question to Plinius Amp owner

I have a Plinius SA-102 amp purchased in 2003. Class A mode makes a lot of difference specially when kept on for one hour.
Caution:
Few weeks back, I observed that the heatsinkls were not as warm as it used to be earlier in Class A.
Please note that over a certain period of time after usage, "Bias" voltage may come down and need re-adjustments. If you feel that the heatsinks are not getting enough heated, then consult your local dealer for re-adjustment

The hotter the amp runs, the more bias drift you can get. Couple that with a low-feedback design and you will need readjustments pretty often.

Old thread, I know. But I could (and others who listened) detect the difference that class A made on my legacy (old, retired, sold) Martin Logan Summits over class a/b.

What I always remembered was that in class a, the voices/imaging were tighter with less fuzz around the imaging. It was very evident and easily detectable.

And this was within about 5 seconds of switching.

Caveat to my statement above... Could hardly tell with less responsive speakers like sonus faber Cremona 1... Could not tell.

But on the summits.... Nearly instant I could tall we were in class a. I'd get up and turn the switch then sat down . As I sat down the sound just physically changes and in 5 seconds I'm in full class a.