Sony 2-Channel Amplifier (XM2100GTX) (XM-2100GTX) (Discontinued by Manufacturer) 2- or 1-channel class A/B car audio amplifier Maximum power output 100 watts RMS (200 watts peak) x 2 into 4-ohm speakers; can be bridged for use as a 550-watt monaural amplifier Pulse/MOSFET power supply; accepts line-level or speaker-level inputs; offers stereo line-level throughput for additional amps Built-in variable LPF (low-pass filter) and bass-boost circuit (up to +10 dB at 40 Hz) Measures 12.1 x 2.25 x 7.9 inches (W x H x D)