The biggest improvement is in the frequency smoothing. You will also get greater output but if you are calibrating the level to match your speakers , unless your current sub is inadequate, you won't see a huge impact here. You will lessen the stress on each sub though as you can lower the amp gain on each. I have 5 subs. The totality of them hits the sweet spot at about 77db. My mains are at 75. ( I like my subs a little hot) since there are 5 of them , none of them sweat on even the heaviest of bass scenes so I never worry.