i would image that it would increase the sub presence since taking a lead out of the factory sub out i think has a crossover of 20-80hz and using the clean sweep you can combine the sub out with the front door sub, since the front door subs are (40/60)-100hz. I'm currently planning on upgrading my loc to either the clean sweep setup or the Alpine PXE-H660 or Kicker ZX10SUM8 or AudioControl LC6i too many chocies and they all cost about the same.