Ive got two of these in a ported box, wired to one ohm and pushed by a 2400 watt RMS HIFONICS amp and they deliver so much bass its incredible. I’m getting flex in my door skins, my windshield and my steering wheel. This is my 4th installation of a system in my car and is by far the best one I have ever done, I am very impressed by these subs. The day I installed them and was testing them out for the first time in my yard, some guy I’ve never met before pulled into my driveway just to ask “what the hell I’ve got in my car”. He let me know that he was in his driveway a block and a half away, heard my system and had to find out where all that sound was pounding from. It was then that I knew I made a good decision in purchasing these subs. Now don’t get me wrong, if I could afford to get a couple $1500 subs I would but these hit just as hard for a fraction of the price. Excellent, hard hitting, sub for someone who is on a budget but is serious about car audio and still wants professional results!