car amplifier, Phase switch: 0o/180o, 8" woofer, 50Hz ~100Hz, RCA and speaker level input. car amplifier Max output power: 160WR.M.S.: 80W69mm Die-Cast Aluminum sealed box, greta for under car set installationPhase switch: 0o/180o8" woofer50Hz ~100HzRCA and speaker level inputThermal protectionOverload protectionShort circuit protection car amplifier with RCA and speaker level input (sw826B)