F6 Amplifier

@Zen Mod,

Thank you for pointing this out.
I reread the F6 article on Firstwatt website. Nelson clearly states that F6 was build with SemiSouth SJEP 120100.
As I'm going to upgrade my F6 to Mk II version soon (I will add second PSU to make it a dual mono), maybe I could test it with some other output devises. Can you suggest any other alternatives with reasonable prices and availability (FET rolling!)?

Best / Smelay