TIC  AMP10 Exterior Receiver Amplifier (Black Finish) 5w Peak Power, 2.5w Continuous Freq Resp: 40hz-16khz Imp: 4ohm -8ohm Signal-to-noise Ratio: &gt;80db Sensitivity: 80db at 1w/1m Weatherproof Design 12V Power Supply Cd, Mp3 and Ipod(R) Inputs Imp: 4-8 Ohm Output: 4X Speakers