Radio Shack MPA-125 - Manual (Page 6)

6 Connections
Notes:
• 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 MIC 1 , MIC 2 , MIC 3 , or MIC 4 , the microphone
you connect to the unbalanced jack has priority.
• If you connect a microphone to either MIC 4 jack, set PHONO/MIC 4 on the back of the
amplifier to MIC 4 .
Connecting a Turntable
You can connect a low-level audio input source (such as a magnetic cartridge turntable) to the
L PHONO and R PHONO jacks on the back of the amplifier.
If you connect a low-level audio input source to the PHONO jacks, set PHONO/MIC 4 on the back
of the amplifier to PHONO .
To avoid a low-frequency hum, connect your turntable’s ground wire (usually black or green) to
the amplifier’s
GND terminal.
Turntable
GND
PHONE/MIC 4
32-2003.fm Page 6 Tuesday, March 28, 2000 10:45 AM