Class A Solid State Sound


Would someone kindly describe the differences in class A sound of Pass XA.8 series, Accuphase A-70/75 series, and Gryphon class A amplifiers. Does much or any of the differences relate to mosfet (Pass and Accuphase) or bipolar (Gryphon)  output devices?  Thank you!

audiobrian
More false and irrelevant information. Keep trying...
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I thought you had some knowledge Kosst, but you don't your clearly just a Pass Kit diy'er, that suddenly thinks he has some.

Seeing your always spruiking good Nelson Passes name.  
I challenge you to have Nelson come onto this thread and state that complimentary pairs of  P and N channel fets, can put out more current into low impedance loads than the same amount of complementary pairs but in NPN and PNP Bi-Polar (BJT). 
Lets not forget the difference feedback can make. 

IMHO it is nearly impossible to talk purely about the output stage class in isolation of the feedback method, if any.


Also, with so many high bias AB amps, I venture to say you listen to them mostly in their A range anyway.


3 Amps I think you should listen to, are Luxman, Ayre and Pass. I can't see you loving all of them at once. Sorry, no experience with Accuphase, however if you are the US distributor and wish to provide me with a review sample, message me. :)


Best,
E
I guess so much relates to implementation.
Both Accuphase and Luxman amplifiers enjoy excellent reputations. Accuphase employs Mosfets and toroidal transformers, while their Japanese competitor, Luxman, employs Bipolar transistors and EI transformers.  Interesting indeed!
What you will get running a Class A Pass amp into a 2 ohm load will be a very hot amp that will probably shut itself down or burn a hole through your floor. Into 4 ohms and up Pass class A amps will switch to AB at their rated power and continue on probably doubling that. God knows what the Xs 300 will do. IMHO there are very few speakers with impedance that drops below 2 ohms worth listening too. The amount of power any amp will put out is determined primarily by the size of the power supply. Whether or not the amp can safely transfer that power to the speakers depends on the capacity of the output stage and the size of the heat sinks. Power is power as far as I am concerned. I do not care about the type of output device used. It is all about topology and durability. I expect an amp like the $90,000 Xs 300 to run for a life time. If it can't I am not interested.