From reading the owners manual it sounds like I should be able to get a mellow overdrive starting with the drive control around 12 o'clock. My preamp doesn't have any overdrive at all until you turn it all the way up and then it is really muddy and sounds like @#$@! I do get a nice clean sound with the drive set at about 2 o'clock and the blend centered and then I still use my boss odb3 pedal for distortion. Is that how others preamp works too? Also, whats the bias setting supposed to be for the el84's. Mine was biased really cold when i got it. Does someone have schematics for this thing? If so, could you e-mail them to me? Thanks.