Monoblock subwoofer amplifier, vario bass EQ circuit with up to 12 db of boost, 24db per octave subsonic filter, highly efficient Class D design, 1 x 200 watts RMS at 4 Ohms, 1 x 300 watts RMS at 2 Ohms, 1 x 450 watts RMS at 1 Ohms, 1300 watts max power, 0.2V to 6.0V input sensitivity range, compact 9.84 x 2.03 x 8.3 inch dimension, conformal coated PCB, space-saving mass aluminum heatsink, micro class A/B topology, high-speed MOSFET devices and adjustable hi-pass and lo-pass crossovers.