This is for Georgehifi especially but others can chime in.

MOSFET amps that will deliver massive current all day long.

Of course they can, but the same done with BJT's (Bi-Polars)  will do even more, you clearly need to do some homework on this, as your not as knowledgeable as you think you are. I don't bully, it's fact.

Cheers George

kosst, don't waste your energy arguing. Your opponent is a self proclaimed know all and expert in all fields related to audio and electronics, all without having even built one. He even puts Ralph (Atma-Sphere) who's been designing top shelf gear for decades on notice.  Just move on...

I just can’t stand seeing BS put up, and have to give the truth. There is no such thing as an amp that can double it’s wattage the way he quoted. And if you believe Mosfets can do current better than BJT’s then your just as bad.

As far as Ralph he great and we agree on many things, except for his instance on Zero auto transformers being a fix without any negatives, which they are far from, and are just a bandaid fix for a problem of not having the right amp for a given speaker.

Cheers George

Kalali, I think your right. He just makes it up. Clearly he's never seen the measurements on a Pass amp or any number of MOSFET amps. He doesn't even know that the limiting factor in an amp doubling it's power isn't even the active devices. 

@georgehifi 
Since you're hung up on the doubling power, which you say is impossible, I'll tell you how to do it. Remove the source resistors in the source follower output stage of a MOSFET amp. Guys do that all the time in the DIY world, but you practically never see it in production gear because the line between stable and unstable is pretty fine. You don't really want to try that with BJT's because of their more aggressive thermal runaway characteristics. But, if you use MOSFETs with a big enough heatsink, there's a point of equilibrium and you can build a fairly stable amp.