Altec Lansing CS21 Mode D'emploi page 6

Symptom Possible Problem
Low hum The AC in your house is at 60 cycles per second, which
from subwoofer. is within the audio frequency of your subwoofer.
Loud hum Bad connection.
from subwoofer.
Volume on your audio source set too high.
Not enough bass Check the volume on audio source.
from subwoofer.
Bad connection.
Bass setting is too low.
Distorted Subwoofer too close to PC monitor or TV set.
picture on
PC monitor or
TV screen.
Solution
Some low hum may be detected when your speaker system is powered on
without an audio source playing, or when the volume is set at an extremely
low level.
Unplug the power cord from the surge protector (if used), and plug directly
into an AC wall outlet.
Check to make sure all cables are connected properly and are making
a clear connection.
Lower the volume or bass level on your PC, portable audio device, etc.
Increase the volume on the audio source.
Check to make sure all cables are connected properly and are making
a clear connection.
Increase bass level on back of subwoofer.
Because the subwoofer is not magnetically shielded, it can cause distortion if
it's too close to your PC monitor or TV set. Move the subwoofer so it's at least
2 feet from the monitor or TV set.
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