inputs.text: must amp - kicker models sold not recent one purchased not come input new car audio rehemote allows turn levelvolume amp subwoofer directly without go stereofs bass subwoofer output setting screwed simply velcroed flat surface dashboard note using velcro glue not hold car sits sun warmhot days found using small 1in square pieces instead longer pieces keeps everything place even summer switching radio stations different media sources ipodcdsatellite radio etc common issue come across different levels bass usually much radio able instantly adjust bass turn knob feature install every car