@cleeds Thank you so much!!! We are sitting pretty now across all four tubes at 65.
Eva Cassidy is sounding angelic right now.
How to adjust the bias on an Audio Research Ref 75?
I've jumped into the tube world in the last 30 days with purchasing a Ref 6, PH7, and now the Ref75. The sound is just superior to what my AudioControl Maestro M9 powered by a Parasound A31 could ever produce.
Yesterday, I checked the bias reading on the tubes and only one is sitting at the 65 mark. So I pulled off the cover and read the manual but I'm lost. Where is the bias adjustment screw?