The XM-2100GTX features a redesigned heat sink with Sony’s distinctive “Xplod" pattern. Inside, you’ll find a MOSFET power supply and high-current MOSFET output stages for unparalleled power and performance. If you crave bass, dial in up to 10dB boost at 40 Hz for ground-pounding lows. Features include a variable 50-300 Hz low-pass crossover and speaker level inputs. 2 ohm capability.