I had four Acoustat TNT amps rebuilt and modded by Roy Esposito in Florida recently. He was a principal engineer in that company and instrumental in the amp's design. He now runs a shop dedicated to preserving the Acoustat line. He added balanced inputs and mono capability along with the full rebuild/upgrade. The amps are very impressive. I've had them for about a year now and they just seem to get better and better. They never cease to surprise me. I cannot find fault with them. They have everything in spades. However, he is not cheap. Cost of each amp was about 500 and the work about 900 each. To use his words, "This amp will run circles around amps costing ten to fifteen thousand". He wasn't lying. Imo, he was being conservative. I believe he's willing to take on other brands as well.
In Toronto there's a guy who used to work at Brack's, a high end audio shop, who now runs his own show. Very highly sought after. His name eludes me but I could round it up.
