Anyone listen to Zu Audio's Definition Mk3?

Thanks Larry,
No I''ve not heard them but always read good comments about them.Given your vast exposure I thought you might have had the opportunity.
Regards,

Another "full range" speaker that I heard that really blew me away (don't know why I forgot about them until now) is a circa 1940 Jensen field driver (13" cone, built in tube power supply). I heard a system that uses this driver crossed over to a tweeter at, I believe, 8 khz (all but the highest octave being reproduced by the Jensen driver). This is the best overall sound I have heard from a full range or nearly full range single driver system. There was very little of the midrange peakiness of full range drivers--the sound was rich and warm and good with even large symphonic works (a problem for other full range drivers like the Lowthers), and bass was surprisingly decent. It is VERY unfortunate that this is an extremely rare speaker and there have been no successful attempts at cloning this driver.

Charles, just spoken to Sean at Zu. Their top option for cap upgrade to the Def 4s tweeter is the Duelund VSF Black Cu. He's not familiar with the CAST and hasn't experimented with it. So the Black VSF is where I'm going.

Spirito, since my Def 4s are under construction and Sean says their top option for cap upgrade to the tweeter is the Duelund VSF Black Cu, isn't that something I should have him install? Why o why doesn't he install that cap fro the get-go? $$? Why are you seeking a cap upgrade, and how did you figure out it was a cap you needed?

Spirit,
The VSF Black is the model just below the CAST and is thought to be one of the finest capacitors available. I think you`ll be very pleased with your results.The quality of cap matters a lot in terms of maximizing sound. If it did`nt, Zu would`nt bother with offering higher level upgrades.
Regards,