Radio Shack MPA-125 owner manual Features, Master Volume Control lets you adjust

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ˆFeatures

Your RadioShack MPA-125 100-Watt PA Amplifier gives you the versatility and power you need in a professional sound system. Its wide frequency response easily handles am- plification of voice and music. Use it in meet- ing halls and auditoriums, at sports events, in schools, and in the office for paging systems

–anywhere you need to deliver special an- nouncements with excellent sound.

Your amplifier includes these features:

100-Watt Output — provides powerful audio output for many types of sound installations.

60–25000 Hz Frequency Response — pro- vides wide-ranging response for true audio reproduction.

Lighted VU Meter — measures the amplifi- er’s output in decibels.

Two Mounting Options — you can mount the amplifier in a standard-sized audio equip- ment rack or on a desk, shelf, or table.

Clipping Indicator — lights when a sound source signal exceeds its mixing control set- ting.

Overload Protection — automatically inter- rupts the amplifier’s power and lights an indi- cator if the amplifier gets too hot due to power overload.

Four Microphone Input Jacks — you can connect up to four balanced or unbalanced microphones to the amplifier.

CD/Auxiliary Input Jack — you can connect a variety of audio input sources for music and special effects.

Phones Jack — you can connect head- phones so you can hear the mixed audio in privacy.

Master Volume Control — lets you adjust

the overall sound level.

EQ IN/OUT Switch — lets you connect and use an equalizer with the amplifier.

Push-Terminal Connectors — let you easi- ly connect wires directly to the amplifier.

Five Individual Source Mixing Controls — let you mix connected sound sources individ- ually or all at the same time.

Feedback Filter — lets you control audio feedback.

Read this manual carefully. It describes vari- ous speaker connections to help you select the best arrangement for your amplifier and connected equipment, and explains how to use the amplifier.

WARNING: To reduce the risk of fire or shock haz-

ard, do not expose this product to rain or moisture.

 

CAUTION

!

 

RISK OF ELECTRIC SHOCK.

 

DO NOT OPEN.

 

CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT REMOVE COVER OR BACK. NO USER-SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED PERSONNEL.

This symbol is intended to alert you to the presence of uninsulated danger- ous voltage within the product’s enclo- sure that might be of sufficient magnitude to constitute a risk of elec- tric shock. Do not open the product’s case.

This symbol is intended to inform you that important operating and mainte- ! nance instructions are included in the

literature accompanying this product.

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Contents MPA-125 100-Watt PA Amplifier Contents Master Volume Control lets you adjust FeaturesPreparation Presetting the ControlsPresetting Audio Input Devices Presetting the AmplifierMounting the Amplifier Connecting Input SourcesConnecting Microphones ConnectionsConnecting a Turntable Connecting an Auxiliary Sound Source Connecting the MIX BUS JackConnecting an Equalizer Determining Total Speaker Impedance Connecting SpeakersPreparing the Speaker Wire Connecting Only One SpeakerConnecting Two Speakers In Series Connecting Four Speakers In Series/Parallel Combination Connecting Two Speakers In ParallelTransformers offer these advantages Connecting Speakers with Trans- formersConnecting Power Using Your AmplifierListening Safely Safety IndicatorsUsing AN Equalizer Monitoring the Sound SourcesUsing the Feedback Filter Symptom Possible Cause Suggestion TroubleshootingCare and Maintenance FCC Wants YOU to Know Replacing the FuseSpecifications 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.
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