switch on/off preamp thump

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6th January 2009, 10:48 AM	#1
ljk11 diyAudio Member Join Date: Feb 2005 Location: Port of Spain	switch on/off preamp thump I recently built a Welborne Labs ultrapath preamp, sounds very good except there is a big thump when powering on/off Its battery powered at only 24v so I am at a lost to any switching noise etc. Any suggestions ?

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