The Shure KSM141 is a Dual Pattern Condenser Microphone that offers transition between cardioid and omnidirectional patterns and features extended frequency response, pad for handling SPLs, a gold-layered Mylar diaphragm, and a subsonic filter for low-frequency rumble. The KSM141 is a dual-pattern end-addressed condenser microphone with a rotating collar, allowing easy switching between a consistent cardioid or true omnidirectional polar pattern for smooth and extremely focused sound reproduction. Product Specifications: Cartridge Type: Electret Condenser Frequency Response: 20 to 20,000 Hz Output Impedance: 150 ohms (actual) Power Requirements: 48 Vdc phantom, 4.7 mA Common Mode Rejection: >50 dB, 50 Hz to 20 kH Signal to Noise ratio: 80 dB Weight: 156 g (5.5 oz