True, but then I would have also had to buy a unit to give me all the control over the crossover, phase, and polarity. I would need quality interconnects, more outlets, and space for both units. Then, I would still have to buy a great sounding sub. Now granted, I would have done all of this (as needed), if I couldn't find a great sounding sub that incorporated all of these features. But believe me, the DD-series do deserve a listen. While I slightly preferred the sound of the SW1, the difference was not as great as I thought it would be, and when you consider the price difference, that's pretty incredible. I guess what I am saying is that I am not convinced that I could have bought a noticeably better sub (at least not for my system).