Versatile, durable, and precise, the KSM137 is an outstanding microphone for instruments ranging from percussion to wind, strings to brass, and piano to guitar.
Performance Characteristics
- 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
Common Applications
- Acoustic instruments: 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
- Cartridge type: Permanently biased condenser
- Frequency response: 20 to 20,000Hz
- Directional polar pattern: Cardioid
- Output impedance: 150 ? (actual)
- Attenuation Switch
- 0dB, 15dB, or 25dB attenuation
- Low-frequency response switch: Flat; -6 db/octave below 115Hz
- -18dB/octave below 80Hz
- Phantom power: 48 Vdc ± 4 Vdc (IEC-268-15/DIN 45 596), positive pins 2 and 3
- Current drain: 4.65mA 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 and weight: 20mm (0.8″) diameter, 122mm (4.8″) long
- 100g (3.5oz.)
- Sensitivity (typical, at 1000Hz; 1 Pa = 94dB SPL): -37dBV/Pa
- Self-noise (typical, equivalent SPL; A-weighted, IEC 651): 14dB
- Maximum SPL at 1kHz:
- 5000? load (Attenuator on): 145 (160, 170)dB
- 2500? load (Attenuator on): 139 (154, 164)dB
- 1000? load (Attenuator on): 134 (149, 159)dB
- 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: - 5000? load: 131dB
- 2500? load: 125dB
- 1000? load: 120dB
- Signal-to-Noise Ratio**: 80dB
- **S/N ratio is difference between 94dB SPL and equivalent SPL of self noise A-weighted


















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