Question about Altec Lansing VS4121 Speaker

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Subwoofer sound cutting out.

Have these speakers was fine at first then it got a rattling sound in it and now the subwoofer comes in and out. Not sure what the problem is thought I might have blown the speaker in the subwoofer but that shouldn't make the sound come in and out like that should it.

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Hiya by rattling i am assuming like something loose/fell off etc (rattling sound or distortion on the speaker itself is different, speaker could be damaged or braiding damaged that 'Might" make the speaker come in and out.) Something could have come of the PC board and may not be to serious. Probably protecting as not 100%. It may be as simple as resoldering the part but if not sure on your side i would advise seeking some help. Best of luck

Posted on Jul 13, 2009

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Posted on Jan 02, 2017

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1 Answer

It keeps turning off eventhough the back switch is turned on


You need to determine if its a malfunction of the sub or just due to a loss of input. And is it always in response to, say, over-enthusiastic use?

From the manual...

TROUBLESHOOTING

If you used the high-level (speaker) inputs and there is no sound from any of the

speakers:

• Check that receiver/amplifier is on and a source is playing.

• Check that powered subwoofer is plugged into an active electrical outlet and is switched on.

• Check all wires and connections between receiver/amplifier and speakers. Make sure all wires

are connected. Make sure none of the speaker wires are frayed, cut or punctured.

• Review proper operation of your receiver/amplifier.

If there is low (or no) bass output:

• Make sure the connections to the left and right "Speaker Inputs" have the correct polarity (+ and -).

• Make sure that the subwoofer is plugged into an active electrical outlet and switched on.

• Adjust the crossover point.

• Flip the Phase Control switch to the opposite position.

• If you are using a Dolby Digital/DTS receiver or processor, make sure that the

subwoofer adjustments on the receiver/processor are set up correctly.

• Slowly turn the Level Control clockwise until you begin to hear the desired amount of bass.

If you used the line-level inputs and there is no sound from the subwoofer:

• Check that receiver/amplifier is on and a source is playing.

• Check that powered subwoofer is plugged into an active electrical outlet and is switched on.

• Check all wires and connections between receiver/amplifier and subwoofer.

Make sure all wires are connected. Make sure none of the wires are frayed, cut or punctured.

• Review proper operation of your receiver/amplifier.

• Slowly turn the Level Control clockwise until you begin to hear the desired amount of bass.

• Make sure that you have configured your receiver/processor so that the subwoofer/LFE output is on.

Mar 06, 2011 | JBL PB12 Subwoofer

1 Answer

It comes on but no base sound and wont turn up


You have to fill in the details about what you're feeding it (the source and how IT's set up). It won't just >>create<< bass.

From the manual:

If you used the high-level (speaker) inputs and there
is no sound from any of the speakers:
• Check that receiver/amplifier is on and a source is playing.
• Check that powered subwoofer is plugged into an active electrical outlet and is switched on.
• Check all wires and connections between
receiver/amplifier and speakers. Make sure all wires
are connected. Make sure none of the speaker wires are
frayed, cut or punctured.
• Review proper operation of your receiver/amplifier.

If there is low (or no) bass output:
• Make sure the connections to the left and right “Speaker
Inputs” have the correct polarity (+ and –).
• Make sure that the subwoofer is plugged into an active electrical outlet and switched on.
• Adjust the crossover point.
• Flip the Phase Control switch to the opposite position.
• If you are using a Dolby Digital/DTS receiver or processor, make sure that the subwoofer adjustments on the receiver/processor are set up correctly.
• Slowly turn the Level Control clockwise until you begin to hear the desired amount of bass.

If you used the line-level inputs and there is no sound
from the subwoofer:
• Check that receiver/amplifier is on and a source is playing.
• Check that powered subwoofer is plugged into an active electrical outlet and is switched on.
• Check all wires and connections between receiver/amplifier and subwoofer. Make sure all wires are connected. Make sure none
of the wires are frayed, cut or punctured.
• Review proper operation of your receiver/amplifier.
• Slowly turn the Level Control clockwise until you begin to hear the desired amount of bass.
• Make sure that you have configured your receiver/processor so that the subwoofer/LFE output is on.

Apr 07, 2010 | JBL PB12 Subwoofer

1 Answer

Subwoofer rattling.


Make sure your sub is securely screwed to your box, boot build, whatever you have it sitting in. Remember subs are made to vibrate when working, check your screws are tight.

Sep 07, 2009 | Car Audio & Video

1 Answer

Rattling sound with any significant base output


You either ripped your voice coil, or you have something jumping around inside (Screw, nail, etc.). You can tell of a blown speaker by pressing straight in, and if you hear a rubbing noise, then your speaker has disconnected from your voice coil. Mickey mouse jobs include Krazy Glue, but It's touch and go

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No sound coming from ACS 48 Altec Lansing speakers


Hi janros123 - I don't know if this will help - I have a subwoofer ACS48 that needs satellite speakers (they are blown). Want to buy my subwoofer or sell your satellites? I will buy your broken subwoofer, too...thanks, and good luck! Greg illdooyoo at gmail dot com

May 16, 2009 | Audio Players & Recorders

1 Answer

Rattle Problem w/ subwoofer


When you put the new foam, maybe the cone went off center. Get a new kit, and re-do the job with more care. Check to make sure that the spider is okay, and that the speaker coil is not warped or anything like that.

There are speaker companies the professionaly rebuild speakers. They are better equiped and have the jiggs and facilities to properly rebuild the speaker from the coil up.

If you really want your speakers, you should consider giving the complete set out for rebuilding and testing.

Jerry G.

Apr 27, 2008 | Audio Players & Recorders

1 Answer

JVC Subwoofer problem.


You may have a break in the wire. You can find out by slowing moving your fingers down the wire until you notice sound coming from the subwoofer. You can fix it yourself by cutting about an inch away from the break both ways. Then cuttings some of the wire off, so the copperwire is exposed. then wrap the two copperwire ends together and seal it with elections tape. or Try replacing the 60 watt subwoofer wire.

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2 Answers

Microsoft Digital Sound System 80 - Parts


Same here!

Silicon seal fixed for a while ... ripped again 3 months later.


Apr 05, 2008 | Audio Players & Recorders

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