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Shure KSM137 Cardioid Instrument Microphone
Expected June 30, 2025
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The KSM137 is a premium end-address condenser microphone with a single cardioid polar pattern engineered for highly critical studio recording and live sound productions. 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.
Its class A, discrete, transformerless preamplifier provides extremely natural response and transparent sound capture, and a three position switchable pad allows for handling of extremely high sound pressure levels. Versatile, durable, and precise, the KSM137 is an outstanding microphone for instruments ranging from percussion to wind, strings to brass, and piano to guitar.
Applications:
Guitar Amp
Stereo Recording
Piano/Organ
Acoustic String Instruments
Brass/Woodwinds
Drums / Percussion
Recording
Microphone Type:
Condenser
Polar Pattern:
Cardioid
Frequency Response:
Flat
Form Factor:
End-Address
Model Line:
KSM
Shure KSM137 Cardioid Instrument Microphone Features:
- 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.
- Switchable 15 dB pad for handling extremely high sound pressure levels (SPLs.)
- 3-position switchable pad (0 dB, 15 dB, and 25 dB) for handling extremely high sound pressure levels (SPLs.)
- 3-position switchable low-frequency filter reduces background noise and counteracts proximity effect.
- Extended frequency response.
- Exceptional reproduction of low-frequency sounds.
- Can withstand high sound pressure levels (SPL.)
- Superior common mode rejection and suppression of radio frequency interference.
- Acoustic instruments - such as 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.
Shure KSM137 Specifications:
| Frequency Response | 20 to 20,000 Hz |
| Polar Pattern | Cardioid |
| Cartridge Type | Electret Condenser |
| Sensitivity (Open circuit voltage, @ 1 kHz, typical) | -37 dBV/Pa (14.1 mV) 1 Pa = 94 dB SPL |
| Maximum SPL (1 kHz @ 1% THD) | No Pad: 145 dB 139 dB 134 dB -25 dB Pad: 170 dB 164 dB 159 dB |
| Signal-to-noise ratio (A-weighted) | 80 dB |
| Dynamic Range (@ 1 kHz) | 5000 ohms load: 131 dB 2500 ohms load: 125 dB 1000 ohms load: 120 dB |
| Clipping Level (20 Hz - 20 kHz, 1% THD) | 5000 ohms load: 15 dBV 2500 ohms load: 9 dBV 1000 ohms load: 3 dBV |
| Self Noise (equivalent SPL, A-weighted, typical) | 14 dB |
| Common Mode Rejection (10 to 100,000 Hz) | ≥50 dB |
| Switch | Attenuator: 0, −15, −25 dB Low Frequency Filter: flat; -6 dB/octave below 115 Hz; -18 dB/octave below 80 Hz |
| Polarity | Positive pressure on diaphragm produces positive voltage on pin 2 with respect to pin 3. |
| Net Weight | 0.22 lbs. / 100 g (3.5 oz.) |
| Connector | Three-pin Professional Audio (XLR), male, balanced. |
| Power Requirements | 11-52 VDC phantom power (IEC-61938) 4.7 mA, maximum |
Each KSM137 Retail Box Includes:
(1) Shure KSM137 Cardioid Instrument Microphone
(1) Foam windscreen
(1) Carry case