Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems.

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Default Speaker

I have a subwoofer in which there is a strange noise with the speaker
as if the voice coil or the cone of the speaker is touching somewhere
so wat to do to prevent the noise . . .

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wrote in message
ups.com...
I have a subwoofer in which there is a strange noise with the speaker
as if the voice coil or the cone of the speaker is touching somewhere
so wat to do to prevent the noise . . .


Check whether the gluing of the cone periphery or the skirt has failed.
If they are sound
At low power level try pushing the cone in a radial sense in diferent clock
positions and also the same with the skirt/spider.

--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/



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On Wed, 19 Sep 2007 10:48:36 -0000, "
wrote:

I have a subwoofer in which there is a strange noise with the speaker
as if the voice coil or the cone of the speaker is touching somewhere
so wat to do to prevent the noise . . .



Depending upon the quality of your power amplifier and/or the level at
which you have been driving it, your woofer voice coil may have been
overheated and damaged as a result. Only you will know whether this is
the case or not. Use the visual inspection and finger press technique
suggested by NC to ascertain any obvious problem, but my money is on
the voice coil being damaged. In this case the only solution is to
replace the cone/voice coil - provided that one is available for your
speaker. Usually, most respectable brand name speakers will have
spares available.


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Default Speaker

It is possible that the speaker cone or the rubber surround degraded with
age, or it was over driven and the voice coil became warped and it is
rubbing against the magnet.

A common cause of speaker damage is from being over driven. If the amplifier
is under powered to handle the speaker or the loudness demanded, the
clipping effect can damage the coils in speakers.

The fix is to have the speaker re-built, or to replace it.


--

JANA
_____


wrote in message
ups.com...
I have a subwoofer in which there is a strange noise with the speaker
as if the voice coil or the cone of the speaker is touching somewhere
so wat to do to prevent the noise . . .


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Default Speaker

It is possible that the speaker cone or the rubber surround degraded with
age, or it was over driven and the voice coil became warped and it is
rubbing against the magnet.

A common cause of speaker damage is from being over driven. If the amplifier
is under powered to handle the speaker or too much loudness demanded, the
clipping effect can damage the coils in speakers. This is because the
clipping causes some DC signal to reach the speaker.

The fix is to have the speaker re-built, or to replace it.


--

JANA
_____


wrote in message
ups.com...
I have a subwoofer in which there is a strange noise with the speaker
as if the voice coil or the cone of the speaker is touching somewhere
so wat to do to prevent the noise . . .




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Default Speaker

JANA wrote:

A common cause of speaker damage is from being over driven. If the amplifier
is under powered to handle the speaker or the loudness demanded, the
clipping effect can damage the coils in speakers.


Uhho... flame suits on everybody!
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