4/3/2 channel amplifier, 4 x 50 watts RMS at 4 Ohms, 4 x 90 watts RMS at 2 Ohms, 2 x 180 watts for subwoofer, 560 watts max power, 0.2V to 6.0V input sensitivity range, compact 7.88 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.