Power Acoustik Caliber Class D Monoblock Amplifier, 2200W RMS/4500W MAX 2200 Watts RMS/4500 Watts MAX 2200 x 1 RMS @ 1 Ohm 1500 x 1 RMS @ 2 Ohms 900 x 1 RMS @ 4 Ohms DIM (WXHXL) 9.5? x 2? x 13.24? 1 Ohm Stable Bridge 2 Monoblocks Together for Double Power! Bridging RCA In/Outputs Military Grade PCB with PWM MOSFET Power Supply Direct Short, Thermal, & Overload Circuit Protection Low Pass Crossover: 40 - 180 Hz Subsonic Filter: 10 - 50 Hz Low Level Inputs 12dB Bass Boost 8ga. Speaker Connections 4ga. Power Connections Remote bass knob