I want to know what everyone's using in their amps. Heads, preamps, poweramps, hybrids, all amps with tubes..list what ya got and how it's working for you. It'll help others compare amp/tube types and give those of us who change tubes frequently, a journal of what we had. Whenever you change tubes, add another entry. Amp: Peavey DTX (Modified JSX) Power: Quad of Sovtex 6550WE. Huge but tight low end, strong but not harsh highs, and a bump in the midrange. Reminds me of a beefy slightly mid restrained KT77. Preamp: V1-JJ EC83s. It darkens the amp up, which it needs V2-Tung Sol Gold Pin 12AX7. Bright and cutting. Not too keen on it to be honest. I wanted definition and thickness, and I'm not really getting anything "stand out" from this tube..not really worth the money IMO. V3-JJ EC803s. Nice high action kinda tube. Gives the signal a kick. V4(Phase Inverter)-Sovtek 12AX7LPS. The stock tube for the amp, it just works better than the other tubes I've tried. Sort of neutral, yet has a good mix of density and clarity I like.