The K-CCHP and the K-CCRHP, High Pass Filters that will also pass 48 Volts DC for Phantom powered microphones. These are active third order (18dB / octive) filters. The very low frequencies are attenuated as the signal leaves the pole. What low frequency energy is left in the signal should be completely eliminated by the filtering in the mixer or recorder. K-CCHP: Base unit with XLR male for internal coiled cord incorporating high pass filter for phantom powered microphones. K-CCRHP: Base unit with Right Angled XLR male for internal coiled cord incorporating high pass filter for phantom powered microphones.