I have 2 Infinity's that I have not used for more than 2 hours. The reason I used them so little is that I got in a car accident with my previous sub (memphis mojo 12") and while I was waiting for my next car purchase I figured that my memphis would no longer work, so I purchased these. When I got my new car, I installed all the stereo wiring and amp and then hooked up the two Infinity's which bumped extremely well for the 2 hours I used them, and I had the volume turned down low to break them in. Then after a couple hours I hooked up my Memphis and sure enough it worked, and it took up less space, which is why i kept that in my car instead of the Infinity's. I would be willing to sell these two subs and a box that I built for $150. Just reply to this post if you're interested, I will be checking up on it. Thanks!