Description
The KSM137 is an end-address condenser microphone with a single cardioid polar pattern. Designed for studio use, yet rugged enough for live applications, the KSM137 can withstand extremely high sound pressure levels (SPL). Its low self-noise and extended frequency response make it ideal for recording instruments.
Versatile, durable, and precise, the KSM137 is an outstanding microphone for instruments ranging from percussion to wind, strings to brass, and piano to guitar.
- 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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