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just saw this on FB... Joe talking about a new prototype amplifier he is working on..... Cut and pasted from Joe's post; In NZ we demonstrated what is a pre-prototype for an exciting new tube power amplifier with some very original circuitry - not a copy of the usual schematics littered about. It will use a special version of Triode, high frequency bias and a constant current differential cascode acting as combined voltage, phase splitter and driver into four KT120s output tubes, using large Lundahl transformers which are partially cathode coupled. Incredibly linear, amazing bandwidth, the widest dynamic range I believe will exceed any commercially made amplifier. Very stable output impedance that is NOT stabilised by the use of any feedback. As close as possible to 100 Watt Triode amplifier output and if achieved will sound more like 300-400 Watt. The input stage described above will be isolated with an 80H electronic choke. This means that it can act as a completely isolated loop. Price will not be cheap. A state-of-the-art amplifier like this could well be $30,000. A big project indeed. Right now Brian's Elsinore Mk6 speakers are with Terry Humphries at Audio Reference store. He heard about their successful demonstration at Auckland's Audio Club and the Secretary Dave has dropped them off there for Terry to listen to them while its owner Brian is on holidays starting today. I wonder what Terry will make of them? :-) So... interesting days ahead.