Question about Altec Lansing 641 Computer Speakers

2 Answers

Sub Woofer does not work

Any idea how to troubleshoot a sub woofer that produces no sound? Or where it can be repaired? The headphone jack has sound. The Sub Woofer still powers all of the satelite speakers. So there's power there. Altec Lansing no longer supports the Altec Lansing 641 speaker system.

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  • Anonymous Feb 09, 2009

    Altec Lansing speakers show power but produce no sound. Have checked volume setting on computer itself. It is turned up to maximum.

  • Anonymous Mar 16, 2014

    No power

  • Anonymous Mar 17, 2014

    I am missing my control pod for VS3151 and i have sub-woofer and 5 speaker. Is the control pod alone available for a lowest price?

  • Anonymous Mar 23, 2014

    Iv'e made sure all wires are plugged in wellspeaker lights are on but no sound

  • Anonymous Mar 23, 2014

    woofer is not turning on

  • Anonymous Mar 28, 2014

    how to test the power supply? won't turn on

  • Anonymous Mar 28, 2014

    test the power supply



2 Answers

This is a known issue with some of the circuits in the 641 that have a tendency to fail. for more information and possibility for repair see this forum:

Posted on Apr 15, 2008

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Hi there are fast checkings for you: Quick Connect Card manual: is the system working fine exept the sub? my guess: the headphone jack works fine then the speakears are too if soo then the sub amp is bad or some connection is torn try opening the sub and see if everything is hooked right and if soo then the amp is the problem every electronics shop can fix this good luck

Posted on Mar 21, 2006


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5 Answers

Broken connector in subwoofer connection on receiver

The only thing you do is to open your receivers,then locate the output connector if you see the female RCA jack ,then push it out the broken piece ,that's it

Jul 27, 2008 | Audio Players & Recorders

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I have a Fisher RS-909 Surrond Sound amplifier. It has no "sub out" jack. I had the sub-woofer working in the past by wiring it as shown in the manual. The problem is that the system was in...

Alright i had a chance to look over things, this is how you are going to hook up the sub. first we'll be connecting the surround sound unit to the sub woofer.
surround sound unit sub woofer
left front: positive (+) <-----to------------->(+) left speaker level in
negative ( - )<- - -to- - - - - - ->( - ) left speaker level in

right front: positive (+) <-----to------------->(+) right speaker level in
negative ( - )<- - -to- - - - - - >( - ) right speaker level in

now that the surround sound unit is connected to the sub woofer you will need to connect the front surround sound speakers to the sub woofer.
sub woofer front surround sound speaker
left speaker level out (+)<-----to--------> (+) left front speaker
left speaker level out( - ) <- - - to- - - - ->( - ) left front speaker

right speaker level out (+)<-----to--------> (+) right front speaker
right speaker level out( - ) <- - - to- - - ->( - ) right front speaker

Alright now that the wires are all over the place and plugged in
turn everything on and see how it sounds. let me know if everything is working as it should. if you need help with anything else or if something does not seem right please feel free to contact me via e-mail or phone
Mark Woodring

Feb 13, 2011 | Audio Players & Recorders

1 Answer

Some weeks ago the sub stopped working. Thought dog had chewed the coaxial driver cable, but not shorted (now). Tried another sub w/o success.

Hi, I went to the Denon website and they have no documentation there for your receiver.
But do not frown, I have some good suggestions for you.
0 Don't beat the dog. After all, it's their job to chew things.
1 Get a new, un-chewed cable and see what happens between the sub output and the sub woofer. If it works, your in business. If it does not work. Don't be discouraged . Go to step #2
2 If the sub output on the Denon has failed, and everything else is good. There is another way to use your sub.
Install a patch system using the Headphone output from the front of the Denon. It may seem odd, but it works exceptionally well for the following reasons. It works on all signal sources. So if you are not playing a home theater source, you still have the use of your sub.
You will need the following adapters.
1 A Male stereo phone jack to female mini-phone jack. (Something that would accept typical small headphone sets such as those on an iphone).
2 A stereo "Y" connector that that has a single stereo male mini-phone jack that has two "RCA" female jacks.
3 A simple RCA male to male stereo cable pair as is commonly used to connect CD players, etc. i.e. separate red and white RCA connectors at both ends.
1 and 2 above may be available as a single unit combined with each other.
Take these adapters and connect the Item 1 into the Receiver, Item 2 plugged into Item 1, Item 3 plugged into Item 2 and finally the other end of Item 3 plugged into the two female RCA jacks mounted onto the back of the sub-woofer. If the sub only has one female RCA connector, get a RCA "Y" connector that has a single male end to 2 female ends.
This setup will work perfectly with any sub. The reason is as follows. Most decent subs have an adjustable high frequency cut off. So you can vary it from about 20Hz up to about 140 Hz.
I recommend that it is cut off at 80 hz. This way the bass transition is usually seamless between the woofer and the rest of the system. .
Then adjust the woofer volume control in a similar manner.
If it all works out, give the dog a treat and enjoy yourself.
I really hope this helps, I love my sub woofer as well.
Let me know how this turns out.
If you have any questions please post them on the site and I'll get back to you ASAP.
Best Regards,

Jan 22, 2011 | Denon AVR-3600

1 Answer

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You will need an amplifier or 2 channel receiver. Hook the sub out rca jack to the rca inputs on this new amp or receiver and hook the speaker terminals on sub to speaker terminals on same amp or receiver. Your Yamaha receiver doesn't have any power for a passive sub.Just pick up any old fairly high powered receiver for fifty dollars and you're good to go.I use old dolby pro logic receivers as they are a dime a dozen today. Good luck.

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It is based on your sub-woofer type..whether powered or passive sub woofer..
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mail me clearly about the problem,

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