Bose Understanding A20 Auto Off, Battery Type, and Maintenance Procedures
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PREPARING THE HEADSET FOR USE

3.To change a switch position, use a pen or a small, flat-tipped screwdriver to gently move the switch.

This table shows possible positions, default setting, and purpose for each switch.

Switch

Options

Purpose

 

 

 

 

1.

Auto Off

ON, OFF

Set at the factory to enable the Auto Off function. The headset

 

function

Default: ON

will turn off after 3 to 9 minutes of inactivity. To disable Auto

 

 

Off, set the switch to OFF. With the switch in OFF position, the

 

 

 

Acoustic Noise Cancelling® system will not turn off until you

 

 

 

press and hold the power button for at least one second.

 

 

 

 

2.

Mono/

Mono, Stereo

For most configurations, set at the factory for mono audio

 

Stereo

Default: MONO

systems (to provide audio in both ears). Set it to stereo (ST)

 

selection

if your aircraft has a stereo intercom.

 

 

 

 

Auto Off functionality

The Auto Off feature detects when the headset is not in use and shuts it off after several minutes to preserve battery power. The exact time it takes to shut off varies and can range between 3 to 9 minutes after you stop using the headset.

When the headset is running on battery power only and is not plugged in to an intercom, it will shut off even when there is an auxiliary input present.

If you are on a phone call and unplugged from an intercom, the headset will allow you to complete your call, then it will turn off approximately three seconds after the call is terminated.

Note: To use the headset when unplugged from the intercom to listen to auxiliary input audio or as a Bluetooth® wireless technology-enabled headset to make or receive calls, we recommend you disable the Auto Off feature for uninterrupted functionality.

Inserting and replacing the batteries

CAUTION: If the batteries do not fit correctly, do not force them in. Forcing an improper connection will cause permanent damage to the control module.

To insert or replace the batteries

1.Turn off headset power.

2.Press down firmly on the battery compartment cover and slide the cover to release. The battery door is tethered. Do not detach the door from module.

3.Insert the two supplied alkaline AA batteries into the control module, observing proper polarity.

4.Replace the battery compartment cover.

Note: Replace batteries with alkaline batteries only. Do not use any other battery chemistries.

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Contents A20 Aviation Headset Important Safety Instructions Safety InformationContents Troubleshooting Operational advisory Using audio sources Hearing safetyVolume control Recognizing aircraft soundsHeadset earcup requirements Earcup inner screenWhat’s included IntroductionHeadset assembly What’s in the cartonBluetooth control module Conventional control module Control module variationsPower and cable variations Battery powered options Dual powered optionsMicrophone assembly Attaching the microphone assemblyOperation switches Battery compartmentOpening the battery compartment To change the operation switchesTo insert or replace the batteries Inserting and replacing the batteriesAuto Off functionality To connect the headset Connecting the headset to the aircraftUsing the 6-pin plug To disconnect the headsetUsing the dual general aviation plugs Using other plug typesConditions related to fit Wearing and adjusting the headsetMicrophone placement Clothing clips Using the control module Power buttonPower indicator Indicator color Power source Type of light IndicatesAuxiliary AUX audio input Audio priorityMultifunction/Audio priority switch Multifunction/audio priority switch has three positionsUsing the headset With a Bluetooth-enabled phone Pairing the headset with your phoneRecovering a lost connection Bluetooth indicator light statusReconnecting to a previously connected phone Disconnecting a Bluetooth technology-enabled phoneBluetooth volume control To clear pairing device history from the headsetMaking and answering calls Instructions for airworthiness Cleaning the headsetGeneral cleaning Headset earcup openingsMicrophone windscreen Replacing partsMicrophone windscreen replacement Headband cushionReplacing the ear cushions Ear cushion replacementBattery replacement Storage Headband cushion replacementMicrophone assembly or access cover replacement Communications Case of difficultyNoise Reduction Audio Auxiliary audio input Bluetooth wireless technology Auto offMounting the aircraft panel connector Mono connection diagram Stereo connection diagramHelicopter U174 connection diagram Details on making the connectionsTechnical Information FAA Technical Standards Order Condition CategoryLocating the headset serial number WarrantyLimited warranty service To return your headset to Bose for repairOrdering parts and accessories Contact informationService and Warranty Information

A20 specifications

The Bose A20 Aviation Headset is a remarkable piece of technology designed specifically for aviators and aviation enthusiasts. Since its release, it has garnered a reputation for delivering superior sound quality, comfort, and durability. Manufactured by the well-known audio company Bose, this headset integrates cutting-edge features that enhance the flying experience for pilots and passengers alike.

At its core, the Bose A20 boasts advanced noise cancellation technology. It employs an active noise reduction system that effectively eliminates unwanted ambient noise, allowing users to concentrate on their surroundings and communication without distractions. This feature is especially crucial in the noisy environment of an aircraft cockpit, where engine noise levels can be overwhelming. The A20 significantly reduces this noise, enhancing clarity during radio transmissions.

The headset also offers excellent audio performance. With clear and balanced sound reproduction, the A20 ensures that every communication and audio alert is heard without distortion. This is complemented by integrated Bluetooth technology, which enables wireless connectivity to mobile devices. Pilots can easily stream music or receive phone calls while keeping their hands free, further enhancing the headset's functionality.

Comfort is another hallmark of the Bose A20. The headset is designed for long-duration wear, featuring plush ear cushions and a lightweight construction. The adjustable headband allows for a customized fit, minimizing fatigue even during extended flights. Additionally, the A20 is built to withstand the rigors of aviation use, with rugged materials that ensure longevity.

Another standout characteristic is the intuitive controls and design. The headset is user-friendly, with simple buttons that allow pilots to adjust noise cancellation levels and manage Bluetooth connections effortlessly. Furthermore, the inclusion of a detachable audio cable adds versatility, making it compatible with various aircraft and devices.

In conclusion, the Bose A20 Aviation Headset is a top choice for pilots seeking an exceptional combination of sound quality, advanced noise reduction, comfort, and user-friendly features. Its innovative technology and thoughtful design make it a vital tool for anyone serious about aviation, ensuring a more enjoyable and productive flying experience. Whether in a small general aviation aircraft or a larger commercial cockpit, the A20 stands out as a leader in the aviation headset market.
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