lots of possibilities. you could have the sub wired wrong...could be the wrong enclosure.....it has a distorted power supply....i hope you dont want sq out of this sub because you will not get it. please give more info
I put it in a larger box last night and it sounds a whole lot better. I have it wired in parallel it's dual 2 ohm. But the other problem is my amp i think. I don't know any specs on it. A friend gave it to me. I know it has PLENTY of power, but don't exactley know how much. It is an MA Audio. It's huge and he says it's mono block 1 ohm stable, but it has 2 channels to hook up. He still insists that it is mono block. I can't find anything on it anywhere.
I have 2 10 inch hx2's and I think they are doing it too! Sq? Mine ar fine when I'm not cranking it up to full power. But I'm pretty sure it is my box is to big.