Hi! I got this many months ago from Birgir at Mjolnir Audio. He went through and did a full repair of the amp and also did some mods to the board. To quote him; "I did modernize the bias supply and some small tweaks here and there but nothing major." The XLR inputs on the back and everything...

SOLD. Selling a Stax SRM-1 that needs repair. I bought this last summer, and shortly after buying it one of the channels developed a problem. From what I can tell, two of the resistor banks are very hot. Maybe a dead transistor or trimpot. Both those are original to 1979 so who knows what...