RadioShack 32-2055 - Manual

A

©2008.

RadioShack Corporation.

All rights reserved.

RadioShack and RadioShack.com are trademarks used by RadioShack Corporation.

07A08

32-2055 A

Printed in China

32-2055

250-Watt · Stereo

PA Amplifier

Q u i c k S t a r t G u i d e

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 1: Selecting a Location

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

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.

Step 2: Preset the Controls

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.

Step 3: Connecting Your Amplifier

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.

Step 4: Using Your Amplifier

Illuminated
Power Switch

Lights up when
you turn on the
switch.

Left/Right speakers
Volume Control

Turn to regulate volume of
left and right speakers.

FEEDBACK
FILTER

Turn to control
audio feedback.

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.

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

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

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

Use a shield cable with
phono plugs at each end.

Connect an extra
amplifier to MIX
BUS Jack

Use a shield cable
with phono plugs at
each end.

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

MIC 4/
PHONO
Switch

Select

MIC 4

or

PHONO

input.

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 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.