Question about Altec Lansing VS2121 Computer Speakers

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One speaker not working

I turned the volume (on the computer) down to nothing, then increased it again, and only one speaker came back with sound. The other speaker has a hissing sound when you put your ear to it, but no music comes out of it!? Have worked fine for 2 years, so can you please tell me what might be the problem?? I have unplugged and retried to no avail. Hope you can help! I have had a pair of Altec Lansing VS2121 speakers for about 1-2 years and have worked great. Until one day I had turned on my comp and only one speaker was working, weird part is that the none working speaker is the one that has the controls on it (volume, head jack etc.) my problem comes when I attempt to open it up to see what exactly is the problem, there doesn't seem to be a way to open it without breaking it or if its just all glued together. There are no screws that keep the cases closed just a little grill looking thing covering the speakers which have 4 screws but cant get to the volume controller part. If anyone has opened one up or has any suggestions please let me know. Thankyou much.

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  • Anonymous Feb 15, 2009

    i have 4 speakers 2 of them are not working


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I called Altec Lansing Technical Support:

Altec Lansing
535 Route 6 & 209
Milford, Pennsylvania 18337-0277
T. 866-570-5702
T. 570-296-4434
F. 570-296-6887

They stated that the case is not made to be opened (Great Design...NOT!) They suggested I remove the sub-woofer cable and clean the pins with alcohol. Of course, you should remove the AC plug first.

One other suggestion I would make as a last resort, for this and other problems. With the unit unplugged, pull off the Volume Control Knob, and the sfx knobs.  Spray electrical contact cleaner in the openings, and hope it reaches the dirty areas.

Make sure all the cleaner has evaporated before reconnecting the unit.

Good Luck

Posted on Feb 13, 2008

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Jjohnmith

First things first:
1) check your speaker for good connector, and all is working is playing fine.
2) check if your warranty covers one SPK. or RMS
other than that ,
Good Luck

Posted on Feb 01, 2008

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Posted on Jan 02, 2017

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1 Answer

Have Logitech small speakers for computer. They are turned on and the volume is increased, but no sound. Any easy correction ? Thanks.


click start control panel administrive tools computer management device manager scroll to cd/dvd rom drives right click properties then properties again then tick enable cd digital cd audio for this cd rom device or scroll to dvd regions select the no _ for your specific area
you might need to select stereo speakers
click start control panel sounds and audio devices select advanced there might be a tick in the mute box untick it
click start control panel sounds and audio,volume,advanced,speakers make sure you have selected the
(((appropriate speakers))) also audio you will find 3 drop down lists make sure you have the correct settings there also if you have the right ones selected
the speakers plug/outlet is usually at the back of the computer you will have to open up the computer to check the lead attached to the rear of the input plug make sure the connection is good
try cleaning your computer of dust using a fine air blower from a compressor making VERY sure that there is no MOISTURE in the air line specifically around the CPU central processing unit and your sound card dust causes static to build up in a computer causing it to overheat any many other problems
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I bought these x 240 speakers used. do i need a driver to run them? where do i connect the plugs, black and green?


These are "decent" quality 5.1 speakers, new were on about $100.00 to $150.00, have two years warranty from time of purchase.

Now, to your question, you will not have 5.1 "surround sound" effect with standard sound card, standard sound card will provide only three speakers sound, rear speakers will not connect.

Connect speakers as follows:
1. Audio from PC, orange, green and black connecting to front right speaker.
2. DB15 (D-SUB) connecting to subwoofer, subwoofer is serving as mixer, power board, amplifier and connection box
3. White plug is connecting to front left speaker
4. Red is connecting to front centre speaker
5. Black is connecting right rear speaker
6. Yellow is connecting left rar speaker.

Establish location of the speakers, from experience in ideal world:

1. Sub should be on about your knee level or below,
2. Front centre speaker should be about twice your hight distance from you, on front and slightly above your head.
3. Front left and right speakers should be at about 45degree from your axis, at distance of about 1.5 your hight and on the level of your head or slightly below.
4. Rear left and right speakers should be located similiary to front speakers, on they level or slightly above them, again, about 45degree from your axis.

Location of the speakers is more actually important than it is assumed, total sound immersion is not possible without proper speakers installation. Head in these instruction meant a location of your head while you are listening to your music or recording not whil eyou are standing.

In reality... hang them higher than your head in four corners of your room, front centre higher than sides, woofer lower than sides and below front centre, if they interfere with each other - increase the distance. I hate reality...

After speakers are connected:
1. Plug power cord in,
2. Turn all sounds totally down, including subwoofer
3. Increase sound on PC to maximum, let play any known to you music, tufftuff or bach, whatever, do not bother with metallica as you cannot discredit on it correct levels.
4. Increase subwoofer volume, holding one hand on the front of the grill till you get some vibration from it
5. Increase sound on centre button of the right fron speaker till you achieve equality of the sound
6. Decrease sound volume on your PC to about 60% - 70%
7. Increse subwoofer volume till you feel sound on your hand in front of the speaker.
8. Increase sound volume on front/rear speakers as required.

Hope that short intro solved all your speaker problems, enjoy! if you require any additional help, do not hesitate to answer to this post with request.

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Try this;
start button>msconfig>startup tab>disable all (remember which you turned of so you can turn them back on later. Now reboot and then try your media player. If they work fine now, you know you are running out of memory. Either turn on only essential programs, or increase your computers ram (memory)

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A lot brand of speakers, like Sound Blasters, Logitech, Cambridge, has this (strange) kind of volume problem, sometimes, is the resistor, in the volume control, sometimes in the modulator for the board on the sound speakers, Subwofer.
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from other thing, be change the speakers.

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