100w class A or 200 w class AB ????

I have read in Pass Labs white papers, the Pass X and XA amps only utilize feedback locally to assist Supersymmetry.

The X600 runs class A to 150watts. The sound never thins out or is audibly distorted A or AB.

Sean, for the record, you are making a habit of crashing threads.

Tabu, hell if I know, but with my Pass X150 running into AB after only 15 watts, I never could tell the difference. With my Scinnies, the X600 does that after 150 watts, and I still can't tell the difference.

From what I have gleaned, Class A can do without feedback, and that is a very good thing. Direct coupling is a good thing too.

There are amp builders who accomplish both.