Class A vs. Class A/B.
Couldn't really say as I haven't left the amps in A\B mode and listened for more than a few minutes when I first got them.
As close as I can say is that I can't tell if or when they've switched from Class A to A/B when exceeding 35 watts.
I can say they draw significantly more amps and watts at idle in A than in A/B. Can't remember exactly but class A was like 3+ amps and 200+ watts from the wall.
There are so many factors with the main one being, imo, what type of music is being played and how good the recording\mastering etc.
I believe that any well-designed, operating to spec amp will not make a large difference PROVIDED it has enough power in all that entails to drive a particular speaker at a real world SPLs.
For the first couple of months I had my current system, I would perk up when something I was listening to had a "flaw", thinking crap my system is lacking here.
I learned that the system was only revealing the source, warts and all.
Put on a better recording and voila, all better.
I really doubt that I will sell my current amps and buy the XPA-1s.
There are other things I could spend my money on that will yield a better return and more powerful amps would be at or near the bottom of that list.
But then again if people only bought what they needed, we wouldn't be having this conversation and AVS forum wouldn't exist
As far as the Gen 2 XPA-1, it's been announced and there are pics of it on the Emotiva forum.
I haven't seen or heard of a release date but I don't follow it that close.
They'll likely announce when the container ship sets sail.Edited by Milt99 - 9/21/13 at 3:20pm