Rockford DSR1 8-Channel Interactive Signal Processor w/Integrated Module & ADS HRN-AR-CH4 Vehicle-Specific Amplifier Replacement Harness HRN-AR-EXT4 4-Meter Extension Cable Bundle

You can add any and everything aftermarket with this set-up and still keep that factory head unit in. I love it, gives you all the controls you need in the pal, of your hands, I can control volume, equalizer, crossover, time delay, hz, gain even the volume of my subs from my phone, tablet, or computer. Ill buy it again if I have to do another vehicle