How to adjust BIAS on Audio Research D160?


i got a  Audio Research D160 tube amplifier, but it's no tubes.
so i need to buy all the new tubes,  but i don't know how to adjust the tubes bias,
the (12ax7 6922 12at7 12bh7 )tubes need to  adjust the bias? or just the 6550 need to adjust the bias ?
hope someone can help me, thanks!
jc126

Showing 1 response by roberjerman

Only the 6550's need bias adjustment. You will need a voltmeter and screwdriver. And the amp MUST be connected to a pair of speakers before turn on!