David Clark Electret Mic M - 7A

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Part# 11-04041
MFR Model# 09168P-33


The Model M-7A is an Electret, noise-cancelling microphone designed to operate in place of carbon and amplified dynamic microphones. Provides clear, crisp voice transmission. It will not operate in circuits that do not supply a DC bias voltage. Most modern aviation communications equipment do supply this required voltage. If unsure, consult with your radio technical manual or with your local avionics shop.

The microphone is designed and constructed from quality durable high strength ABS plastic as well as corrosion resistant metals meeting or exceeding the environmental, durability and interchangeability requirements of RTCA/DO-214.

Fits all of David Clark Electret FLEX Boom Style Headsets


  • Noise cancelling up to 25 db
  • Replacement for David Clark Mic M-7A and M4
  • Field Replacable
  • Fits Flex Style Booms


  • Color: Lusterless Black
  • Weight: Approximately 4.5 to 6.0 grams
  • Impedance: 150 ohms + / - 20 ohms
  • Distortion: 6% @ 114dB
  • Frequency response: 100Hz to 10,000Hz
  • Sensitivity at ground level: 86dB - 98dB @ 1.0 kHz / 94dB input
  • Temperature range: -55C to +85C
  • Noise canceling: Min 15dB Max 25dB
  • Altitude compensation: 25,000ft
  • Supply voltage: 9-28V dc


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Brand new, fitted and all is just fine ..

James A Verified Purchase


January 18, 2022

Perfect replacement part. Works great.

James B Verified Purchase


July 13, 2021

Part was well packaged and worked wonderfully. Will be purchasing from aircraft spruce again.

August 2, 2020

Item arrived in very good time and replaced the defective mike in the head set perfectly. Very small screws so dont drop them....... :-)

July 27, 2020

I received the part quickly and it give a second life to my headset. Just perfect.

March 15, 2019


Please note, Aircraft Spruce's personnel are not certified aircraft mechanics and can only provide general support and ideas, which should not be relied upon or implemented in lieu of consulting an A&P or other qualified technician. Aircraft Spruce assumes no responsibility or liability for any issue or problem which may arise from any repair, modification or other work done from this knowledge base. Any product eligibility information provided here is based on general application guides and we recommend always referring to your specific aircraft parts manual, the parts manufacturer or consulting with a qualified mechanic.

Q: Hello, I have a headset with a M4 mic, would the David Clark Electret MIC M-7A be compatible?

The David Clark Electret MIC M-7A is a suitable replacement for David Clark Mic M-7A and M4 Microphones.

Q: This microphone doesn't appear to have the same mounting brackets as the M4 microphone. How is it mounted on the headset?

This microphone is designed for the M-7. For the M-4, please see part number 11-06558.

Q: Is the M-7A mic the right part for a H10-13S David Clark headset?

Yes, per David Clark the M-7A microphone is appropriate for the H10-13S headset.

Q: Does the David Clark M-7A mic come with its screws?

The set screws are already inserted in the mic. There is also an allen wrench included.

Q: Is the M-7A mic the right part for a H10-76 David Clark headset?

The H10-76 is a low impedance headset and uses the M-87 mic for low impedance.

The M-7A mic can be used with the H10-76 but is a high impedance mic for Civilian radio systems.

Q: Can it be used to convert an H10-30 to electret noise canceling microphone?

No, this will not convert the headset to ANR.