Kicker Hideaway 51HS10 Sub 10" Compact Powered Active Underseat Subwoofer 180w RMSHideaway 51HS10 The Hideaway 51HS10 is a compact powered 10 inch subwoofer that delivers surprising low frequency impact in a tough, all aluminum frame. FIT PLUS KICKER innovates once again, with FIT+ (Fail safe Integration Technology PLUS). Accepting input signals ranging from a mere 0. 25 volt to as high as 40 volts (400 watts at 4) and fully compatible with newer vehicles using start stop systems, the HS10 works with almost any vehicle on the road