Yes. And the Pass wins by a country mile. More musical, more refined and just better across the board. Except it doesn't have quite the (artificial) slam in the bass department.
I am a Krell owner, not a basher. I have had many pieces of Krell equipment including the two I own right now, but given the choice between those two amps I would not hesitate to get the Pass Labs.
I have never had a problem with Krell customer support or service. To the contrary I have found their support to be exemplary.
The point is, the Pass Labs X-350 is a better amp than the KSA series amps. I have thought about upgrading from my FPB 200 to the X-250 or X-350. Pass labs is making one of the best solid state amps available right now. I cannot imagine how you could be disappointed by it!
The Krell FPB300 and 600 (on now 400 and 700) will also blow away the KSA300S.
Having said that, I own and use the FPB300 for the top end of an actively crossed over speakers with the KSA300S for the most realistic, powerful low end imaginable.
I attend the symphony regularly, so my opinions are based on how systems sound in reference to live, unamplified concert music.
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