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RTS Telex

Airman 850

Lightweight ANR headset, no batteries or panel power needed

Sound Quality

At just 4 oz., the Airman 850 is the lightest ANR product in the marketplace. Wind noise and ambient noise is reduced by up to 12 decibels (dB) of. The headset also features a noise-cancelling electret microphone.

Comfort and Fit

An adjustable headband gives the wearer two inches of up and down earphone adjustment per side, while gimbal mounting improves the headset's side-to-side comfort. The ear cups and cushions have been enlarged from previous models to enhance pilot comfort.


The Airman 850 features a miniature, amplified, noise-cancelling electret microphone that provides superior 400Hz hum rejection. The flexible boom rotates 320° and can be worn on either side of the head. A replaceable windscreen is included to minimize popping, hissing, and breathing sounds when speaking.


The Airman 850 contains an On/Off switch to control ANR power and a Hi/Low switch for controlling receiver volume.

Cordage and Plugs

The microphone cordage is protected inside the boom. A strain relief on the cord provides maximum durability. Shielded wire throughout the headset protects against RFI and EMI.

Versions Available

The Airman 850 is available in single-sided and dual-sided configurations.

FAA TSO Approval

The Airman 850 headset is approved for aircraft use under FAA TSO's C57a and C58a.
Boom Flexible Boom
Color Black
Cord Length 5.58 ft (1.7 m)
Ear Seals Plush foam
FAA TSO Approvals C57a and C58a
Frequency Response 350-15000 Hz
Impedance 150 +/- 20% Ω
Microphone Frequency Response 300-6000 Hz
Microphone Impedance 50-600 Ω
Microphone Sensitivity -51 +/- 3 dB dBV/Pa
Microphone Type Noise-Cancelling Amplified Electret
Noise Reduction ≤ 12 dB
Power via mic bias
Power Requirements Microphone Bias (requires boom microphone to be powered continuously)
Speaker Dynamic
Speaker Sensitivity 85-95 SPL/mW
Stereo No
Weight 4.02 oz (113.98 g)


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RTS is part of the Bosch Communications Systems family of brands, offering the world's most complete portfolio of professional audio and communications solutions.

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