Precision Power ICE1600.4 Black Ice Series 1600W Class A/B 4Ch Amplifier 2-Ohm stereo, 4-ohm bridged full range operation Direct short, thermal, & overload circuits Protect amplifier 200Mv-6v high level or low level RCA input Tri-mode capable Variable 12Db high, low, & subsonic crossovers / variable 12Db band-pass crossovers