The SA Zv3 is a pretty sick sub.
We tried a D1 Zv3 in Cory's truck in 2.5cuft@36hz on an IA20.1 (original version) just to see what it would do. We already had the box built...I was just a demo box we had around the shop for the sound-room. We have found that in-vehicle, this sub needs a smaller box and lower tuning though. We plan to do a center console box in Cory's '04 quadcab ram very soon. Thinking ~2-2.25cuft @ 30-32hz...just have to crunch some #'s and nail down the design.
Even though the current box is somewhat off from what the Zv3 wants in this vehicle, it still performs amazingly well. I just want to tweak the design to tailor it to Cory's listening habits better.
I have to say, the Zv3 is insane for the $. People that buy Kicker L7, Memphis Mojo, RF T2, and other mainstream subs would be very sad when they get outperformed by the SA-Zv3