Re: woofer cone moves... very wierd.

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Article #319

#319

From: John Woodgate
Date: Wed, 23 Dec 1998 00:00

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In a most apposite and timely  article <36805B90.BF89640A@unico.com.au>,
Ben Thomas <ben@unico.com.au> contributes to the sum of human endeavour
>If I select the aux input on my old Sansui amp, and turn the
>volume up, I can see the woofer cone of my Warfedale
>bookshelf speaker on the left channel move outwards, opposite when 
>turning down the volume.  if I switch to any other input source, the 
>phenomena (sp?) does not occur.
>
>What could cause this?

DC offset propagating through the amplifier from the inpout stage. There
may be a failing capacitor somewhere in the chain. If the movement is
more than very little, you had better get it fixed as it could get
catastrophically worse and damage your loudspeaker.
-- 
Regards, John Woodgate, Phone +44 (0)1268 747839 Fax +44 (0)1268 777124. 
OOO - Own Opinions Only. You can fool all of the people some of the time, but 
you can't please some of the people any of the time.

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From: John Woodgate <jmw@jmwa.demon.co.uk>
Subject: Re: woofer cone moves... very wierd.
Date: 1998/12/23
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