Just installed my subs on my stock 6-speaker system. I just tapped the lines to get a remote turn on signal for the amp and for the signal for the subs, I tapped the front 2 speakers. Install was very easy, just used the 16-20 gauge wire tap from Radio Shack. Also took the power line through the firewall through a rubber grommet which houses a thick cable, another cable, and the hood latch cable. Then grounded the amp with a screw under the carpet connected to the chassis. The bass hits realy hard considering the whole cabin acts as a giant box, hits much harder than it did in my Maxima.