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David Clark M-7A Amplified Electret Microphone | 09168P-33
The M-7A is one of the most sophisticated noise-canceling microphones available. You can use it to replace carbon and amplified, dynamic microphones. It's everything you've come to expect from David Clark equipment.
The M-7A requires DC bias voltage. While this type of voltage is supplied by most modern aviation communications equipment, consult your radio technical manual or avionics shop for more information. Additionally, we recommend that the radio master gain control be adjusted by a trained avionics technician so that it adheres to current radio standards.