Features: Regulated Power Supply Full Mosfet Circuitry Soft Start Turn-on 3-Way Protection Circuit Gold Plated RCA Terminals Double Sided Glass Epoxy PCB Board Variable 120-800 Hz High Pass Crossover Variable 40-120 Hz Low Pass Crossover 0-18dB Variable Bass Boost THD 0.05% 100mV - 4V RCA Input Voltage 4 x 100W Rms 4 x 200W Max S/N Ratio 92.5dB 1/2/3 Channel Operation Dimensions (W x H x L): 10 x 2 x 16.75