I have to agree with Mulveling to a large degree. I have heard my modern Tannoys with a rebuilt 8b in pentode and triode. It was sweet and revealing, but lacked the authority and dynamics Tannoy is known for. When I say rebuilt, that included power supply upgrades. I keep going back to putting my EAR 509s in the chain (100+ watts). I loose just a touch of inner detail (and I am a detail freak) for explosive PRaT.
