Product details:

Low distortion audiophile sound Adjustable low pass crossover High and low level inputs/outputs Auto on/off 75 watts RMS @ 8 ohms, 100 watts RMS @ 4 ohms This SA100 100 watt subwoofer amplifier with adjustable crossover, high and low level inputs, auto on/off and phase reversal switch is perfect for building your own powered subwoofer. This plate amp offers very stable operation, with full overload protection.