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In Reply to: RE: So many 300B schematics...which one? posted by paba on October 05, 2009 at 09:59:54
Hi paba,
Intersting post. I would say it differently, from my experiences:
1) Topology, two stage vs: three, AND topology, 300B vs 2A3.
(On efficient speakers, a 2A3 is the superior tube choice, and a good two stage amp performs better than ANY good three stage. KISS rules.)
2) Power supply
(The chokes and inductor(s) have to be 20 Ohms DCR or less, or you are wasting your time, money, and badly deluding yourself). The SE amp's wiring and lay out needs to be optimized also!!
3) Output Transformer quality
(Yes, it is certainly a factor, but it is "totally trumped" by doing 1) and 2) above. With 1) AND 2) done as best as possible, and a wire-modded Transcendar will very easily outperform ANY of the highest quality outputs you, or any one else, may choose.
The output transformer is the LEAST important of the three, on the basis of overall audio performance, when the amp is built correctly. Very few SE amps are !!
Jeff Medwin
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