I put 2 rockford fosgates r2d4 subs in this box rated at 500 watts rms 1000 watts peak per pair pushing them with boss armor 1500 what mono block d amp but only running on 700 watts at 4 ohms at the moment the box wrorked perfectly sounds great at high level my pioneer deh 6700 head unit goes up level 62 after balancing out all filters i can actual run the volume between 58 and 62 with great clairty cant wait to buy another box and speakers so i can run my amp at 2 ohms and get the full 1500 watts out of it heck at 700 it rattled my front mirror loose this is a nice box tho i disconnected the horn tweeters from the subs and ran them direct to the rear 6x9s which i put bass blockers on so i could get good sound at the same time good bass with out drowning one another out mission accomplished