Replaced 2-12" sub box and unbelievable the bass from this little 10" sub. Gently pushing with a Smart 2.5k Amp tuned with JL TWK. The entire trunk is empty now and very satisfied with the quality. (hid the amps, processors and lithium battery in the sub-trunk cooled by a custom cover with 3 fans for cooling). 😎 Very satisfied with the customer care and quick replacement due to delivery damaged sub with bent magnet making a rattle sound from rough handling👌. Originally bought on eBay and didn't install for 9 months before I saw the damage. I was very sure I wouldn't be happy stepping down from two Titanium 12" sealed subs, but I was wrong. The placement of the enclosure is key to the strong bass response and it won't get any better than this. The NVX sub will bottom out with the smart 2.5k SD Amp and may replace with a larger sub - inverted. The formed fiberglass enclosure seems sturdy enough. Overall a very good upgrade that can't be beat!