Zu Defintion 1.5 vs Def IV


very quick electrical surges due to hurricane Sandy blew one of my sub amps. Now, I'm reconsidering the IVs or having Zu replace the blown amp. Is the upgrade to the IVs worth the $$? Any Zu owner that can site specific differences, kudos, etc? Bass as prodigious as earler Defs? The whole nine if you could. If it be easier a call would be very cool. 516-316-3311...Phil, you were responsible for my Def 1.5 purchase. Please give me another shout. thanks in advance.
warren
128x128warrenh
The Def 3 (for roughly 1/2 the cost) is not a bad option either. If Zu is still selling them.
Houston we have lift off!
Def 4s it is. I'd still love to hear about what I'm going to hear...
Mark could you compare the Def 3 to the Def 4? You might be one of the few who can shed light on the two. I have the 3's and love them.

And how is your new amp working out? What did you decide on after the PX-25?