THoughts on how a pair of ef80 sound vs a 12au7 in low watt push pull amps, such as Robrob's micro series? Youtube videos really dont translate well, in my experience. I built the RR JCM800 Mirco 1w 12au7 version. It sounds pretty good; I'm not disappointed nor WOW'd. I omitted the Lo input; should have included it I think. I play mainly 70's classic rock into early 80's metal. Think Bon Scott era through Back in Black AC/DC to early Iron Maiden/ through Powerslave. Just wondering.