Class A amplifiers - which are considered the best

Plinius SA-103, SA-Reference

Anyone have experience with those two?

The amps run in AB mode but can be switched to Class A at the flick of a switch. Plinius claims this allows the amps to be powered ON all the time. You just flick it to A before listening. And after a period where there's no input signal, it switches back to AB.

Sounds neat.

I thought the Plinius SA-Reference which claims 2x100W Class A was already quite a big claim, but has anyone seen a Karan S400 which claims to deliver 470W x 2 Class A in an even smaller chassis!

@Sidekick I do agree the Karans do sound good but their claims for 470W Class A in that chassis that's comparable in size to the Krell 25W mono blocks seems odd, don't you think?

Didn't Nelson Pass create the sliding bias thingamabob?
:)

So does this sliding bias affect what George was talking about earlier when he said there was no way amplifiers could do 100s of watts of power in Class A mode?