Anyone built ESP P68 300W amp?

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At the moment I'm building a pair of Tube Zen V4's, P68 is next in line.

What would be better for SQ: MJL21193/ MJL21194 or 2SA1943/ 2SC5200?

What part(s) of this design could be upgraded for better performance?


i think MJL21193/ MJL21194 is better and easily to avalable ...........
and better performance.............
23 Sept 2003 - The new driver transistors (MJE15034/35) seem to be virtually impossible to obtain - ON Semi still has no listing for them on the website. The existing devices (well known and more than adequate) are MJE15032 (NPN) and MJE15033 (PNP), and these will substitute with no problems at all. It is also possible to use MJE340 and MJE350 as originally specified (note that the pinouts are reversed between the TO-126 and TO-220 devices).
 
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