Clayton or Pass Class A, which one do you prefer and why ?

Pass Labs is alive and well.
Clayton Audio not so much ....

Neither. For my money I would much rather have an amp from CODA, Accuphase or Luxman. These amps have fantastic class “A” musicality, bass slam and very high quality parts make up.

Threshold and Plinius would also be on my short list. Take your time and read reviews. Many top choices are available currently.

For my money and maybe even yours I don't buy Japanese solid state. Nor did I say that I was going to buy either Clayton or Pass.
There are many who like both of them, though, and I am interested in their impressions.

@dill 

Clayton Audio not so much ....

As of a year ago, and currently to my knowledge, Wilson is still actively upgrading and repairing Clayton amps.  He upgraded mine.

Mitch is correct. Wilson Shen, owner of Clayton Audio, is now serving customers directly.  He can be reached at:

Clayton Audio
8151 Stratford Ave.
Clayton, MO 63105
TEL: 314. 862. 6017
email address: claytonamp@aol.com