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Shure SM137 Condenser Instrument Microphone  

Sku #580998000000000

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A versatile, flat-response mic for acoustic and high volume performance applications.

The SM137 is a versatile, flat-response cardioid condenser probe microphone with an ultra-thin diaphragm for a frequency response that combines a smooth high-end with a tight, controlled low-end and a 15db pad for natural sound reproduction in both acoustic and high-volume performance applications.

FEATURES
Ultra-thin diaphragm for smooth high end and tight, controlled low end
15dB pad for performance consistency across a wider range of high SPL sources
Low self-noise and transformerless preamplifier circuitry

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SM137 Condenser Instrument Microphone Specifications:

SM137 Condenser Microphone
Cartridge Type: Permanently Biased Condenser
Frequency Response: 20 to 20,000Hz
Directional Polar Pattern: Cardioid
Output Impedance: 150? (actual)
Attenuation Switch (0dB or 15dB attenuation) Phantom Power: 48 VDC ± 4 VDC, (IEC-268-15/DIN 45 596), positive pins 2 and 3
Current Drain: 5.2 mA typical at 48 VDC
Common Mode Rejection: >50dB, 20Hz to 20kHz
Polarity: Positive pressure on diaphragm produces positive voltage on output pin 2 relative to pin 3
Dimensions: 24mm (0.950") diameter, 162mm (6.375") long
Weight: 195g (6.9oz..)
Sensitivity (typical, at 1000Hz; 1 Pa = 94dB SPL): -41dBV/Pa
Self-noise (typical, equivalent SPL; A-weighted (IEC 651)): 19dB
Maximum SPL@ 1000Hz:
5000? load (Attenuator on): 150 (165dB)
2500? load (Attenuator on): 144 (159)dB
1000? load (Attenuator on): 139 (154dB)
Output Clipping Level*:
5000? load: 15dBV
2500? load: 9dBV>
1000? load: 3dBV
*20Hz to 20kHz; THD < 1%. THD of the microphone preamplifier when applied input signal is equivalent to the cartridge output at specified SPL.
Dynamic Range (Attenuator On):
5000? load: 133 (136)dB
2500? load: 128 (130dB)
1000? load: 122 (125)dB
Signal to Noise Ratio**
75dB
**S/N ratio is difference between 94dB SPL and equivalent SPL of self-noise A-weighted
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