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

• 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

  • 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

    • 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

      • Specifications:

        Cartridge Type

        Permanently Biased Condenser

         

        Frequency Response

        20­ to 20,000 Hz

         

        Directional Polar Pattern

        Cardioid

         

        Output Impedance

        150 ohms (actual)

         

        Attenuation Switch

        0 dB, 15 dB, or 25 dB attenuation

         

        Low Frequency Response Switch

        Flat; ­-6 db octave below 115 Hz;

        -­18 dB octave below 80 Hz

         

        Phantom Power

        48 Vdc + – 4 Vdc (IEC­268­15 DIN 45 596), positive pins 2 and 3

         

        Current Drain

        4.65 mA typical at 48 Vdc

         

        Common Mode Rejection

        >50 dB, 20 Hz to 20 kHz

         

        Polarity

        Positive pressure on diaphragm produces positive voltage on output pin 2 relative to pin 3

         

        Dimensions and Weight

        20 mm (0.8 in.) diameter, 122 mm (4.8 in.) long;

        100 grams (3.5 oz.)

         

        Sensitivity (typical, at 1000 Hz; 1 Pa = 94 dB SPL)

        ­-37 dBV Pa

         

        Self­noise (typical, equivalent SPL; A-weighted, IEC 651)

        14 dB

         

        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

         

        Output Clipping Level*

        5000 ohm load: 15 dBV

        2500 ohm load: 9 dBV

        1000 ohm load: 3 dBV

         

        Dynamic Range

        5000 ohm load: 131 dB

        2500 ohm load: 125 dB

        1000 ohm load: 120 dB

         

        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.