Heavily impressed by the amp, but the sound quality and how quiet it is literally threw me in delirium! After 2 and a half hours of work it did not heat up, and it was just placed at the table and below a shelf, the heat of the amp was insignificant. Great for Hi-Fi and studio monitoring! If I was to nitpick, then I can say that the volume controls don't seem 100% sturdy, but again, I had no problems to match levels as it has "step" movement.