Crown (AKG) PCC-170 Professional Boundary Layer Microphone (New Old Stock) The PCC-170 is a professional boundary layer microphones with supercardioid polar pattern to minimize background noise and feedback. The microphone is designed for use on boardroom tables or lecterns. The PCC-170 microphone provides a bass-tilt switch, allowing the user to tailor the low-end response and reduce subsonic noise. The included RFI suppression ensures trouble-free operation even with active cell phones nearby. For easy installation, the PCC170 microphone offers an XLR connector and a detachable cable. FEATURES: Supercardioid polar pattern offers high gain before feedback. PCC (Phase Coherent Cardioid) technology for optimum speech intelligibility. Three-position bass-tilt switch for optimized suppression of subsonic noise. Detachable cable for easy installation and service.