The KSM141/SL Stereo from Shure is a switchable polar pattern, condenser studio microphone pair designed for instrument recording and sound reinforcement. The microphone capsule is switchable between a true omnidirectional and a cardioid pattern using a rotating collar. The omnidirectional pattern offers a greater pick-up area, while cardioid offers attenuation of noise and ambiance at the off-axis sections of the microphones.The microphones offer a wide frequency response, making them a flexible solution for a variety of applications. Each microphone element features a permanently biased transducer design, resulting in clean, accurate signal reproduction and frequency response. The transformerless Class-A output circuitry provides a noise free output signal path while maintaining high gain levels.