Major changes: 1. $5999 starting price 2. Okoume standard finish instead of hickory 3. Bigger cabinet - up from 31.5" to 36" 4. 120 days to audition in home!
Zu claims Druid 6-type performance, deeper bass than mk.II, more amp friendly, horn-like impulse response. I am intrigued. Soul Supreme is a nice value at $4500 so Zu must really feel this a step up in performance to price it above that.