3-Way Electronic Crossover Front High Pass: 40 - 400Hz > Frequency Multiplier (x1/x20) > Independent Level Control Rear High Pass: 40 - 400Hz > Independent Level Control Sub Crossover: 21 - 250Hz > Phase Control > Stereo/Mono Control > Bass Boost: 25 - 250Hz > Independent Level Control RCA In/Outputs Remote Bass Control