I'm changing it all. The JL amps that I have installed in the X do not have speaker level inputs. I'm planning on going the route to disconnect the DSP amp altogether. I am going to use the stock wiring and replacing the stock speakers in the front. I'm not going to use the rear door speakers. I've been testing different settings and can honestly say that I do not notice a difference when I have fader full forwardvor balanced between front and rear.