The quickest way to get great bass in a system is to install the 10, 100-watt KSC-WA100 Powered Enclosed Subwoofer with built in amplifier. Features include: dual 2-ohm voice coils,a 10 pearl-mica injected-molded polypropylene cone woofer,variable input sensitivity and both pre-amp and speaker level inputs. Just add the vehicle!