dlb Posted April 4, 2002 Share Posted April 4, 2002 I have one of these and it is now my backup amp for my Shiva. I wanted to get rid of it by I came to terms that I like it too much. Myles has given me a few pointers on tube changes and bias check. To his advise I have ordered a JAN 5751 for the V1 position and a matched set of Svetlana 6L6GC valves. It is full of Sovtek 12ax7wa's excluding the reverb tube. I sure this amp is a production model. I have fooled with positioning a 12at7 in V1,V2,V3 with off the scale tonal changes but that is about it. Anybody got info on positive changes done on a Prosonic? Link to comment Share on other sites More sharing options...
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