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KSM137 Cardioid Instrument
Microphone |
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Product Code:
KSM137
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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 musical 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.
- KSM137/SL with foam windscreen and carrying case, champagne
finish
- KSM137/SL ST PAIR with two KSM137/SL Mics, two windscreens, one
carrying case, champagne finish
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Features
- A 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)
- Three-position switchable pad (0 dB, 15 dB, and 25 dB) for
handling extremely high sound pressure levels (SPLs)
- Three-position switchable low-frequency filter reduces
background noise and counteracts proximity effect
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Performance
Characteristics
- Extended frequency
response
- Low self noise
- Exceptional reproduction of
low-frequency sounds
- Can withstand high sound
pressure levels (SPL)
- High output
level
- No crossover
distortion
- Uniform polar
response
- Superior common mode rejection
and suppression of radio frequency interference
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Applications
Some typical applications for the KSM137 are listed below.
Microphone use is a matter of personal taste and the KSM137 may be
used for a variety of applications other than those
listed.
- 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
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| Specifications |
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Cartridge Type: Permanently Biased
Condenser
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Frequency Response : 20 to 20,000
Hz
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Directional Polar Pattern:
Cardioid
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Output Impedance :150 ohms
(actual)
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Attenuation Switch :0 dB, 15 dB, or 25 dB
attenuation
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Low Frequency Response Switch
Flat; -6 db/octave below 115 Hz;
-18 dB/octave below 80 Hz
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Phantom Power : 48 Vdc +/- 4 Vdc
(IEC26815/DIN 45 596), positive pins 2 and
3
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Current Drain : 4.65 mA typical at 48
Vdc
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Common Mode Rejection : >50 dB, 20 Hz
to 20 kHz
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Polarity : Positive pressure on diaphragm
produces positive voltage on output pin 2 relative to pin
3
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Dimensions and Weight : 20 mm (0.8 in.)
diameter, 122 mm (4.8 in.) long; 100 grams (3.5
oz.)
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Sensitivity (typical, at 1000 Hz; 1 Pa =
94 dB SPL) -37 dBV/Pa
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Selfnoise (typical, equivalent SPL;
A-weighted, IEC 651) 14 dB
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Maximum SPL at 1 kHz
5000 ohm load (Attenuator on): 145 (160, 170) dB
2500 ohm load (Attenuator on): 139 (154, 164) dB
1000 ohm load (Attenuator on): 134 (149, 159)
dB
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Output Clipping Level*
5000 ohm load: 15 dBV
2500 ohm load: 9 dBV
1000 ohm load: 3 dBV
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Dynamic Range
5000 ohm load: 131 dB
2500 ohm load: 125 dB
1000 ohm load: 120 dB
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Signal to Noise Ratio** : 80 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.
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