SM Pro Audio MC03 Mk 2
Multi-Pattern Tube Condenser Microphone
The MC03 is a multipattern tube microphone with an innovative two-way amplifier circuit. The mic is powered by an included power supply, but when phantom power is enabled, a relay on the mic’s PCB switches to an alternate circuit, providing a second sound color.
According to the manufacturer, the non-phantom-power circuit is a neutral tone, whereas the alternative circuit provides a colored tone, in which the mids and highs are enhanced.
The tube is a 12AX7B, a high-gain dual-triode, sourced from a Chinese manufacturer. It is soldered, not socketed, into the amplifier circuit.
Curiously, the mic’s circuit board is stamped with an Alctron part number, HSGT-2B. But the switching amp circuit was designed by Australia’s JLM Audio, and apparently retrofitted onto the GT2B board.
The capsule is a K67 derivative, with a 32mm outside diameter and presumably a 25mm diaphragm. The backplate shows the distinctive K67 drilling pattern. The dual diaphragms are made of 6-micron gold-sputtered Mylar, and are center-terminated.
The mic ships in an aluminum flight case with an elastic shockmount, power supply, and cable.
The SM Pro Audio MC03 Mk 2 is also known as: MC03.
The mic was released in 2009.
Specifications
Pickup Patterns | Pads & Filters |
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Omnidirectional
(12 mV/Pa; 20 - 20,000 Hz) Cardioid (12 mV/Pa; 20 - 20,000 Hz) Bidirectional (12 mV/Pa; 20 - 20,000 Hz) |
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Capsule Dimensions | Impedance | SPL/Noise |
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Diaphragm diameter: 25mm Capsule diameter: 32mm Diaphragm gauge: 6 microns |
200 Ohms (Low) | Max SPL: 130 dB Self-noise: 18.0 dB(A) |
Weight | Length | Max Diameter | Interface(s) |
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n/a | 183mm (7.20'') | 71mm (2.80'') |
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Power Specifications |
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