Product Description
Overview
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\nThe 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.
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\nFeatures
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- Ultra-thin diaphragm for smooth high end and tight, controlled low end \n
- 15dB pad for performance consistency across a wider range of high SPL sources \n
- Low self-noise and transformerless preamplifier circuitry \n
Specifications
\nSM137 Condenser Microphone
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- Cartridge Type: Permanently Biased Condenser \n
- Frequency Response: 20 to 20,000Hz \n
- Directional Polar Pattern: Cardioid \n
- Output Impedance: 150? (actual) \n
- Attenuation Switch (0dB or 15dB attenuation) Phantom Power: 48 VDC ± 4 VDC, (IEC-268-15/DIN 45 596), positive pins 2 and 3 \n
- Current Drain: 5.2 mA typical at 48 VDC \n
- Common Mode Rejection: >50dB, 20Hz to 20kHz \n
- Polarity: Positive pressure on diaphragm produces positive voltage on output pin 2 relative to pin 3 \n
- Dimensions: 24mm (0.950") diameter, 162mm (6.375") long \n
- Weight: 195g (6.9oz..) \n
- Sensitivity (typical, at 1000Hz; 1 Pa = 94dB SPL): -41dBV/Pa \n
- Self-noise (typical, equivalent SPL; A-weighted (IEC 651)): 19dB \n
- Maximum SPL@ 1000Hz: \n
- 5000? load (Attenuator on): 150 (165dB) \n
- 2500? load (Attenuator on): 144 (159)dB \n
- 1000? load (Attenuator on): 139 (154dB) \n
- Output Clipping Level*: \n
- 5000? load: 15dBV \n
- 2500? load: 9dBV> \n
- 1000? load: 3dBV \n
- *20Hz to 20kHz; THD < 1%. THD of the microphone preamplifier when applied input signal is equivalent to the cartridge output at specified SPL. \nDynamic Range (Attenuator On): \n
- 5000? load: 133 (136)dB \n
- 2500? load: 128 (130dB) \n
- 1000? load: 122 (125)dB \n
- Signal to Noise Ratio** \n
- 75dB \n
- **S/N ratio is difference between 94dB SPL and equivalent SPL of self-noise A-weighted \n
Pro Coverage
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\nManufacturer's Warranty
\nOne year warranty on wireless mics, mixers, and circuitry products.
\n2 year warranty on wired mics.
\nWarranty terms vary. Check with manufacturer for specific product warranty.
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