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CardioidRoswell Pro Audio Mini K47

Cardioid Condenser Microphone

The Mini K47 is a Cardioid condenser microphone that is “pre-modified” at the factory.

It uses a linear, transformerless circuit based on the Schoeps design. It delivers relatively high sensitivity (18mV/Pa) and low self-noise (13dBA).

The capsule is a K47 style, based on Neumann’s design. It is a true single-backplate capsule, with the characteristic K47 drilling pattern. The diaphragms are made of imported Mylar metallized with gold.

The input capacitor is an upgraded polystyrene type. The JFET is a selected low-capacitance K30A type, rather than the 2SK170 (high capacitance) model found in most condenser microphones. According to Roswell, the lower-capacitance JFET delivers superior performance within this circuit. Each JFET is manually biased at the factory to deliver maximum gain without distortion.

The main signal capacitors are Wima film types, imported from Germany.

The microphone’s DC circuit has been modified to improve the signal-to-noise ratio.

The body sleeve is made of heavy steel.

Each Mini K47 goes through a 7-point test/QC program, including a 24-hour burn-in, an acoustic frequency sweep, and tests for polarity, sensitivity, and noise. A serial numbered, signed QC card is included with each microphone.

The mic ships with a swivel mount and vinyl storage pouch. While the original production run of microphones in 2014-2015 did not include a shockmount, this was changed in 2016. Currently, every Mini K47 includes a metal-frame elastic shockmount (in addition to the swivel mount).

The company also matches pairs of this mic; the match criteria is 0.3dB in sensitivity, and 1.5dB in frequency response (50–15,000Hz).

Paul Vnuk, Recording Magazine

The Mini K47 is an impressive debut for Roswell Pro Audio. It is not just one of the best entry-level mics money can buy, it is also one of those workhorse mics that will find use in a mic locker forever, regardless of whatever other microphones one owns.

Mini K47The Mini K47 was rated “Outstanding” by Professional Audio magazine for its price-to-value ratio.

Permalink: Roswell Pro Audio Mini-K47

The mic was released in 2014.


Pickup Patterns Pads & Filters
Cardioid (18 mV/Pa; 20 - 16,000 Hz)
Capsule Dimensions Impedance SPL/Noise
Diaphragm diameter: 26mm
Capsule diameter: 34mm
Diaphragm gauge: 3 microns
200 Ohms (Low) Self-noise: 13.0 dB(A)
Weight Length Max Diameter Interface(s)
325g (11.46oz) 150mm (5.91'') 44mm (1.73'')
  • 3-pin XLR male (1)
Power Specifications
  • Requires phantom power

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