Right now, I have one SA-8 in a .56 ft^3 box tuned to about 36 hz. I have 500 watts on it right now. I guess it is good for an 8 inch subwoofer, but I guess I was expecting more. Should I try a bigger box or what? Maybe going from a 12 inch HDC3 to this is kind of a big difference. I don't know where I am going with this. Basically, should I put it in a bigger box or do I not have enough power for it? Am I just expecting too much?