Altec Lansing XA2021 User Manual page 6

Symptom Possible Problem
Sound is Volume level set too high.
distorted.
Computer operating system volume level is set
too high.
Sound source is distorted.
Radio Too close to a radio tower.
interference.
No sound from Subwoofer volume is too low.
subwoofer.
Bad connection.
Low hum from The AC in your house is at 60 cycles per second, which is
subwoofer. within the audio frequency of the subwoofer.
Loud hum from Bad connection.
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
Turn the VOLUME knob counterclockwise to lower the volume.
Adjust the computer operating system volume and balance levels to the
center as a starting point, then adjust the level on the speaker using the
volume control.
WAV files are often of poor quality. So distortion and noise are easily noticed
with high-powered speakers. Try a different sound source such as a music CD.
Move your speakers until the interference goes away.
Turn the SUB LEVEL knob clockwise to raise the subwoofer volume.
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.
Turn the SUB LEVEL knob counterclockwise to lower the subwoofer volume.
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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