Roberts Radio 32-2054 User Manual

www.radioshack.com

OWNER’S MANUAL — Please read before using this equipment.

32-2054

Thank you for purchasing the RadioShack 40W AC/DC PA Amplifier. It gives you the versatility and power you need in a professional sound system. Your amplifier’ s wide frequency response easily handles ampli ficat io n of voi ce and musi c. Use it in meeting halls and audit oriums, at sports events, in schools, and in the office for paging syst ems - anywhere you need to deliver spec ial announcements with excellent sound.

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RadioShack Corporation.

Front View of Amplifier

Phono/Aux Rotary Volume Control - lets you adjust the volume of the turntable or auxiliary sound source (See Page 15).

On/Off Rocker Switch with LED Indicator - lights to indicate power is turned on (See Page 15).

Output Power Level LED Indicator - lets you monitor and

control the output power level (See Page 15).

Microphone Rotary Volume Controls - lets you adjust the

microphone level (see Page 15).

MIC 1 and MIC 2 Input Jacks

- let you connect up to two

dynamic microphones (See Page 6).

Phones Jack - lets you connect headphones so you can hear the mixed audio in privacy (See Page 16).

Rotary MASTER Volume Control - lets you adjust the overall sound level (See Page 15

100 Hz/1kHz/8kHz Tone Controls - let you

enhance the sound or tailor the high, midrange, and low frequencies for each audio source input to the acoustics of a particular performance environment (See Page 15).

Rear View of Amplifier

COM/4

Ω/8Ω/16Ω/70V Speaker

Connectors - let you easily connect speaker wires directly to the amplifier after the total speaker impedance is determined (See Page 9).

DC 5A/12V Input Jack - lets you power the amplifier from a 12V vehicle battery source

(See Page 15).

Ground Screw - connect the

ground wire (black or green) to this screw to avoid low-frequency hum.

AC IN - supports other music instrument/amplifier power with maximum load of 100W (See

Page 14).

Phono to AUX/CD Slide Switch - selects turntable

or auxiliary CD sound source (See Page 6).

Phono Jacks - let you connect a turntable (See

Page 6).

Mix Bus Jack - connects extra amplifier for multiple audio source

(See Page 7).

AUX/CD Input Jack - lets you

connect a variety of audio input sources for music and special effects (See Page 6).

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Preparation ............................ 4

Placing the Amplifier .......... 4

Placing the Speakers ......... 4

Presetting the Controls ...... 4

Preparation

Connections .......................... 5

Connecting Input Sources... 5

Connecting the Speakers.....7

One Speaker...................9

Two Speakers in Series..9 Two Speakers in

Parallel ..........................10

Series/Paral le l Comb. ...11

Speakers w/Transform. .12

Connecting Power ............... 15

Connecting the DC Jack ....15

Replacing the DC

Power Cord’s Fuse ............15

Operation ............................. 15

Monitoring Sound.............. 15

Listening Safely ................ 15

Troubleshooting ................... 16

Care ..................................... 17

Service and Repair .............. 17

Specifications ...................... 18

Accessories...........................19

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Before you use your amplif ier, be sure to place it o n a location with adeq uate ventil ation. Do not put it on thick carpeting (whic h can restrict a ir flow) o r ne ar a heat source, such as a heat vent or radiator (which can cause it to overheat).

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Speaker placement depends on your room’s size and arrangement. We recommend you play a wide-range recording and experiment with speaker placement until you find the locations that result in the best sound. For the best results, point the speakers in toward the listeners, especially if you place the speakers far apart so their coverage areas overlap to prevent dead spots (areas not covered by the speaker’s sound). Position the speakers slightly above the level of the listeners’ heads and be sure y ou have det ermined th e correct speaker impedance (see “Connecting the Speakers” on Page 7).

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Before you begin maki ng conn ection s or usin g your amplifier, preset the audio input sou rces’ and amplifier’s control s to avoid overdriving a channel o r producing loud sounds .

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Set the audio input s ources ’ control s to th ese l evels.

Audio Device Control Setting

Turntable Power Off

Tape Deck Power Off

CD Player P ower Off

Amplifier Receiver

Power

Tone

Off

Flat

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Warning: To prevent possible hearing loss, set the amplifier’s controls to the settings shown below.

Control Setting

Power Out

MIC 1, MIC 2, PHONO/AUX MIN

100 Hz, 1 kHz, 8 kHz 0dB (mid position)

MASTER VOLUME MIN

After you turn on the amplifier or change the program source, set the controls to a comforta ble listening level.

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You can connect optional components, such as microphones, tuners, turntables, or CD players to your amplifier to expand your system. To prevent hum and other noise , use lo w-ca pacita nce shie lde d cable. Your local RadioShack store carries a wide selection of audio components and connecting cable.

Connections

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You can connect one dynamic microphone (not supplied) to MIC 1 and another to MIC 2 using a 1/4” (6.35 mm) plug.

Connections

MIC 1

MIC 2

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You can connect a low level audio input source, such as a magnetic cartridge turntable, to the amplifier’s L and R PHONO jacks. With this connection, set the PHONO and AUX/CD selector switch to PHONO.

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You can connect an y high -level sound source , su ch as a CD player, tape deck, or tuner, to the amplifier’s AUX/CD jack.

AUX/CD Jack

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