SET Asylum

RE: How useful a solution is a parallel SE amp?

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In Reply to: RE: How useful a solution is a parallel SE amp? posted by andy evans on February 28, 2008 at 03:25:00

I came across this old post by Thorten Loesch:

"In an Amp of mine which was able to run only of two PSE 300B's without blowing the Valve up the sound was on certain types of music so massively improved that I have been forced to conclude that "PSE Lewinskies" (i.e. "sucks" for the historically challenged - ed.)Disregarding dry theory, I find often PSE much worse sonically than Push-Pull using the same valves. Gordon Ranking attributes the sonic issues to what ammounts to current hogging, with one valve reducing it's dynamic contribution with the other taking more current, this in turn shifting biases and reversing the process, so that in fact the valves do not operate truley parallel but in a sort of see-saw fashion. So far very limited and incomplete simulations in P-Spice suggest this view may be more real than we may wish to believe. "

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RE: How useful a solution is a parallel SE amp? - doughter 06:43:57 02/28/08 (0)

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