My Sceptre has a solid state rectifier. My tech much prefers to use solid state rectifiers in his equipment for countless reasons, reasons which I don't understand yet, haha. But yeah, don't buy any of the early Sunn tube amps, before the Model T if you want break-up and/or distortion. Am I right Sunn fanatics? Was the Model T the first Sunn tube amp to really do the distortion thing? Or is there one I don't know about?...