Class A Solid State Sound

audiobrian

High biased push/pull Class-A sound when all is correct, has an ease to it, almost like you need to turn it up.

Complementary output transistors like Bi-Polar’s generally will punch far more current than complementary Mosfets can.

If both are used in push/pull high biased Class-A like these amps you mentioned, you’ll find the Bi-Polar output amp able to drive far more taxing speaker loads, and therefore sound have a lot more punch when needed into those speakers.

Pass and Accuphase use Mosfets and a Gryphon uses Bi-Polar output transistors, on speakers like most all Wilsons ect ect, I would suggest watt for watt the Gryphon’s

Cheers George

BS Kosst, you can’t get complementary mosfets to do current like complimentary bi-polars can into low impedances! End of story!!

That’s why power amps  that are crowned  "amperage masters", are all bi-polar.

And "if" one owns say a pair of Wilson Alexia (0.9ohm EPDR), there you will see the advantage that bi-polars can give.
EG: Gryphon Anitllion Evo mono
175w Class-A into 8ohms
1400w into 1ohm
7500w peak into 1/4ohm
Sorry Kosst, there is no way complementary Mosfets can do these sort of figures.


Cheers George

I have a re-capped Krell KSA-200S and was wondering if it was bi-polar?


I also have a Krell KSA-250 (OLDER MODEL) & was wondering if that had bi-polar transistors (I think it does).

I like the sound of the old Krells, but some say that some of the newer amp designs are better. I need stability to 1 ohm (Martin Logan ESLs).

I had KMA 100s. Old Krells are all Bipolar output stages. Wonderful amps until one blew.