I have used Sheldon twice in the last two years and have been greatly impressed with his expertise, thoroughess, attention to detail, and successful repairs. He is very approachable, easy to talk to, and he uses simple language to explain the problems and solutions so you are never in the dark as to what has happened to your equipment. Last year he serviced my Yam CA-2010 and installed LED lights over the power meters, and just recently he serviced my Yam CA-1000. Both units are running as new and certainly worth the funds expended to bring them back up to specs. These amps will very likely now outlive me - thanks, Sheldon! One note: unless you have a real emergency where you absolutely must have your equipment back ASAP, be prepared to exercise some patience while Sheldon completes the work. read more