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OmnidirectionalCardioidHypercardioidCharterOak Acoustic Devices M900

Detachable-Capsule Pencil Condenser Microphone

The M900 is a small-diaphragm condenser mic with three detachable capsules, providing omni, cardioid, and hypercardioid pickup patterns. The preamp body is equipped with a 3-position pad (flat, -10dB, -20dB) and 3-position filter.

Although the capsules are visually similar to those used on the tube version of this mic (the M900T), the capsules are not interchangeable across the two head amps; the various capsules are sourced from different manufacturers, and in some cases require different polarization voltages.

The output circuit is transformerless. The M900 is the only transformerless microphone in CharterOak’s product line, as of late 2010.

The mic has a lifetime warranty on all parts and labor.

The CharterOak Acoustic Devices M900 is also known as: M-900.

Specifications

Compatible Capsules
CharterOak Acoustic Devices S-5Cardioid CharterOak Acoustic Devices S-5
20mm Cardioid capsule
Sensitivity: 10 mV/Pa
Freq. Resp.: 30 - 20,000 Hz
MSRP: n/a | Still In Production
CharterOak Acoustic Devices S-6Hypercardioid CharterOak Acoustic Devices S-6
20mm Hypercardioid capsule
Sensitivity: 10 mV/Pa
Freq. Resp.: 30 - 20,000 Hz
MSRP: n/a | Still In Production
CharterOak Acoustic Devices S-7Omnidirectional CharterOak Acoustic Devices S-7
20mm Omnidirectional capsule
Sensitivity: 10 mV/Pa
Freq. Resp.: 30 - 20,000 Hz
MSRP: n/a | Still In Production
Pads & Filters Impedance SPL/Noise
  • Pad: -10dB (Via Switch)
  • Pad: -20dB (Via Switch)
  • Filter: HPF: -3dB @ 150 Hz (Via Switch)
  • Filter: HPF: -6dB @ 75Hz (Via Switch)
200 Ohms (Low) Max SPL: 137 dB
Weight Length Max Diameter Interface(s)
n/a n/a n/a
  • 3-pin XLR male (1)
Power Specifications
  • Requires phantom power
  • Phantom voltage: 48v

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