Dennis has done several audio projects for me and has shown himself to be a knowledgeable individual with technologies of a multitude of equipment types and ages. Initially I came to him with a Phase Linear amp and pre-amp from the mid 70’s. Another technician had worked on them and couldn’t fix them, but told me the “parts were all in there.” Dennis received this mess of defunct parts – the other technician gave me back the parts he destroyed. Dennis found some very difficult to find replacement parts and fixed the Phase Linear for me. He then went on to fix my Marantz pre-amp and also my McIntosh pre-amp. Every repair done with expertise and handled with professionalism. Not only does he know his stuff, but he’s just a really cool guy to work with.