/MUTE Extron 10V V
Resumen del contenido incluido en la página 15
OUTPUT Audio Output Speaker receptacle — This 4‑pole, 5 mm screw lock f captive screw receptacle is used to connect the amplifier 8Ω / 4Ω to the speakers. CLASS 2 WIRING With an 8 ohm load, the amplifier produces up to 8 watts R L per channel. With a 4 ohm load, the amplifier produces up to 15 watts per channel. See the attention (page 5) and note (page 5) for important information about connecting wires to captive screw connectors. ATTENTION: Do not short the + and – outputs to each other
Resumen del contenido incluido en la página 16
Setup and Operation This section discusses: • Front Panel Features and Operation • Remote Control Options • Defeating the Auto Power-down Timer • Troubleshooting Front Panel Features and Operation This section describes how configure the MPA 152 Plus, using the front panel controls and how to set up the remote control options. LEVEL BASS TREBLE STEREO 1 DUAL MONO MPA 152 Plus MINI POWER AMPLIFIER 2 3 Figure 8. MPA 152 Plus Front Panel Power LED — The LED lights green when the MPA 152 Plus uni
Resumen del contenido incluido en la página 17
OUTPUT REMOTE Setting Bass and Treble Adjust the MPA 152 Plus 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. When the potentiomet
Resumen del contenido incluido en la página 18
OUTPUT REMOTE Defeating the Auto Power-down Timer The auto power‑down timer determines whether or not the amplifier enters standby mode. The amplifier powers down if the input signal remains below the input signal detection threshold for about 25 minutes. The timer resets whenever the input signal exceeds the input signal detection threshold. Resetting the timer starts a new 25 minute countdown until the amplifier powers down. Resetting the timer also causes an amplifier that is already powe
Resumen del contenido incluido en la página 19
Stereo to Dual Mono Level Potentiometer Toggle Switch Resistor R42 Figure 10. Front View, Showing the Location of Resistor R42 4. Identify resistor R42 at the front of the bottom circuit board between the Stereo to Dual Mono toggle switch (to the left) and the Level potentiometer (to the right). The resistor is shown in the white box in figure 10. 5. Remove the resistor using a pair of diagonal cutters to clip the wires attaching it to the circuit board. 6. Re‑attach the top enclosure with th
Resumen del contenido incluido en la página 20
Mounting This section provides information about the mounting options for the MPA 152 Plus. 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. Therefore, install the
