These powerful amps work with as little as nine volts of power from your battery, and as much as 40 volts (400 watts) of speaker-level input signal. CX-Series amps include vertical and horizontal mounting hardware, so you can show off your install style!. Mono KICKER CX Amplifiers are now stable down to one Ohm, giving you the freedom to put even more subs in your system!. A variable 12dB crossover, KickEQ 6dB variable bass boost and a 24dB subsonic filter on mono amps gives you the control you want - to craft the sound you love. CX-Series Amplifiers are the perfect combination of big power, bigger flexibility and true reliability!.