Radio Shack 32-2055 User Manual

250-Watt · Stereo

PA Ampliﬁer

32-2055

Quick Start Guide

Step 1: Selecting a Location

Before you use your ampliﬁer, be sure to place it on a surface 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.

Step 2: Preset the Controls

Connect up to 4 microphones with 3 pin XLR plug to Balanced Microphone Inputs.

Connect low-level audio input source (e.g. Turntable) to Phono Input Jacks

If you connect a low-level audio input source to the PHONO jacks, set MIC4/PHONO to PHONO. To avoid a low-level hum, connect your turntable’s ground wire (usually black or green) to the GND

terminal on the ampliﬁer.

Connect up to 4 microphones with ¼” (6.35mm) plug to Unbalanced Microphone Inputs.

MIC 4/ PHONO Switch

Select MIC 4 or PHONO input.

Step 3: Connecting Your Ampliﬁer

Connect stereo input sources (CD or DVD player, TV, etc.) with ¼” (balanced) audio cable to Stereo Input Jacks.

Connect an extra ampliﬁer to MIX BUS Jack

Use a shield cable with phono plugs at each end.

Connect an equalizer or other external processor to EQ IN/OUT Jacks.

You can also connect a tape deck to the EQ OUT jack for

recording.

Connect an auxiliary sound source (CD, tape deck or tuner) to Audio Input Jacks.

Use a shield cable with phono plugs at each end.

1. Connect your input source.

You can connect optional components, such as microphones, tuner, turntable, audio mixer, preampliﬁer, or CD player to your ampliﬁer to expand your system. To prevent hum and other noise, use low-capacitance shielded cable (not supplied, available at your local

RadioShack store or at www.radioshack.com).

Note: This ampliﬁer is equipped with both stereo phono

input and ¼-inch (6.35 mm) jacks. The ¼-inch input jacks on the top are stereo while the others are left and right mono.

2. Connect your speakers.

Connect your speaker wire to the speaker terminals matching their polarities, the positive (+) speaker wire to the positive terminal (red) and the negative (–) speaker wire to the negative speaker terminal (black).

To bridge the ampliﬁer’s channels:

• Speakers connected to the same channel (A or B) are part of a pair and must be of the same impedance.

• Speakers connected to different channels (A or B) are not part of a pair and can be different impedance.

3. Connect Power

Plug the power cord into a standard AC outlet.

Preset the Audio Input Source

Audio Device Control Setting

Turntable Power Flat

Tape Deck Power Flat

CD Player Power Flat

Ampliﬁer Power Flat

Receiver Tone Off

Illuminated Power Switch

Lights up when you turn on the switch.

Presetting the Ampliﬁer

Before you make any connections, be sure the ampliﬁer is turned off and AC power cord is not plugged in.

Mic, CD/AUX, and LEFT / RIGHT volume controls should be set to minimum.

MIC 1, MIC 2, and MIC 3, MIC 4/PHONO and CD/AUX

Adjust volume for the connected microphones, turntable, CD or auxiliary sound source.

Step 4: Using Your Ampliﬁer

FEEDBACK FILTER

Turn to control audio feedback.

Left/Right speakers Volume Control

Turn to regulate volume of left and right speakers.

1. Start the input sound source.

2. Make sure LEFT and RIGHT volume control on the the ampliﬁer are set to MIN.

3. Press POWER to turn on the ampliﬁer.

4. Rotate LEFT and RIGHT volume controls to their middle positions.

5. One at a time, adjust MIC1, MIC2, MIC3, MIC4/ PHONO, and CD/AUX to the desired volume and balance.

If you hear feedback after you adjust these controls, turn FEEDBACK FILTER clockwise until the noise disappears.

6. Adjust LEFT and RIGHT volume controls to the desired volume level after you ﬁnd your desired balance.

07A08

32-2055 A

Printed in China