The bias issue seems to be with the meter. I have used it very little and attempted to refer to the manual for it. I have the tubes dialed in to .499 to .502. It will take some breaking in and the bias will be checked often. I did as a member suggested. I have a 12BH7 in the middle and 12AU7 tubes outboard. I am uncertain of the reason but it does sound good. I am now wanting to rebuild the crossovers in my original Grafyx SP10 speakers. What I really need is a good room to have the stereo set up in. I should have that in a year or so.