Anyone listen to Zu Audio's Definition Mk3?

The Def4 sub amp outputs a rated 400w into the sub-bass driver's nominal 6 ohms load. The amp is sourced from Hypex, an OEM version of the UcD400. It's as much responsible for Def4's seriously improved sub-bass performance as is the downfiring driver, over earlier Definitions.

Phil

I upgraded my 2 Mini Method amps to the new def 4 hypex versions, they are 400w as Phil says and sound far better than the old 120w ones. Bass is deeper and faster with way more headroom BUT the PEQ functions are far better allowing superior integration with the mains.

The high frequencies of the 4s are what are really impressing me at the moment. I've heard other spkrs with more "spectacular" treble, but it always in the long run seems discontinuous from the mids.
In comparison, the 4s' high end sounds so organic, and continuous with the mids. I'm sure this is a function of the new nano FRDs being so much more snappy and transparent, covering a good deal of the higher spectrum anyway, leaving the Radian supertweeter less strained and more integrated. It can't be any coincidence that there's no complicating xover to contend with.
I'm finding my Hovland amps are synergising nicely, but am still interested in hearing opinions as to whether a Duelund CAST Cu cap upgrade will enhance further sweetness in the presentation. Need more opinions please.

Zu continue to amaze. Just got back from ESCO a modded Zu 103 cart. Within SECONDS of the stylus dropping in the groove, I'm in analogue Heaven.
Sean and the guys are engineering geniuses to take the humble 103 and boost it's performance to make it work right at home with what I believe are spkrs performing right at the apex of what's possible.
Had been considering the Straingauge cart, but not so sure now, really believe synergy may be everything.

I'm right in 'the zone' listening to the ESCO modded Zu 103 cart on my tt thru the Def4s. It so outperforms the 4x more expensive, and more celebrated, Transfiguration Orpheus, that it's beyond a joke.
An amazing synergy is going on between these two components, maybe no surprise since Sean and the Zu team voiced the 4s specifically around the strengths of the Zu 103.
It's no coincidence that the most difficult components to get right in an analogue based audio system are the transducers (ie cart and spkrs). They hold the key to the 'flavour' of the system, and it's so easy to get their choice wrong. Thus it's great that both these components have a deliberate similarity in tone and feel.
So any tt users who are running the 4s, do yourself a favour and get the Zu 103, and even better still get the ESCO modification, you won't be sorry.