324843-1030 Bose A20 Straight Cord, U-174, Bluetooth from Bose

A20™ aviation headset

Straight Cord, Helicopter Version (U-174 Plug) w/Bluetooth

Designed to deliver significantly better noise reduction in even louder environments
Provides greater comfort and stability, with more room for your ears
uxiliary audio input for GPS and other devices
Bluetooth® mobile phone connectivity
Meets or exceeds all FAA and JAA TSO requirements

The Bose® A20 aviation headset is the most advanced pilot headset yet. Its breakthrough innovations reduce more noise and provide even greater comfort than previous models, without compromising the clear audio you expect from Bose. Plus, the A20 Aviation Headset now includes auxiliary audio input and Bluetooth phone connectivity.

Next-generation pilot headset
More than 20 years ago, Bose introduced active noise reducing headsets to aviation—and launched an entire industry. Year after year, pilots have made our headsets their #1 preference. Now, the A20 aviation headset introduces an entirely new standard.

Enjoy a quieter flight
Proprietary technologies in the A20 aviation headset reduce more noise than ever before, across the full spectrum of human hearing, in even louder environments. Advanced electronics now use microphones both inside and outside each earcup to sense and reduce more ambient sound. Watch video.

Improved Bose ear cushion technology helps further reduce unwanted noise. New cushion materials block more sound before it enters the earcups, providing an even quieter headset experience.

And even greater comfort
The A20 aviation headset also provides a new level of comfort and stability. The overall headset profile is more compact, but the earcup cavity has been enlarged to allow more room for the ears. These proprietary cushions improve the earcups' acoustic seals, even over eye glasses, and remain comfortable during long flights. The solid magnesium headband is extremely durable, yet lightweight, and its sheepskin cushion eliminates hot spots.

All these improvements have been achieved without increasing the headset's weight or clamping force. The A20 headset weighs just 12 ounces and exerts significantly less clamping force than most active headsets.

AUX IN and Bluetooth technology convenience
The redesigned control module now includes an auxiliary audio input with Intercom/AUX priority switching. Many pilots will want to use this input for dedicated GPS and traffic warning systems. You can set audio priority to mute the AUX input completely when intercom signal is detected, or to simply lower the AUX volume appropriately.

Bluetooth mobile phone connectivity allows you to receive calls wirelessly while wearing the A20 headset. And its enhanced EMI protection helps minimize interference from the mobile phone. Plus, the headset's integrated sidetone provides a more natural feel to Bluetooth phone conversations, even when you're disconnected from the intercom.

Smart power control
The power system in the A20 aviation headset includes a smart shutoff feature that helps provide at least 45 hours of use from just two AA alkaline batteries. With the installed version of the headset, the technology intelligently switches from aircraft power to battery power as needed.

The A20 aviation headset features greatly improved noise reduction across a wider range of frequencies
Significantly improved noise reduction across a wider range of frequencies. Proprietary Bose innovations now use microphones both inside and outside each earcup to sense and reduce more ambient aircraft noise.

Redesigned ear cushions deliver greater comfort and improved stability
Redesigned ear cushions deliver greater comfort using new materials. More compact earcups now have a larger interior cavity, allowing more room for the ears; redistribution of headset weight also helps improve overall comfort and stability.

Feature	Function	Benefit
Bose Acoustic Noise Cancelling headset Technology	Sound is monitored outside the earcups and at the ears, unwanted noise is identified, and a correction signal is created to cancel the unwanted noise.	The most advanced aviation noise reduction technology from Bose fades background distractions. It reduces significantly more noise and operates in even louder noise environments than ever before.
TriPort acoustic headset design	Proprietary Bose technology uses acoustically tuned ports to optimize the low frequency output of the system	Enables a wide range of sound, including lower notes, from small earcups.
Active equalization	Electronic circuitry equalizes incoming audio signals	Clian, full sound quality that enhances intelligibility of intercom audio and clarity of music reproduction
Adjustable boom microphone	Provides the means of communication for pilots and Passengers	The boom microphone is adjustable and allows users to position it properly in front of their mouth. It is designed to deliver clear communications and remain stable without changing position with head movement
Redesigned earcup architecture	Provides more room for customers' ears without compromising overall headset size	Fits most ear sizes, for a more comfortable fit
Magnesium alloy headband	Provides strong, lightweight structural frame to support the headset and distribute the necessary clamping force	Contributes to a remarkably lightweight headset while maintaining exceptional durability
Side swappable down cable	Allows easy attachment of integrated cable/boom mic assembly to either earcup	Added convenience and versatility: Enables owner to attach boom mic and cable assembly to either earcup and use multiple headset configurations with one headset
Headband stop	Prevents headband from closing completely when not in use	Prevents contact between ear cushions improving durability
L/R markings	Identifies the left and right earcups for proper placement on the head.	Ergonomic design of the earcups - angled to match the contour of the ears - provides comfortable fit with superior noise reduction performance.
Integral circuit shielding	Shields sensitive electronics from the harsh electromagnetic interference (EMI) associated with ground and airborne transmitters	Significantly reduces EMI - reducing annoying audible distractions that impede clear audio and communications
FAA/JAA TSO Certified	Meets or exceeds requirements for headset performance	Provides assurances of proper performance
Limited 5-year transferable warranty	Limited warranty coverage for parts, labor and second day return shipping expenses of non-abusive malfunction	Customers have peace of mind and confidence in their initial investment with Bose Corporation
Auxiliary audio input	Input jack for external audio sources such as GPS systems and music players	Customers can enjoy the flexibility of an external audio source while still benefiting from the noise reduction performance and comfortable fit of the headset
Independent receded L/R volume controls with midrange detent and visual volume level indicator	Adjust the headset audio volume level for left and right channels	Allows for fast, accessible thumb-controlled volume and prevents unintended volume level change.
Pwer LED and battery life indicators	Indicates when the noise reduction is turned on.(Green: healthy battereis, yellow:2-8 hours left, red: less that 2 hours remaining)	Provides pilots real time battery life indication taking the guesswork out of when to replace batteries
User configurable switches	Stereo/mono switch to configure the headset for a specific intercom. Auto-off (on/off) switch gives user the option of automatic or manual power control	Gives users easy, quick configuration of the control module to suit their specific needs
Audio prioritization switch	Manages the different audio signals available to the headset (intercom, aux-in)	Allows users to decide what audio sources they want to hear
Automatic smart shutoff	Detects that the headset is no longer being used and automatically shuts off power after a period of inactivity	Guards against draining of batteries when the headset is not in use

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