Mojave Audio MA-37

The Mojave MA-37 features an EF86 tube, Lundahl transformer and a special capsule built in California. It features a unique mechanical approach, developed by RCA in the 1930s and adapted by Sony, to achieving a choice between cardioid and omnidirectional polar pattens – an adjustable tuned acoustic chamber.

In keeping with David Royer’s “simple yet elegant” design philosophy, the circuit is based around a single-stage tube amplifer. The hi-pass fllter controls are located on the power supply, offering three options:  at (M), 100Hz (V1) and 200Hz (V2).

The Mojave MA-37 – it sounds great – in a di erent way!

Specifications

• CAPSULE TYPE: Single diaphragm
• POLAR PATTERN: Choice of cardioid or omni; via mechanical shutter
• FREQUENCY RESPONSE: 30 to 18,000 Hz. ±3 dB ("M" setting)
• SENSITIVITY: -46 dBv referred to 1 volt per pa.
• MAXIMUM SPL: 120 dB with pad off, 135 dB with pad on.
• DISTORTION: Not to exceed .5 percent at 134 dB
• SELF NOISE: Better than 18 dB

BASS CUT

• M flat
• V1 -6dB at 40 Hz.
• V2 -6dB at 100 Hz.

IMPEDANCE: 170 ohms, floating.
Recommended load 1500 ohms or higher

POWER REQUIREMENT

• 115 or 230 VAC, 50 or 60 hertz; 5 watts.
• 6 volts DC at 200 mA.
• 140 volts DC at 1.5 mA. from dedicated power supply

DIMENSIONS AND WEIGHT

• Microphone – 6”x2” 1lb.
• Power Supply – 9.5”x7.25”x4.5” 5.5lb
• Case – 18.5’x13.5”x7” 16lbs