Shure KSM137 Cardioid Instrument Microphone

Condenser Mic - Cardiod Polar Pattern - Transformerless Preamplifier

4.5 out of 5 stars

What's in the box:

  • Two KSM137 Microphones
  • Two Foam Windscreens
  • A27M Stereo Microphone Adapter
  • Two Stand Adapters
  • Carrying case-year
  • Limited 2-Year Warranty

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Shure's KSM137/SL-Stereo (SHU-KSM137SLST) is a stereo pair of cardioid instrument microphones that provide extremely natural response and sound capture. Engineered for live performance and studio applications, these mics have a multi-position low-cut filter and dB attenuation switches for superior handling of high SPLs. The beautifully crafted design includes premium electronic components, such as gold-plated internal and external connectors that contribute to the versatility, durability and precision of this microphone. This microphone requires phantom power and performs best with a 48 Vdc supply (IEC-61938). However, it will operate with slightly decreased headroom and sensitivity with supplies as low as 11 Vdc. In addition to the standard accessories, this stereo pair includes a stereo stand adapter (A27M) for mounting two microphones on one stand.


  • A Highly Consistent Cardioid Polar Pattern
  • Ultra-Thin, 2.5 µm 24-Karat Gold-Layered, Low-Mass Mylar® Diaphragm
  • Class A, Discrete, Transformerless Preamplifier
  • Subsonic Filter Eliminates Low Frequency Rumble (Less Than 17 Hz) Caused By Mechanical Vibration
  • Three-Position Attenuation Switch (0 DB, 15 DB, And 25 DB) For Handling Extremely High SPLs

With a history of innovation that began in 1925, Shure has turned a passion for making great microphones and audio electronics into an obsession. Shure continues to set the worldwide industry standard for superior, reliable products.

Specifications for the Shure KSM137

{ "Cartridge Type" : "Electret Condenser", "Polar Pattern" : "Cardioid", "Frequency Response" : "20 to 20,000 Hz", "Output Impedance" : "150 Ω", "Sensitivity" : [ "open circuit voltage, @ 1 kHz, typical", "–37 dBV/Pa[1] (14.1  mV)" ], "Maximum SPL" : "1 kHz at 1% THD[2]", "PAD ON" : { "5000 Ω load" : "170 dB", "2500 Ω load" : "164 dB", "1000 Ω load" : "159 dB" }, "PAD OFF" : { "5000 Ω load" : "145 dB", "2500 Ω load" : "139 dB", "1000 Ω load" : "134 dB" }, "Signal-to-Noise Ratio[3]" : "80 dB", "Dynamic Range" : "@ 1 kHz", "5000 Ω load" : "131 dB", "2500 Ω load" : "125 dB", "1000 Ω load" : "120 dB", "Clipping Level" : "20 Hz to 20 kHz, 1% THD", "5000 Ω load" : "15 dBV", "2500 Ω load" : "9 dBV", "1000 Ω load" : "3 dBV", "Self Noise" : [ "equivalent SPL, A-weighted, typical", "14 dB SPL-A" ], "Common Mode Rejection" : [ "10 to 100,000 kHz", "=50 dB" ], "Attenuator Switch" : "0, -15, -25  dB", "Low-Frequency Filter Switch" : "Flat, –6 dB/octave below 115 Hz, or –18 dB/octave below 80 Hz", "Connector" : "Three-pin professional audio (XLR), male, balanced", "Polarity" : "Positive pressure on diaphragm produces positive voltage on pin 2 with respect to pin 3", "Power Requirements" : "11–52 V DC[4] phantom power (IEC-61938) 4.7 mA, maximum", "Net Weight" : "100 g (3.5  oz.)", "Notes" : [ "[1] 1 Pa=94 dB SPL", "[2]THD of microphone preamplifier when applied input signal level is equivalent to cartridge output at specified SPL", "[3]S/N ratio is the difference between 94 dB SPL and equivalent SPL of self noise, A-weighted", "[4]All specifications measured with a 48 Vdc phantom power supply. The microphone operates at lower voltages, but with slightly decreased headroom and sensitivity. " ] }

Research Materials for KSM137 (SHU-KSM137SLST)

We've added technical materials to help with your buying decision. Even if you're technically inclined, you may want to consider talking to our sales techs to make sure this item is the right fit for your particular use. 800.562.6006

KSM137 (SHU-KSM137SLST) Specifications

KSM137 (SHU-KSM137SLST) Brochure

KSM137 (SHU-KSM137SLST) User Guide

Read 2 reviews for the KSM137 Cardioid Instrument Microphone

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Jon Marx - Marx Music Studio
I love this mic on an acoustic piano or overhead choir mic. It has a smooth hi-mid bump that allows choir voices sound warm and natural without having to push gain too far.

Stephen Lund
I've used the KSM137's on drum overheads and various instruments. They have a fairly clean sound with lots of clarity and articulation. They have good transient and a nice full frequency response even though they are a mid size capsule.

I love using the X-Y mic mount as it gives you good stereo imaging while giving much more consistent phase for mono applications. So if you're recording in stereo, but feeding a mono house PA, it gives you a great compromise for both.

My only negative about them is that I think they (like most Shure KSM's) seem to have a very faint metallic ringing to their sound. It's very subtle, but if you've got a great speaker system you might notice it some.

Overall, these are definitely nice to have in you toolbox.