For $3,400 you can acquire a beautiful, 68-pound music machine decked out in a rosewood-looking base, chrome top and front plates, and accents to complement the big-ass tranny covers. Like the Diavolo, it's a zero-feedback design but does not offer an automatic biasing circuit. The 300B is a bargain for the lower-sensitivity speakers it's designed for and a great way to enter the world of SET amplification.