Anyone listen to Zu Audio's Definition Mk3?

Phil, your thoughts on toe in are spot on, I've reverted to a less acute angle for the 4s, their axes now intersect just behind the listening position. I'm still having frustrating issues dialling in analog, and am of the firm opinion that these spkrs are so revealing that components upstream really have to be performing of their best (which my tt obviously isn't quite).
I've decided to install a wall shelf to give the best inert platform for my tt, comprising, in sequence, wall brackets, 30mm slate shelf, sorbothane hemispheres, and second 30mm slate shelf. I'm confident this will give my records the shot in the arm the Def4s demand.
Can anyone out there tell me if I should be hearing anything adjusting PEQ on back of the 4s, to my ears nothing discernable.

I'm finally cracking the conundrum of the 4s, ie so much potential, but so many ways to not get them to sound that great. I've really been struggling getting esp. my tt to sound on a par with my prev 2s, and this has been spoiling my overall enjoyment of the 4s.
I've returned to less toe in, the spkrs are now 8' apart centre to centre of drivers, axes intersecting a few feet behind me, such that I can see a little of their inner walls, 14' to listening position and rear of spkrs 4' from front wall.
But, most critically, I've tamed the bass by turning the Low Pass Filter down to 40, and Volume down to 5. This has allowed bass to bloom more naturally in my space, and removed all hints of boxiness that was obscuring transparency and drawing attention to the cabinets.
The spkrs esp. on playing vinyl are now transformed, delicacy and transparency really heightened with deep bass only evident when present in material, adding that final jump factor back into the presentation.
I really couldn't be happier, aided by the fact that I'm incorporating a Symposium Isis rack into my system, really dealing excellently with vibration control.

Glad to read of the luck you've had, Spirit. My system is consistently enjoyable, but I'm not sure its always preferable to my Def 2s before I installed the nanotech drivers.

I'm admittedly poor with setup and that is likely the issue as I believe my supporting equipment to be quite good and up to par.

Any Long Island Zu experts out there want to lend a hand in fine tuning?

In most rooms, running the low pass filter above 40Hz is just too high. My LP setting is 38. Perfect. This also keeps excessive bass energy out of the vinyl mechanicals. Too much overlap with the FRD low end output if you're well above 40Hz, though can be helpful if you have a bass suck out in that 40Hz - 80Hz range.

Gopher: Next time I.m in New York....

Phil

So Phil, you set low pass filter at 38, me at 40. Where do you set volume (me at 5), and are you getting any change with both PEQ and phase settings (I'm not)?
The 4s are so revealing that I think I'm hearing my SS power amp fingerprint in the sound and am very tempted to go all tube.
I'm very aware of your preference for the Audion Black Shadow, but my UK Zu dealer also installs Atma-Sphere, and advises keeping my Hovland HP200 tube pre, and partnering it with the Atma S-30 OTL amp or even the Novachron triode OTL amp.
I have to say if choice was down to art deco looks to die for in an amp, I'd snap up the Novachron in an instant! Very little discussion of this unit on the web since it's only been reintroduced recently, but your forthright opinions on the Novachron and S-30 would be much appreciated.