The KSM137/SLSTEREO is a complete stereo set of KSM137 microphones with an A27M mount. The Shure A27M allows you to securely mount two microphones on a single stand with a wide range of angles and vertical separations for a variety of coincident and closely-spaced stereo configurations.

The KSM137 is an end-address condenser microphone with a single cardioid polar pattern. Designed for studio use, yet rugged enough for live applications, the KSM137 can withstand extremely high sound pressure levels (SPL). Its low self-noise and extended frequency response make it ideal for recording instruments.

Versatile, durable, and precise, the KSM137 is an outstanding microphone for instruments ranging from percussion to wind, strings to brass, and piano to guitar.


– KSM137 Microphones (2)

– A100C Case (1)

– A27M Stereo Microphone Adapter (1)

– A100WS Windscreen (2)

– A57F Stand Adapter (2)


• A highly consistent cardioid polar pattern

• Ultra-thin, 2.5 micron, 24 karat gold-layered, low mass Mylar diaphragm for superior transient response

• Class A, discrete, transformerless preamplifier for transparency, extremely fast transient response, no crossover distortion, and minimal harmonic and intermodulation distortion

• Premium electronic components, including gold-plated internal and external connectors

• Subsonic filter eliminates low frequency rumble (less than 17 Hz) caused by mechanical vibration

• Three-position switchable pad (0 dB, 15 dB, and 25 dB) for handling extremely high sound pressure levels (SPLs)

• Three-position switchable low-frequency filter reduces background noise and counteracts proximity effect

Performance Characteristics

• Extended frequency response

• Low self noise

• Exceptional reproduction of low-frequency sounds

• Can withstand high sound pressure levels (SPL)

• High output level

• No crossover distortion

• Uniform polar response

• Superior common mode rejection and suppression of radio frequency interference

Stereo Applications

Acoustic instruments – piano, guitar, drums, percussion, strings

Wind instruments – brass and woodwind

Low frequency instruments – such as double bass, electric bass, kick drum

Overhead miking – drums or percussion

Ensembles – choral or orchestral

Room ambiance pick-up – guitar amplifier or drums


Cartridge Type: Electret Condenser

Polar Pattern: Cardioid

Frequency Response: 20 to 20,000 Hz

Output Impedance: 150 ©

Sensitivity: 37 dBV/Pa[1] (14.1 mV)

Self Noise: 14 dB SPL-A

Attenuator Switch: 0, -15, -25 dB

Low-Frequency Filter Switch: Flat, 6 dB/octave below 115 Hz, or 18 dB/octave below 80 Hz