Bias the tubes @ 238mV the LED's just show that the tubes are ok. 1 or 2 degrees of a turn on the adjustments can make a hell of a difference. I have a meter that you can have if you need. I had a V12R and when you bias them right they are a hell of an amp. Best of luck. If you need a tech at Cary, they are there from 1-4 est.
Cary V12r with balance unequal when in bias
My Cary V12, when biased with the leds, has an imbalance of output volume. I tried switching input cables, eliminating the preamp and using different input sources, no vinyl. I also swapped tubes from left to right, including the input and current tubes at different times. Everytime the left channel is louder. When I turn down the bias until the balance is equal, all of the left channel leds go unlit. What could be the issue? Thanks all for your input ahead of time.