I like what the 833-A triodes do for the bass response of my woofers. My 833-A SET amplifiers are homemade because I could never afford the few commercially made ones available. I run it on 1000 Volts with interstage transformer coupling (Hammond 126B) for a 245 to drive it at zero grid voltage and a Hammond 1642SE output transformer. It was work to perfect it, but I have a design that works beautifully.
