Radio Shack MPA-50 owner manual ˆMaking Connections

32-2002.fm Page 5 Friday, February 11, 2000 11:36 AM

ˆMaking Connections

Important: Connect all auxiliary equipment and speakers before connecting power.

PHONO L (Left) and R (Right) Input Jacks — Connect a turntable with a magnetic cartridge. To avoid distortion, do not connect a high-level audio input source to these jacks. Even though the amplifier has L and R input jacks, the output from the amplifier is monaural.

AUX/CD L and R Input Jacks — Con- nect any high-level sound source (such as a tape deck, CD player, receiver, or a turntable with a ceramic or crystal car- tridge). To connect a stereo source, use shielded audio cable (available at your local RadioShack store); however, the amplifier’s output is monaural.

GROUND Screw — Connect the ground wire (usually black or green) from your turntable to this screw to avoid a low-frequency hum. You can also use this screw to ground any other system connection.

PHONO/AUX/CD Switch — Select the input source. Even if you connected auxiliary equipment to both the PHONO and AUX/CD input jacks, you can use only one source at a time.

Speaker Push Terminals — Press the appropriate tab to open a terminal. In- sert the end of a speaker wire into the opening, then release the tab to close the terminal and secure the wire (see “Connecting Speakers” on Page 7).

PRIORITY Terminals — To allow MI- CROPHONE 1 to override all other inputs, connect an SPST (single-pole, single- throw) switch to the amplifier’s PRIORITY terminals using normal two-conductor wire (switches and wire are available at your local RadioShack store). Refer to the switch’s manual for connection and usage instructions.

AC Power Cord — To use AC power, plug this cord into an AC outlet.

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