32-2003.fm Page 5 Tuesday, March 28, 2000 10:45 AM

MOUNTING THE AMPLIFIER

You can mount the amplifier in a standard- sized audio equipment rack or on a desk, shelf, or table. Be sure you place it in a loca- tion with adequate ventilation. Do not put it on thick carpeting (which can restrict air flow) or near a heat source such as a heat vent or radiator (which can cause it to overheat).

PLACING THE SPEAKERS

Speaker placement depends on your room’s size and arrangement. We recommend you play a wide-range recording and experiment with speaker placement until you find the lo- cations that result in the best sound. For the best results, point the speakers in toward the listeners, especially if you place speakers far apart so their coverage areas overlap to pre- vent dead spots (areas not covered by the speakers’ sound). Position the speakers slightly above the level of the listeners’ heads (see “Connecting the Speakers” on Page 8).

ˆConnections

CONNECTING INPUT SOURCES

You can connect optional components such as microphones, a tuner, a turntable, or a CD play- er to your amplifier to expand your audio system. To prevent hum and other noise, use low-ca- pacitance shielded cable. Your local RadioShack store carries a wide selection of audio components and cable.

Before you make any connections, be sure POWER on the front of the amplifier is out and the AC power cord is not plugged in.

Connecting Microphones

You can connect up to four high- or low-impedance microphones to the microphone inputs on the back of the amplifier. Each input (labeled MIC 1, MIC 2, MIC 3, and MIC 4) has a balanced and unbalanced jack. You need a microphone cord with a 1/4-inch (6.35-mm) plug to connect to an unbalanced jack or a microphone cord with a 3-pin XLR plug to connect to a balanced jack.

1/4 -Inch Plug

MIC 4

MIC 3

MIC 2

MIC 1

3-Pin XLR Plug MIC 4 MIC 3 MIC 2 MIC 1

Connections

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Radio Shack MPA-125 owner manual Connections, Mounting the Amplifier, Placing the Speakers, Connecting Input Sources
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MPA-125 specifications

The Radio Shack MPA-125 is a versatile and powerful amplifier that was designed to meet the demands of audio enthusiasts and professionals alike. Renowned for its robust performance and reliability, the MPA-125 has garnered a reputation as a dependable choice for a variety of sound applications, from home audio systems to live sound reinforcement.

One of the standout features of the MPA-125 is its impressive power output. With a rating of 125 watts per channel at 8 ohms, this amplifier ensures that audio signals are delivered with clarity and precision, making it suitable for driving a wide range of speakers. The 2-channel design allows for stereo applications, providing a rich and immersive listening experience. Additionally, the MPA-125 can operate at a low impedance, ensuring compatibility with various speaker configurations.

The MPA-125 is equipped with several advanced technologies that enhance its performance. The built-in thermal protection circuit safeguards the amplifier from overheating, allowing it to operate efficiently even during extended use. The amplifier also features a soft clipping circuit, which prevents distortion during peak output levels, ensuring that audio quality remains consistent and clear at high volumes.

User-friendly design is another hallmark of the MPA-125. The front panel includes easy-to-use volume controls, indicator lights, and speaker output terminals. The amplifier is designed for straightforward integration into existing audio setups, making it accessible for users of all experience levels. The balanced XLR inputs provide a secure and noise-free connection, ideal for professional audio applications.

Constructed with high-quality components, the MPA-125 is built to last, ensuring longevity and sustained performance over time. Its compact form factor makes it easy to incorporate into various environments, from home theaters to portable sound systems.

Overall, the Radio Shack MPA-125 is a reliable and powerful amplifier that brings out the best in audio equipment. Its combination of solid performance, user-friendly features, and advanced technologies makes it an excellent choice for anyone looking to elevate their audio experience, whether for casual listening or professional use.
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