Quick Facts
David Clark M-7A amplified electret microphone for clear, noise-canceling transmission in compatible aviation headsets and flight helmet communication systems.
- Manufacturer: David Clark
- Model: M-7A
- Manufacturer Part Number: 09168P-33
- Microphone Type: Amplified electret
- Noise Canceling: Yes
- Power Requirement: Requires DC bias from a compatible communication circuit
- Product Includes: Microphone only
- Aviation Survival Part Number: AVS-2008
David Clark M-7A Microphone
The David Clark M-7A is an amplified electret, noise-canceling microphone engineered for clear, crisp voice transmission in demanding aviation and specialty communication environments. David Clark uses the M-7A across multiple aviation, fire-rescue, two-way communication, and special-aircrew headset systems.
This listing is for the replacement microphone element only. It is intended for an existing compatible M-7A installation where the microphone boom, electrical contacts, cord, headset or flight helmet wiring, and communication system are already properly configured.
Electrical Compatibility: The M-7A requires DC bias voltage from a compatible communication circuit. It is not a direct replacement for an unamplified military low-impedance microphone such as an M-87 or M-2.
Known David Clark Applications
David Clark identifies the M-7A as the microphone used in several headset models and product families, including:
| David Clark Model or Family | Typical Application |
|---|
| H10-60H | Passive helicopter aviation headset |
| H20-10 | Lightweight fixed-wing aviation headset |
| H3432 | Fire-rescue and high-noise communication headset |
| H3440 and H3442 | Behind-the-head fire-rescue and two-way communication headsets |
| H3492 | Single-ear specialty communication headset |
| Selected special-aircrew headsets | Mission and aircraft-specific communication systems |
The M-7A may also be installed in a flight helmet that has been professionally wired for a compatible amplified-electret communication system. A helmet brand alone does not establish compatibility.
Common Aviation and Public-Safety Applications
- Helicopter pilots using compatible civilian aviation communication systems
- Air ambulance, EMS, and medical-flight crews
- Law-enforcement and public-safety aviation units
- Utility, firefighting, tour, transport, and commercial helicopter operations
- Fixed-wing pilots using compatible David Clark aviation headsets
- Fire-rescue, emergency-response, and high-noise ground communications
- Flight helmet repair, refurbishment, and civilian communication-system upgrades
Is This the Correct Replacement?
This is the correct replacement when your existing microphone or David Clark parts list identifies:
Microphone model: M-7A
David Clark part number: 09168P-33
Do not substitute the M-7A for an M-7/DC, M-2, M-87, DC-87, or another microphone solely because the housing looks similar. The microphone model, electrical circuit, contacts, boom, and wiring must match the intended installation.
M-7A vs. M-7/DC: What Is the Difference?
The M-7A and M-7/DC are both David Clark noise-canceling electret microphones, but they are used in different headset and boom configurations.
| Feature | M-7A | M-7/DC |
|---|
| Microphone Type | Amplified electret, noise canceling | Electret, noise canceling |
| Typical Boom Style | Flex or flex-wire boom | Hinged wire boom |
| Common David Clark Applications | H10-13 series, H10-13H, H20-10, H10-60, H10-60H and selected specialty headsets | H10-30 and related traditional wire-boom headset configurations |
| David Clark Part Number | 09168P-33 | 09168P-31 |
Important: David Clark does not identify the M-7A and M-7/DC as universally interchangeable. Match the microphone to the boom, contacts, wiring, and headset or helmet configuration.
What Is Included?
- One David Clark M-7A microphone
- David Clark part number 09168P-33
The microphone boom, microphone cord, mount, protector, earphones, main communication cord, and installation are not included unless separately selected.
Installation and Positioning
Noise-canceling performance depends on correct microphone orientation and placement. Install the microphone with the speaking side facing the user and position it close to the mouth according to the headset or helmet configuration.
A qualified flight helmet or aviation communication technician should complete any installation requiring soldering, rewiring, contact replacement, boom modification, or conversion from a military low-impedance system.
Why Buy from Aviation Survival?
Aviation Survival works with complete flight helmet communication systems, not just individual headset parts. Our technicians repair and configure microphones, booms, earphones, cords, plugs, connectors, and helmet wiring for aviation and public-safety operations.
- Flight helmet microphone installation, wiring, and troubleshooting
- Support for EVO, Gentex, SPH, Alpha, MSA Gallet, and other aviation helmet systems
- Help matching the microphone, boom, cord, earphones, plug, and aircraft connection
- Repair and upgrade support for civilian, law-enforcement, EMS, utility, firefighting, and government aviation operations
- One source for replacement components and professional flight helmet service
Frequently Asked Questions
What type of microphone is the David Clark M-7A?
The M-7A is a noise-canceling amplified electret microphone used in compatible aviation, fire-rescue, two-way, and specialty communication headsets.
Which David Clark headsets use the M-7A?
Known applications include the H10-60H, H20-10, H3432, H3440, H3442, H3492, and selected specialty or special-aircrew headset configurations. Always use the parts list for the exact headset model.
Can the M-7A be used in a flight helmet?
Yes, when the flight helmet is equipped with a compatible M-7A boom, contacts, wiring, cord, and amplified-electret communication circuit. It is not a universal replacement for every helmet microphone.
Does the M-7A require power?
Yes. It requires DC bias supplied through a compatible communication circuit.
Is the M-7A interchangeable with the M-7/DC?
No. David Clark assigns the M-7A and M-7/DC different model and part numbers. Use the microphone identified by the headset parts list or existing installation.
Is the M-7A a low-impedance military microphone?
No. It is an amplified electret microphone and should not be substituted directly for an M-87, M-2, or other low-impedance dynamic microphone.
Which microphone protector fits the M-7A?
David Clark identifies microphone protector 40062G-02 for M-7A and M-55 microphone applications.
Can Aviation Survival install or troubleshoot this microphone?
Yes. Aviation Survival provides flight helmet communication repair, wiring, component installation, and troubleshooting. Contact us with the helmet or headset model and photographs of the existing microphone, boom, cord, and connector.
