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Very nice Dan, I like it, however, don't you think that cathode bypass cap on the 300B is a little low? The 3Db down point is about 7hz, which puts it about 1.5Db down at 28hz. For those of us that go full range with our amps, it might not be enough. For example, my speakers are flat to 30hz. I have a 300B amp with a 3.5K OPT, and a 1K ohm cathode resistor, there was a noticeable improvement in bass when I went from a 47uf bypass cap to a 120uf cap.

Don't mean to rain on your parade, it's really a nice idea. I like the fact that you wouldn't need a preamp stage. Battery bias, and voltage regulation on the driver stage as well, very kewl.

twystd

Edits: 11/06/09

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