SHURE Pro Audio Equipment - Recording Microphone SM137 Condenser Instrument Microphone

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

Specifications

Cartridge Type : Permanently Biased Condenser
Directional Polar Pattern : Cardioid
Output Impedance : 150 ohms (actual)
Attenuation Switch : 0 dB or 15 dB attenuation
Phantom Power : 48 Vdc +/- 4 Vdc (IEC26815/DIN 45 596), positive pins 2 and 3
Current Drain : 5.2 mA typical at 48 Vdc
Common Mode Rejection : >50 dB, 20 Hz to 20 kHz
Polarity : Positive pressure on diaphragm produces positive voltage on output pin 2 relative to pin 3
Dimensions and Weight
24 mm (0.950 in.) diameter
162 mm (6.375 in.) long
195 grams (6.9 oz.)
Sensitivity (typical, at 1000 Hz; 1 Pa = 94 dB SPL) : -41 dBV/Pa
Selfnoise (typical, equivalent SPL; A-weighted (IEC 651)) : 19 dB
Maximum SPL@ 1000 Hz
5000 ohms load (Attenuator on): 150 (165 dB)
2500 ohms load (Attenuator on): 144 (159) dB
1000 ohms load (Attenuator on): 139 (154 dB)
Output Clipping Level*
5000 ohms load: 15 dBV
2500 ohms load: 9 dBV
1000 ohms load: 3 dBV
Dynamic Range (Attenuator On)
5000 ohms load: 133 (136) dB
2500 ohms load: 128 (130 dB)
1000 ohms load: 122 (125) dB
Signal to Noise Ratio** : 75 dB

*20 Hz to 20 kHz; THD < 1%. THD of the microphone preamplifier when applied input signal is equivalent to the cartridge output at specified SPL.
**S/N ratio is difference between 94 dB SPL and equivalent SPL of self-noise A-weighted

SHURE SM137 Condenser Instrument Recording Microphones

SHURE
SM137 Condenser Instrument Recording Microphones