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Mojave MA-300:

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The MA-300 is a multi-pattern large diaphragm, vacuum tube condenser microphone. Based upon the widely accepted MA-200 designed by David Royer, the MA-300 adds a continuously variable pickup pattern selector, 15dB pad and a switchable bass roll-off. The MA-300 gives warm, full-bodied reproductions of vocals and instruments, with none of the shrillness and high frequency distortion artifacts that are often encountered with modern condenser microphones.

Utilizing hand-selected, double diaphragm 3-micron capsules, high-quality Jensen audio transformers and military-grade JAN 5840 vacuum tubes, the MA-300 performs at a level reminiscent of some of the best loved classic condenser microphones. The MA-300 power supply can be set for 115V and 230V, 50 or 60 Hz, through an internal switch (100V is also available). Each MA-300 microphone, power supply and cable set is burned in for 24 hours, carefully tested and evaluated, then packaged in its protective case-within-a-case.


  • Remotely controlled, continuously variable polar pattern selector
  • Switchable 15dB pad
  • Switchable Bass Roll-off
  • Hand-selected 3-micron double diaphragm capsule
  • Jensen audio transformer
  • Military grade JAN 5840 vacuum tube
  • Internal switchable power supply voltage
  • Ultra clean signal path

Recommended applications:

  • Use anywhere you would use an expensive, large diaphragm tube microphone
  • Vocals
  • Voice Over and Broadcast
  • Acoustic Instruments
  • Piano
  • Drum Overheads, Drum Rooms
  • Orchestral Recording
  • Choral Recording

Technical Data

  • Transducer Type:
    Externally polarized, pressure gradient capacitor - double diaphragm
  • Diaphragm:
    1-inch diameter, gold sputtered
  • Diaphragm Thickness:
  • Polar Response:
    Continuously variable from omnidirectional to figure-eight
  • Frequency Response:
    20 Hz to 20 KHZ, +/-3 dB at "flat" setting of bass cut switch
    Bass cut switch provides 6 dB per octave attenuation below 100 Hertz in "cut" setting
  • Sensitivity:
    -37dB re 1V/pa
  • Maximum SPL:
    120 dB with pad off, 135 dB with pad on
  • Distortion:
    < 1% @ 117 dB SPL
    < 3% @ 125 dB SPL with pad off
    < 1% @ 132 dB SPL
    < 3% @ 140 dB SPL with pad on
  • Self Noise:
    14db nominal, not to exceed 16db (A Weighted)
  • Pad:
    15 dB
  • Bass Cut:
    6 dB per octave below 100 hertz
  • Dimensions & Weight:
    Carrying case with microphone, power supply, shock mount and cables: 13 lbs.
    Microphone: 7 5/8" X 2", 1 lb.

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