Small footprint - PX-Series Power Amplifiers are specifically designed for motorized vehicles with small battery/charging systems, and in an incredibly small footprint that can be installed in motorcycle saddle bags or fairings, glove compartments and other previously unusable spaces. Easy! No-rust, stainless-steel mounting hardware and a single Molex plug containing all wiring connections makes for easy installation. 2 Turn-on Modes PX Amps utilize a speaker (amplified) or low (pre-amp)-level input, variable input gain adjustment and two auto turn-on modes (DC offset or 12-volt trigger). We are an authorized Kicker dealer!