Pyle PLMRA400 is a high-speed power amplifier with 400 watts of power, designed for both car and marine use. It features two input levels, allowing you to connect to units with BTL circuitry or common-ground types. The amplifier has built-in short circuit protection and can handle speakers with an impedance of 4 to 8 ohms. Installation is easy with the included mounting hardware, and the amplifier comes with a two-year warranty.