Stanton RM.404 - Manual (Page 21)

Troubleshooting
Sound is distorted
Phono Input
Only plug turntables into this input, do not plug in CD
players or other Line Level sources. Turn down the
INPUT GAIN CONTROL
I hear hum.
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.
I hear
feedback
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 too close to the speakers. Also, make sure the
turntable base is placed on a surface that does not
vibrate or resonate easily when the speakers are turned
up loudly.
Problem / Symptom Possible Cause/ Solution