Hi @snapsc well they aren't technically full burned it yet. this is the craziest speaker so far... they keep changing, thankfully for the better. Made the mistake of changing several things in my system at same time as well, so I'm trying to let everything play in together for a good 100-200 hours before I make a final judgement.
Zu states the U6S reacts to all component changes, more so than the lower line. so pairing up with what the Zu wants seems to be key. I've noticed this first hand. I've never had a speaker that sounds so different with different amps, etc.
Compared to the Zu’s right now my omegas flow better and are smooth while Zu has a little more bite in the details (I still need to put 100+more hours on them to be fair). This might be explained as stridency...
But at the same time I feel the Omegas have plenty of details and aren’t hiding lots of stuff. So it’s kinda perplexing. Being sensitive to equipment changes, any change shows thru. Which can be good or bad. While Omega seems to be good with almost whatever I connect to it. I guess you could say they are more forgiving which could be “bad”, compared to the Zu's really staying true to what's behind them.
The sound stage is huge though. Very nice and big. Low end is there with the right amp. my 421a tube amp is great but I feel I need to connect my sub to get some of the lower end grunt. But with my solid state stuff, a Naim Atom, Valvet E2, I feel the low end is satisfying and don't feel I have to add a sub. But from my experience once you have a sub in your system, it's hard to unheard
I think part of my issue too is I made so many changes. I was trying to simplify down to an all in one integrated from all separate devices. but I'm finding the DAC's in these all in ones very lacking. I much prefer NOS R2R/Multibit dac sound... so I will also be reverting back to a NOS/R2R dac soon.
with that said once I get the new DAC I will give everything 2 weeks to play in fully, then do my final love it or leave test, take advantage of my 60-day return window.