sometimes this system causes a conflict with subs. that system uses a little speaker in one or both of the back speaker that detects distortion. the radio uses this system to then adjust the sound so no distortion comes out. i would just hook it up subs and not worry about it at first and see what happens - just look to see if you hear a pop when turn the car off or if the inside speakers start sounding bad while the subs are playing. if it does then i believe you can unplug the little speaker i am talkin about - its located on the back speaker(s), the smaller one.