The D-76 and D-90b are terrific amplifiers. I have owned both and liked them equally well. However, it is important they are operating properly and the tubes are sorted and matched for these amplifiers. Audio Research is your best bet for tubes even though they are somewhat expensive. Without proper adjustments and properly selected tubes you will never know the full potential of these amplifiers. I guess if I had to choose between the two I would choose the later amplifier.
help with audio resesrch d76
Hi I just picked up a couple arc amps a d76 and a 90b both in mint condition. What one is the better of the 2 and what do they sell for. I'm getting rid of one or the other. Gary