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Shure SM137-LC - Cardioid Condenser Instrument Microphone

 
  • Dale #:

    SHUR-SM137LC
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Description

The SM137 is a versatile, flat-response cardioid condenser probe microphone. The SM137 has 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 a... Read More

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Description

The SM137 is a versatile, flat-response cardioid condenser probe microphone. The SM137 has 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:

  • Cardioid polar pattern to reduce the pickup of unwanted sounds
  • 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
  • Two-position switchable pad (0 dB and 15 dB) for handling extremely high sound pressure levels (SPLs)

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Product Specs

Type Electret Condenser
Frequency Response20 to 20,000 Hz
Polar PatternCardioid
Output Impedance150 ohms actual
Sensitivity (at 1 kHz, open circuit voltage)

-41 dBV/Pa (1 Pascal=94 dB SPL)

Maximum SPL (1 kHz at 1% THD)

1000 ohms load: 139 dB (154 dB, Pad on) / 2500 ohms load: 144 dB (159 dB, Pad on)

Signal-to-Noise Ratio (referenced at 94 dB SPL at 1 kHz)75 dB (S/N ratio is difference between 94 dB SPL and equivalent SPL of self noise, A-weighted)
Dynamic Range (at 1 kHz)

1000 ohms load: 122 dB / 2500 ohms load: 128 dB

Common Mode Rejection (20 Hz to 20 kHz)

> 50 dB
Clipping Level (20Hz-20 kHz at 1%THD)

1000 ohms load: 3 dBV / 2500 ohms load: 9 dBV (THD of microphone preamplifier when applied input signal is equivalent to cartridge output at specified SPL)

Self Noise (typical, equivalent SPL, A-weighted)19 dB
Polarity

Positive pressure on diaphragm produces positive voltage on pin 2 with respect to pin 3

WeightNet: 195 g (6.9 oz.)
SwitchAttenuator: -15 dB
Connector Three-pin professional audio (XLR), male
Power Requirements48 Vdc phantom, 5.2 mA

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