I had purchased a JVM-410H and it started acting up. I didn’t know who to bring it to in the area but a good friend suggested Dennis. I brought in the amp and right away Dennis put me at ease that he’d be able to figure out the problem and that it likely wasn’t the end of the amp. Knowing I needed it for a gig, Dennis got on it right away for me. He fixed the problem as well as re-biased the amp and it sounds the best it ever did. Dennis’ workmanship is equaled only by his customer service. Excellent experience and I will bring all my gear to him going forward and will recommend him highly to everyone. Thanks, Dennis!!