Radio Shack MPA-125 owner manual Connecting a Turntable

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Notes:

•If your microphone’s cord is longer than 20 feet (6.01 meters), we recommend that you connect it to a balanced jack to reduce signal hum.

•If you connect a microphone to both jacks for MIC 1, MIC 2, MIC 3, or MIC 4, the microphone you connect to the unbalanced jack has priority.

•If you connect a microphone to either MIC 4 jack, set PHONO/MIC 4 on the back of the amplifier to MIC 4.

Connecting a Turntable

Turntable

GND

PHONE/MIC 4

You can connect a low-level audio input source (such as a magnetic cartridge turntable) to the L PHONO and R PHONO jacks on the back of the amplifier.

If you connect a low-level audio input source to the PHONO jacks, set PHONO/MIC 4 on the back of the amplifier to PHONO.

To avoid a low-frequency hum, connect your turntable’s ground wire (usually black or green) to the amplifier’s GND terminal.

6		Connections

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Contents MPA-125 100-Watt PA Amplifier Contents Features Master Volume Control lets you adjustPresetting the Amplifier Presetting the ControlsPresetting Audio Input Devices PreparationConnections Connecting Input SourcesConnecting Microphones Mounting the AmplifierConnecting a Turntable Connecting an Auxiliary Sound Source Connecting the MIX BUS JackConnecting an Equalizer Connecting Speakers Determining Total Speaker ImpedancePreparing the Speaker Wire Connecting Only One SpeakerConnecting Two Speakers In Series Connecting Two Speakers In Parallel Connecting Four Speakers In Series/Parallel CombinationConnecting Speakers with Trans- formers Transformers offer these advantagesUsing Your Amplifier Connecting PowerMonitoring the Sound Sources Safety IndicatorsUsing AN Equalizer Listening SafelyUsing the Feedback Filter Troubleshooting Symptom Possible Cause SuggestionCare and Maintenance Replacing the Fuse FCC Wants YOU to KnowSpecifications Fm Page 19 Tuesday, March 28, 2000 1045 AM Limited One-Year Warranty

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.