MP-47 Microphone

$ 569.00

The MP47 has been discontinued; we will introduce an upgraded and improved model in December, with 3 polar patterns and a switchable pad.

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The MP47 is a large-diaphragm condenser microphone built by hand in the US. We use a highly optimized transformerless circuit and a K47-style capsule. An internal switch (mounted on the circuit board) allows switching between Cardioid and Omni polar patterns.

The microphone has high sensitivity, very low distortion, and low self-noise. They're fantastic for voiceover, sung vocals, strings, and woodwinds. We don't recommend this mic for high SPL applications such as kick drum and brass, although we can build a high-SPL version of this mic upon request.

The MP47 ships with a swivel mount, an elastic shockmount, and a hard plastic storage case.


Acoustic Operating Principle Pressure-gradient transducer
Capsule K47-style true condenser, single backplate, 34mm O.D.
Diaphragms 3-micron Mylar, center-terminated
Directional pattern Cardioid/Omni switchable (internal switch, on PCB)
Frequency range 10 - 15,000 Hz
Sensitivity 30 mV/Pa
Impedance 112 Ohm
Signal-to-Noise ratio 84dB (A)
Self-noise 10-12dBA
Supply voltage 48±4 VDC
Output connector XLR3M

Origins and Components

The circuit is our highly optimized version of the transformerless design pioneered by Schoeps. We manufacture and populate the circuit boards in the US, using the finest components available: 1% Vishay Dale resistors, long-life Panasonic and Wima capacitors, vintage ("NOS") transistors from Siliconix and Toshiba.

The capsule is our RK-47, our all-brass K47-style capsule. This is a 34mm O.D., single-backplate capsule modeled after Neumann's famous K47 (found in the U47 tube microphone). We use 3-micron Japanese Mylar for the diaphragms, which are metallized with pure gold.

The headbasket is a tapered design that we modeled after the Neumann M49/M50 grille. We make it with 2 layers of mesh, as that gives the best compromise between sonic transparency and blast/EMI/RFI protection.

The microphone body is finished with a tough, textured black powdercoat.

All these great parts come together to create a slick-looking, very sensitive (~30mV/Pa), very low-noise (~10dBA) studio microphone with classic K47 tone: great midrange detail, without the hyped top end that is so common on inexpensive condensers.

In the Box

The MP47 ships with a swivel mount, a metal-frame elastic shockmount, and a padded plastic suitcase (which says "MXL" on it). The mic is warrantied against defects for 90 days.


These microphones are stocked in the US warehouse only. They can be shipped worldwide.

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