Boss Audio Systems R1100M is a powerful monoblock amplifier that delivers 250 watts of RMS power into a 4-ohm load, and 500 watts into a 2-ohm load. It features a variable low-pass crossover, fixed high-pass crossover, and a variable 0 to +18dB bass boost. The R1100M is also bridgeable, allowing you to connect two amplifiers together for even more power. With its robust construction and advanced features, the R1100M is a great choice for powering your subwoofer system.