I recently installed a complete stereo in my truck. Im ready to tune everything but the subs just do seem to be as responsive as I would have thought. I have 2 kicker cvt subs with a kicker 750.1 to run them and then the speakers are kicker Component 6.5 in front and 5.25 in back with a 350.4 to amplify them. the head unit is a panasonic 7" flip up screen. the subs are wires in parallel. what would be a good starting point as far as frequencies and gain levels for the entire system any help would be appreciated