Anyone listen to Zu Audio's Definition Mk3?

Spiritofmusic,
Will it be possible for you to actually compare these amplifiers in your system? I`d think the Audion and ASR are different enough that you`ll definitely go in one direction or the other.

Well Charles, ASR, Audion and Dave Berning all have distributors in the UK, and pre/pow combinations are all in the £10000-15000 range.
Firstly, purchase of the Def 4s and new tt/arm have pretty much emptied my bank account, and a little upturn in the World economy would be SO good for business.
Because the Hovland pre/pow has served me so well, amp upgrade is something I'm curious about, but is not a priority right now.
So as a fan of ASR, is it not overkill on the power front mated with the ultra high eff Def 4s?

Spirit,
It seems you have built a truly excellent system,congratulations! Without question you`ll get numerous opinions regarding which power amp is better for your system.The ASR does seem to be overkill power(on paper anyway) yet I don`t doubt glory,agear or others who prefer it(why should I?). The issue is what type of sound moves you and connects you to the music you enjoy.

Depending on your ears and taste I could see any of the 3 choices working out great for you.For me given my preferences and priorities I`d buy the Audion amp in a heartbeat.But as we all know it purely personal choice as opposed to some infailiable objective rule book. Hey, just buy which ever one sounds best to your ears when the time comes. It is pointless to argue about which amp is better in absolute terms, audio is the epitome of a subjective endeavor.
Regards,

I asked the Zu boys the same question on to much power. With a smile I got the answer of the more power the merrier. ASR power is a great match with the Def speakers.

Make sure you use clean power with such an amp like the Purepower unit. Plug it into the wall and suck on an egg.

Hi Glory, don't believe in conditioning, convinced it can suck the dynamics out of a system (poss. restiction to power amp peak current). Much more convinced by balanced power, aiming for a 9kV unit with enough headroom for any amp out there.
The consensus on ASR seems to be that it is the champ on transparency, soundstaging and dynamics, but leaves many listeners with a cool, detached presentation.
Will be fascinated to investigate this further. 213Cobra no doubt will feel SET amps fill in the emotional quotient in presentation.