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Mojave MA-100:

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The MA-100 is a small diaphragm, vacuum tube condenser microphone with interchangeable cardioid and omnidirectional capsules. The latest in a lineage of successful microphone designs by David Royer, the MA-100's 'cathode follower' design allows you to use the MA-100 on high SPL instruments such as drums and guitar amplifiers, as well as the more common applications of a small diaphragm, vacuum tube condenser microphone, such as acoustic instruments, cymbals, stereo pairs and pianos.

Featuring hand selected 3 micron capsules, high quality Jensen audio transformers and military-grade JAN 5840 vacuum tubes, the MA-100 performs at a level reminiscent of some of the best loved classic small diaphragm tube condenser microphones. The MA-100 power supply can be set for either 115v or 230v via an external switch. Each MA-100 microphone, power supply and cable set is burned in for 24 hours, carefully tested and evaluated, then packaged in its protective case.

Small Diaphragm - Big Sound!

Why choose a small diaphragm microphone?
Because small diaphragm microphones offer some distinct advantages over their larger brethren such as:

  • More consistent polar pattern
  • Better transient response
  • Ease of placement

Why choose an MA-100?

  • Extended low-frequency response
  • High SPL handling capability - try putting your large-diaphragm mic on a snare drum!


  • Interchangeable cardioid and omnidirectional capsules
  • Hand-selected 3-micron capsules
  • Jensen audio transformer
  • Military grade JAN 5840 vacuum tube
  • External switchable power supply voltage
  • Ultra clean signal path
  • High SPL handling capability

Recommended applications:

  • Acoustic Instruments
  • Drums
  • Guitar Amplifiers
  • Piano
  • Stereo Pairs (X/Y, MS, etc.)
  • Decca Tree
  • Orchestral Recording
  • Choral Recording
  • Voice-overs and Broadcast
  • Percussion

Technical Data

  • Transducer Type:
    Externally excited capacitor type
  • Diaphragm:
    .8" / 20.5 mm diameter
  • Diaphragm Thickness:
    3 microns
  • Polar Response:
    Interchangeable Cardioid and Omnidirectional Capsules
  • Frequency Response:
    20 Hz - 20 kHz, +/-3dB
  • Sensitivity:
    -37dB re 1V/pa
  • Maximum SPL:
  • Distortion:
    Head amp only, not to exceed .4% @ 140 dB SPL
  • Self Noise:
    Not to exceed 16dB
  • Impedance:
    450 ohms, transformer balanced
  • Vacuum Tube:
    5840 pentode wired as triode, operated as a unity-gain buffer stage (cathode follower)
  • Power Requirements:
    100-120VAC; 220-240VAC, 50 or 60 Hz
    Power consumption approx. 10 watts
  • Dimensions & Weight:
    Carrying case with microphone, power supply, shock mount and cables: 7 lbs.
  • Carrying Case:
    14" x 11" x 4"
  • Microphone:
    5.5" x .75"
    Weight .4lbs

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