Summary: Purchased these for my Lincoln LS, I put them in a non-ported box. They hit well with my 1400 watt rockford amp. I thought they would blow with all that power, so I sold them to a friend, and purchased 2 jl audio w6 subs.
Summary: To me Rockford Fosgate is the best sub money can buy. When you put these subs together with the right Fosgate amp you will be more than satisfied with the bass I promise you. I replaced the bose single sub in my car with this fosgate and it sounds better than alot of cars with two subs.
Conclusion: WOW this is one heavy ten, i got it runnin off a rockford 300s amp bridged @ 4ohms. Just got it in and can't wait till after brake in period cuz it already sounds good even in a sealed box. You know as soon as you get this thing that it's quality, the heft as mentioned and the advances in cone materials and the vast surround makes for good looks and added cone surface which meens more boom. Plus most of the subs I looked at around this price don't have push terminals.