I'm interested in the SD-2 shallow mount sub, as I have limited space in my truck. Right now I have an Alpine PDX-M6 amp with 600w and a JL W3v3. But I want more bass. These Sundown subs have crazy excursion, like 24mm each way, vs the 14 of my JL. Would that get me a little more SPL? If you have sundown gear, I'd love to hear it, before I buy it. That's the issue with buying internet only gear. So if you have it, and are willing to demo, or if you've tried it, and it failed spectacularily, let me know.
I would use it in a .6 cu. ft. box, a little larger than the recommended .5 cu. ft. sealed enclosure.