Bose A20 manual Technical Information

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TECHNICAL INFORMATION

Headphone

Damage could occur to avionics equipment that is

 

intended for use only with 600 Ohm headsets. If in doubt,

 

consult the avionics equipment manufacturer.

 

 

Impedance

Monaural mode: 160 Ohms ON and OFF

 

Stereo mode: 320 Ohms 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 Ohms.

 

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 mic

 

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

 

 

Voltage

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.

 

 

Current

Operating: 25 mA in typical aircraft noise

 

 

Fuse/breaker recommended

1/4 amp, fast-blow fuse (AGC 1/4 amp fuse) or 1/2 amp

 

circuit breaker

 

 

Headset weight

12 ounces

 

 

Headset size range

Slider not extended:

 

8.425" (214mm) H x 6.34" (161mm) W x 3.15" (80mm) D

 

Slider extended:

 

10.2" (259mm) H x 6.6" (168mm) W x 3.15" (80mm) D

 

 

Control module dimensions

1.5" (38.1mm) H x 1.5" (38.1mm) W x 4.92" (125mm) D

 

 

Temperature and Altitude

Operating: 5 to 131°F (-15 to 55°C)

(Category A)

Storage: -67 to 158°F (-55 to 70°C)

 

Altitude: 15,000 feet maximum pressure altitude for

 

full cancellation

 

 

Bluetooth wireless technology

Hands-free profile, Bluetooth 2.1

 

 

Bluetooth technology QD ID

Bose® A20® Aviation Headset: B016487

 

 

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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.