The A20® Aviation Headset is engineered to be more comfortable and provide more noise reduction than any headset we’ve ever made, while still delivering the clear audio you expect from Bose. And now there are more features than ever, including: a Bluetooth® audio and communications interface; customizable audio prioritization control; intuitive “plug-and-play” operation; a high-performance microphone and an optional coil cord. And at just 340 grams (12 ounces), it’s still one of the lightest active noise cancelling headsets out there. No other headset offers this unique combination of features and benefits.

Key Benefits

  • Industry-leading active noise reduction for pilots. Average of 30% greater active noise reduction than conventional noise reducing aviation headsets.
  • High level of comfort achieved through choice of materials and distribution of weight throughout the headset, resulting in 30% less clamping force than conventional noise reducing headsets. Plus, there’s additional room for the ears.
  • Clear audio with active equalization for enhanced communications.
  • Bluetooth® audio and communications interface for connectivity with your communication, navigation and audio devices.*
  • Wired auxiliary audio input located on the control module.
  • Customizable audio prioritization control so you can decide which audio source you want to hear.
  • At least 45 hours of typical headset use from just two AA alkaline batteries.
  • Flexible power circuitry with auto on. Headset senses the power source (battery or aircraft) and can automatically turn on with the aircraft power.**
  • Distinct left and right earcups with swappable cable for improved comfort and ergonomics.
  • Certified to FAA TSO-C139 and EASA ETSO-C139 standards.
  • Among the lightest headsets in the category, with a weight of just 340 grams (12 ounces).
  • Coil cord down-cable option now available.

*Only on Bluetooth® enabled models of the A20®.
**Available in variants of the headset that use aircraft power for the active noise reduction system.

Additional information

Weight 320 g
Dimensions 21.4 × 16.1 × 8 cm

Damage could occur to avionics equipment that is intended for use only with 600 Ohm headsets. If in doubt, consult the avionics equipment manufacturer.

Headphone impedance

Monaural mode: 160 Ohm ON and OFF
Stereo mode: 320 Ohm ON and OFF

Frequency response

15 Hz to 15 kHz
Sensitivity: 92 dB SPL typical, measured at 1 mw, 1 kHz, full volume on a KEMAR ear simulator.

Microphone (Electret)

Bias required: 8 to 16 VDC through 220 to 2200 Ohm.
Sensitivity: Varies depending on bias and AC radio input impedance. Typical output is 600 mV at 114 dB SPL. To assure proper modulation of the radio, it is recommended that an avionics technician adjusts its input to match the output of the microphone.

Microphone (Dynamic)

Impedance: 5 Ohm or 150 Ohm dynamic microphone
Sensitivity: Equivalent to M-87/M-101

Maximum ambient noise level

115 dBC SPL for full active noise reduction performance

Power source

Battery-powered: Two (2) AA alkaline
Aircraft-powered: 10 to 32 VDC


Battery-powered: Two (2) AA alkaline batteries
Aircraft-powered: 10 to 32 VDC

Battery life

Alkaline battery life: At least 45 hours in typical general aviation aircraft noise. Duration
varies with battery age, ambient noise levels, temperature, ear cushion seal, and use of
the Bluetooth® feature.


Operating: 25 mA in typical aircraft noise

Temperature and Altitude (Category A)

Operating: -15 to 55°C (5 to 131°F)
Storage: -55 to 70°C (-67 to 158°F)
Altitude: 15,000 feet maximum pressure altitude for full cancellation

Bluetooth® wireless technology



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