Stanton RM-406 Owner's Manual page 20

Problem / Symptom
Sound is distorted
Phono Input
I hear hum.
I hear
feedback
Troubleshooting
Only plug turntables into this input, do not plug in CD
players or other Line Level sources. Turn down the
INPUT GAIN CONTROL. Check the EQ settings.
Make sure you are using good shielded audio cables.
Some less expensive audio cables can be susceptible to
hum and interference. Keep your audio cables away
from AC power cables and AC transformers. Make sure
the mixer is not mounted too close to high power ampli-
fiers or lighting equipment power supplies or ballasts.
Make sure your turntables are properly grounded to the
back of the mixer if they include a grounding wire.
If you are using a microphone, make sure that you are
not too close to the speakers or headphones. If you hear
feedback on the phono input, then the turntable may be
mounted to close to the speakers and/or subwoofer.
Also, make sure the turntable base is placed on a sur-
face that does not vibrate or resonate easily when the
speakers are turned up loudly.
Possible Cause/ Solution