Radio Shack MPA-125 用户手册

6

Connections

• If your microphone’s cord is longer than 20 feet (6.01 meters), we recommend that you

connect it to a balanced jack to reduce signal hum.

• If you connect a microphone to both jacks for 

, 

, 

, or 

, the microphone

you connect to the unbalanced jack has priority.

• If you connect a microphone to either 

 jack, set 

 on the back of the

amplifier to 

.

You can connect a low-level audio input source (such as a magnetic cartridge turntable) to the

 and 

 jacks on the back of the amplifier.

If you connect a low-level audio input source to the 

 jacks, set 

 on the back

of the amplifier to 

.

To avoid a low-frequency hum, connect your turntable’s ground wire (usually black or green) to
the amplifier’s 

 terminal.

32-2003.fm  Page 6  Tuesday, March 28, 2000  10:45 AM