All SS amps (other than hybrids) are 100% guaranteed to not use tubes. They excell at that. Good tube amps excell at "low level detail" and are quiet, or zillions of serious listeners wouldn't be using them. Does anybody really say, "I like tube amps SO much I'll put up with crappy, distorted no low level detail weak sound?" I've spent a lot more money over the years on SS hifi amps than tube amps (including reliability issues with some otherwise well regarded SS stuff), except guitar amps...tube guitar amps continue to bury attempts to market SS amps, although SS keeps trying to raise its little head up in that market (modeling amps, tiny practice amps, etc). Pretty much every professinal guitar player, except a few jazz dudes, use tube amps. I don't claim well designed SS hifi amps suck, that would be kind of lame...I own a few I like. I do enjoy modern tube amps more though, as the designers seem to have figured out how to get slam and power out of 'em and currently they give nothing up to SS in audio clarity. They didn't used to (really...they didn't), but they do now. For mirthless Melbguy1 I'll add that I DO enjoy spending money on tubes...there...I mentioned it...it's fun.