The XM-2200GTX 2-channel amplifier puts this reliability to good use with 200 watts RMS power per channel (or 500 watts RMS bridged), plenty of power for a subwoofer or two. The variable bass boost (0-10dB at 40 Hz) kicks up the lows when it's needed, and you can switch on the variable low-pass filter to keep the low frequencies tight and crisp.