Great responses guys! Yeah, I've got quite a variety of 6SN7's (phono grade) and wanted to take advantage of this. If it was lacking a bit on gain, I really didn't care so much as the rest of system's gain capability could pretty well make up for it. 6SL7's are not my "direction" so I guess it's back to the miniatures. Say Ralph, do you think that MFA unit would allow 6SN7 / 6SL7 interchangability? Just how big a gain difference are we talking about between these two tubes? Maybe this whole thing is more effort than its' potential gains are worth.
