The C2 Comparator is the active electronic loop control unit for the SC8 subwoofer. The unit includes two balanced audio inputs and two outputs as well as two sensor control loops connected to a 5-pol Neutrik XLR input. The Comparator’s electronic circuit loop measures the voice coil excursion of the SC8 subwoofer and corrects the signal, significantly decreasing distortion. The unit is set for flat frequency response down to 25 Hz (-3 dB).