Altec Lansing VS4221 User's Guide download pdf (Page 5)

Crackling sound

from speakers.

Sound is

distorted.

Radio

interference.

No sound

from subwoofer.

Low hum

from subwoofer.

Loud hum

from subwoofer.

Distorted monitor.

Bad connection.

Volume level in computer operating system is set

too high.

A problem with your audio source device.

Volume level set too high.

Computer operating system volume level is set

too high.

Sound source is distorted.

Too close to a radio tower.

Bad connection.

Sound source has little low-frequency content.

The AC in your house is at 60 cycles per second, which is

within the audio frequency of the subwoofer.

Bad connection.

Bass level set too high.

Volume or bass level on your audio source device is set

too high.

Subwoofer too close to monitor.

Check all cables. Make sure they are connected to “line-out” or “audio-out”

jack on your sound card or other audio source — NOT “speaker-out.”

Check the computer operating system volume level and decrease it if necessary.

Unplug the stereo cable from the audio source. Then plug it into the

headphone jack of an alternate audio source (e.g., Walkman, Discman or

FM radio).

Press the “–” button on the side of the right satellite to decrease 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.

Check to make sure that all cables are connected properly and are making a

clear connection.

Many .WAV and .MID files often have little low-frequency content and sound

flat when you listen to them on a computer. Try a song with more bass —

something from your CD collection.

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.

Press the “–” button marked with the word “bass” on the wireless remote to

decrease the bass.

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 volume or bass level on your computer, portable device, etc.

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.

Symptom Possible Problem Solution

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Altec Lansing VS4221 User's Guide Page 5

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