The KSM141/SL ST PAIR from Shure is a stereo pair of switchable-polar-pattern condenser studio microphones designed for instrument recording and sound reinforcement. The capsule's pattern is switchable between omnidirectional and cardioid pick up. Omnidirectional offers a more generous pickup area while cardioid offers attenuation of noise and ambiance at the off-axis sections of the microphone. In addition, the microphone offers a wide 20 Hz to 20 kHz frequency response making it a flexible solution for a variety of applications. The KSM141/SL's 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.

The KSM141/SL includes a 3-position low-frequency roll-off switch, eliminating low-frequency rumble noise and counteracting proximity effect. The mic handles high sound-pressure levels and features a 3-position pad switch providing attenuation at 0, 15, 25 dB. This allows for confident miking of instruments high in transient response such as drums, percussion, and brass. The microphone is also suitable for recording piano, strings, guitar, and woodwinds. Included with the mic are a case, mic clip, and foam windscreen.
 
The Features
Switchable Patterns
- The KSM141/SL features switchable polar patterns. Omnidirectional offers a generous pickup pattern suitable for recording ambiance, vocal groups etc. The cardioid pattern is tighter and provides effective rejection of off-axis signal.
 
Class-A Transformerless Circuitry
- The transformerless, Class-A output circuitry provides a noise free output signal path while maintaining high gain levels.

3-Position Low-Frequency Roll-Off Switch
- The KSM141/SL provides flexible low-frequency attenuation, eliminating low-frequency noise and rumble.

3-Position Pad Switch
- The 0, 15, and 25 dB Pad switch adds greater SPL-handling allowing the microphone to withstand high audio levels without distortion.

Wide Frequency Response
- The microphone offers a wide 20 Hz to 20 kHz frequency response making it a flexible microphone