This sub is a mixed bag for me. I have one in a sealed enclosure built to spec @ 1.8 cubic ft. The mixed bag part is this: sometimes it sounds awesome,, playing Biggie or Lil Wayne songs. At times my 1 12" sounds like 2 12"s! However, it seems to sound weak when playing higher bass tones, in the 80 - 100hz range. It also lacks on some low tones too. It seems to distort right when you think its gonna knock your socks off, forcing you to turn it down a little or risk blowing the sub. It also has trouble with fast transitions, as in the sub is not all that 'quick'. I mean, this thing is built like its preparing for a 9.5 earthquake, but it doesnt live up to its appearance. Honestly, I think Boss Audio overrated this sub quite a bit. When you factor in the price, I would say its pretty good for your money, but I would rate it with other 500 watt RMS subs, not 1000 watt subs. I feel that Boss just tried to hit the market with a product that looks powerful, but performs in the class below the one its supposed to be in. I could see, however, that if you had 2 or 4 of these and gave em 400 - 500 watts each, you could have yourself a budget system that slams. In Conclusion - A powerful sub, to a point. You have to treat this sub like a 500 watts sub.