This business is the only McIntosh factory-authorized repair facility in the Phoenix area. I brought a McIntosh MX-112 to the shop. Because of it's age, I was ready to give up on this preamp/tuner and use it as a boat anchor. Cornell was not only able to diagnose the problem, he was able to do the repairs in a timely manner and for the same price as quoted. Needless to say, my 44 yr old Mac sounds fantastic.
He not only works on McIntosh equipment. I brought my 40 yr old Phase Linear 700B to him. He was able to diagnose and repair some longstanding problems and perform some upgrades to the caps that had been recommended by serious audiophiles for a while. Again, he was able to perform the work for what he quoted.
Audio Doctor does a lot of repairs for audio/visual businesses all over the valley. He's open by appointment only. He accepts credit cards.