Altec Lansing VS3251 User Manual page 7

Symptom Possible Problem
No sound Subwoofer volume is too low.
from subwoofer.
Bad connection.
Low hum The AC in your house is at 60 cycles per second, which is
from subwoofer. within the audio frequency of the subwoofer.
Loud hum Bad connection.
from subwoofer.
Volume on your audio source device is set too high.
Too much bass Subwoofer volume is too high.
from subwoofer.
Distorted monitor. Subwoofer too close to monitor.
Solution
Increase the subwoofer volume on the wireless remote.
Check to make sure that all cables are connected properly and are making a
clear connection.
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 AC power cord from the surge protector (if used), and plug directly
into an AC wall outlet.
Move your cables. Check to ensure they are making a clear connection.
Disconnect your 3.5mm stereo cable from the audio source. If the loud hum
goes away, lower the volume on the audio source.
Lower the master volume or subwoofer volume on your computer, portable
device, etc.
Decrease the subwoofer volume on the wireless remote.
Because the subwoofer is not magnetically shielded, it can cause distortion if
it's too close to your monitor. Move the subwoofer so it's at least 2 feet from
your monitor.
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