Hifonics HFXR 2-Way / 3-Way Electronic Active Crossover w/ Remote Bass ControlBRAND NEW HIFONICS HFXR 2 Way 3 Way Electronic Active Crossover w Remote Bass Control Key Features: 2 Way 3 Way Electronic Crossover Select 2 channel or 4 channel inputs with switch Bass boost (0 12dB @ 45Hz) Maximum pre amp output: 8. 5 Volts RMS 45Hz Bass boost with quasi parametric EQ Can be used with mono or stereo woofers 180 degree phase shift switch Front channel high pass frequency: 32 400Hz in the x1 position, 640 8,000Hz in the x20 position