People who have a lot more technological savvy than I do could probably explain in more detail how DSP subs work, but the way I understand it is that the amplifiers in them stabilize the signal more than a regular sub along with making it virtually impossible to overdrive it. Environment is such an important part of how subs will sound so unless one has the opportunity of comparing them side by side, especially in the environment it will be placed, I don't know how one makes a choice.