Precision Power ICE1300.1D Black Ice Series 1300W Class D Monoblock 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