Quad 909 – calling all enthusiasts

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The thread starts:  So, I gave in to audiophilia nervosa and believed the fantastic reports from Dada on how much better the 909 would be without the ampbus card. So I removed it and ended up with a 2 x 140 W buzzing amp. The buzz is regardless of level and input. It was much more quieter without input cables and dead quiet with shorted inputs. So I thought I'd put the ampbus card back and problem fixed. Now I have a 2 x 140 W amp buzzing regardless...  Anyone have any pointer to solving this earthing problem? I have seen some articles on the net about buzzing 909s and earth but haven't figured out what to do...

http://www.pinkfishmedia.net/forum/showthread.php?t=161401

 

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