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. Includes foam windscreen, carry case, champagne finish.
Features
- Highly consistent cardioid polar pattern
- 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
- Subsonic filter eliminates low frequency rumble (less than 17 Hz) caused by mechanical vibration
- Switchable 15 dB pad for handling extremely high sound pressure levels (SPLs)
- 3-position switchable pad (0 dB, 15 dB, and 25 dB) for handling extremely high sound pressure levels (SPLs)
- 3-position switchable low-frequency filter reduces background noise and counteracts proximity effect
- 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 -- such as 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
Specifications
Cartridge Type Electret Condenser
Frequency Response 20 to 20,000 Hz
Output Impedance 150 ohms
Sensitivity (at 1kHz, open circuit voltage) −37 dBV/Pa
1 Pascal=94 dB SPL
Power Requirements 48 Vdc phantom. 4.7 mA
Common Mode Rejection >50 dB, 10 Hz to 100 kHz
Polarity Positive pressure on front diaphragm produces positive voltage on output pin 2 relative to pin 3
Polar Pattern Cardioid
Self-noise (typical, equivalent SPL; A-weighted) 14 dB
Maximum SPL
1000 ohms load: 134 dB (159 dB, -25 Pad)
2500 ohms load: 139 dB (164 dB, -25 Pad)
5000 ohms load: 145 dB (170 dB, -25 Pad)
Clipping Level (20Hz-20 kHz at 1% THD)
1000 ohms load: 3 dBV
2500 ohms load: 9 dBV
5000 ohms load: 15 dBV
Dynamic Range (at 1 kHz)
1000 ohms load: 120 dB
2500 ohms load: 125 dB
5000 ohms load: 131 dB
Signal to Noise ratio 80 dB
(referenced at 94 dB SPL at 1 kHz)
Weight Net: 100 g (3.5 oz.)
