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continuously variable pattern selectionMojave Audio MA-300

Multi-Pattern Tube Condenser Microphone

The MA-300 is a multipattern tube condenser — essentially, a multipattern version of the MA-200.

The two mics share a capsule, body, and basic amplifier circuit design.

David Royer

I wanted it to sound as close to the MA-200 as I could get.

The capsule is a Chinese-made K67-type. The dual diaphragms measure 25mm in diameter and are made of 3-micron Mylar, sputtered with gold. The capsule is center-terminated, has dual backplates, and a rising frequency response (as is characteristic of K67 capsules).

The plate-loaded tube amplifier circuit uses a subminiature 5840 military-spec vacuum tube. The output transformer is from Jensen.

MA-300The mic body and grille are identical to the MA-200. The only external physical differences between these mics are the model name on the body, and the Cardioid symbol on the headbasket ring of the MA-200.

The headbasket of both mics slopes in at the top of the grille, to reduce the opportunity for standing waves that could cause undesirable coloration.

The MA-300 provides options created in response to user feedback about the MA-200:

  • The MA-300 has a -15dB pad.
  • The MA-300 has a high-pass filter.

The MA-300 was introduced at the AES show in San Francisco in November, 2010.

The mic ships with its dual-voltage (115V/230V, 50/60Hz)power supply, a 16-foot 7-pin cable, an elastic shockmount, and an aluminum flight case.

Permalink: Mojave Audio MA-300

The mic was released in 2010.


Pickup Patterns Pads & Filters
Omnidirectional (14.1 mV/Pa; 30 - 18,000 Hz)
Cardioid (14.1 mV/Pa; 30 - 18,000 Hz)
Bidirectional (14.1 mV/Pa; 30 - 18,000 Hz)
  • Pad: -15dB (Via Switch)
  • Filter: HPF (Via Switch)
Capsule Dimensions Impedance SPL/Noise
Diaphragm diameter: 26mm
Capsule diameter: 32mm
Diaphragm gauge: 3 microns
200 Ohms (Low) Max SPL: 132 dB
Self-noise: 16.0 dB(A)
Weight Length Max Diameter Interface(s)
n/a 194mm (7.64'') 51mm (2.01'')
  • 3-pin XLR male (1)
Power Specifications
  • Includes tube power supply

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