When I had my 750 MCX monos several years ago (before I went all tubes) I was using an Audio research Ref 2 Mk ll preamp and never used any DC bypass caps. I had no problems whatsoever.
You must have a verified phone number and physical address in order to post in the Audiogon Forums. Please return to Audiogon.com and complete this step. If you have any questions please contact Support.
