Power Acoustik C30XR 3-Way Electronic Crossover with Remote Dash Mount Bass Knob Control 6-Channel low-level input 2/4 channel input selection Independent front/rear high Pass 3-Way Electronic Crossover Stereo/Mono Switch With Low Pass Front High-Pass: (X1) 32800Hz, (X10) 3208 Khz rear High-Pass: (X1) 32800Hz, (X10) 3208 Khz Subwoofer: 50160 Hz