Radio Shack MPA-50 User Manual

Owner’s Manual
Please read before using this equipment.
MPA-50 40-Watt PA Amplifier
32-2002.fm Page 1 Friday, February 11, 2000 11:36 AM

Radio Shack MPA-50 Specifications

General

Output Impedance	4-8 ohms
Power Output	50 watts
Frequency Response	20Hz - 20kHz
Inputs	RCA stereo
Outputs	Speaker binding posts
Power Output per channel	25 watts

Summary

Making Connections

Input Connections

Details on connecting turntables, CD players, and other audio sources to the amplifier.

Output and System Connections

Information on speaker terminals, grounding, priority switches, and power connection.

Speaker Phasing and Impedance

Speaker Phasing

Explains the importance of correct speaker cone movement and how to determine polarity.

Determining Speaker Impedance

Guidance on calculating total speaker impedance to avoid amplifier damage.

Speaker Connection Methods

General Connection Guidelines

Speaker Connection Types

Single and Parallel Speaker Wiring

Advanced Speaker Configurations

Parallel and Combined Wiring

Transformer Speaker Wiring

Using Transformers with Speakers

Controls and Operation

Front Panel Controls Explained

Troubleshooting

Specifications