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OmnidirectionalCardioidHypercardioidCharterOak Acoustic Devices M900T

MSRP: $1,299 Detachable-Capsule Pencil Condenser Tube Microphone

CharterOak Acoustic Devices M900T

Description

The M900T is a small-diaphragm tube mic with three interchangeable capsules. Like all CharterOak mics, it is built by hand in the US using parts sourced around the world.

The printed circuit boards are sourced from China, unpopulated. CharterOak technicians in Connecticut populate the PCBs with their hand-selected components.

Similarly, metal parts and casings are sourced from Asia, to be assembled, finished, plated, etc., in the US.

The mic’s 6J1B-Q tube is subminiature style, wired in place. (There is no room on the board for a socket.) It is a premium version of the 6J1B tube (which turns up in other microphones). According to Michael Deming, the -Q version “exhibit[s] a lower noise floor and better all-around sound and performance.”

The mic will ship with a dedicated power supply and cable, 3 interchangeable capsules, mic clip, and shock mount in a metal flight case. Also included is a lifetime warranty on all parts and labor.

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The mic was released in 2008.

Compatible Capsules
Cardioid CharterOak Acoustic Devices S-5 (tube)
  • 20mm Cardioid capsule
  • Sensitivity: 20 mV/Pa
  • Freq. Resp.: 25 - 20,000 Hz
  • MSRP: n/a | Still In Production
Hypercardioid CharterOak Acoustic Devices S-6 (tube)
  • 20mm Hypercardioid capsule
  • Sensitivity: 20 mV/Pa
  • Freq. Resp.: 25 - 20,000 Hz
  • MSRP: n/a | Still In Production
Omnidirectional CharterOak Acoustic Devices S-7 (tube)
  • 20mm Omnidirectional capsule
  • Sensitivity: 20 mV/Pa
  • Freq. Resp.: 25 - 20,000 Hz
  • MSRP: n/a | Still In Production
Pads & Filters Impedance Max SPL
  • Pad: -15dB (Via Switch)
  • Filter: HPF: -6dB @ 75Hz (Via Switch)
 200 Ohms (Low (50-1000 Ohms)) 138 dB
Weight Length Max Diameter Interface(s)
n/a n/a n/a
  • 3-pin XLR male (1)
Power Specifications
  • Requires External Power Supply

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