Bose A20 User Manual

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A20® AVIATIONHEADSET

Owner’s Guide

SAFETYINFORMATION

NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning this equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

Re-orientor relocate the receiving antenna.

Increase the separation between this equipment and receiver.

Connect this equipment into an outlet on a circuit different from that to which the receiver is connected.

Consult Bose or an experienced radio/TV technician for help.

Changes or modifications not expressly approved by Bose Corporation could void the user’s authority to operate this equipment.

Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.

This device complies with FCC and Industry Canada RF radiation exposure limits for general population. It must not be collocated or operating in conjunction with any other antenna or transmitter.

Bose Corporation hereby declares that this product is in compliance with the essential requirements and other relevant provisions of Directive 1999/5/EC and all other applicable EU directive requirements. The complete declaration of conformity

can be found at: www.Bose.com/compliance.

Operate this product within the temperature range of 5°F to 131°F (-15°Cto 55°C) only.

Important Safety Instructions

Please read these instructions carefully and completely before using the headset.

Keep these instructions and make these instructions easily accessible to all users at all times. Always include these instructions when passing the headset on to third parties.

During flight operations, do not use the headset for telephone calls.

It is the responsibility of each aircraft operator or pilot in command to determine that any and all portable devices will be free of any interference with the navigation or communication system of the aircraft. In addition, it is their responsibility to determine the suitability of the performance of portable devices in relation to the use of the Bose® A20® Aviation Headset.

The headset is capable of producing sound pressure levels exceeding 85dB(A). In many countries 85dB(A) is the maximum legally permissible level for continuous noise exposure during the working day. Exposure to sounds of higher volume levels or longer durations can permanently damage your hearing.

Never repair or attempt to repair a defective headset yourself. Contact Bose® Technical Support. Refer to “Contact information” on page 37.

Do not immerse the headphones in water or any other liquid. See “Cleaning the headset” on page 23 for cleaning instructions.

Warning: Choking

hazard. Keep the batteries away from children.

Danger of explosion if

batteries are incorrectly replaced.

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

Batteries may cause a fire or chemical burn if mishandled. Do not recharge, disassemble, heat, or incinerate. Dispose of used batteries properly.

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CONTENTS

ADVISORIES

1

 

 

Operational advisory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Hearing safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Volume control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Recognizing aircraft sounds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Using audio sources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Headset earcup requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Earcup inner screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

INTRODUCTION

4

What’s included . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 What’s in the carton . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Control module variations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Power and cable variations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7

PREPARING THEHEADSET FORUSE

8

The microphone assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Attaching the microphone assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 The battery compartment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Opening the battery compartment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 The operation switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Inserting and replacing the batteries . . . . . . . . . . . . . . . . . . . . . . . . . . .

10

Connecting the headset to the aircraft . . . . . . . . . . . . . . . . . . . . . . . . . . .

11

Using the 6-pinplug . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

11

Using the dual general aviation plugs . . . . . . . . . . . . . . . . . . . . . . . . . . .

12

Using other plug types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

12

USING THEHEADSET

13

Wearing and adjusting the headset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

13

Conditions related to fit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

13

Microphone placement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Clothing clips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Using the control module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Power button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Volume control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Power indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Auxiliary (AUX) audio input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Audio priority . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Using the headset with a Bluetooth®-enabledphone . . . . . . . . . . . . . . . . 19 Pairing the headset with your phone . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Bluetooth® volume control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Making and answering calls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

22

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CONTENTS

HEADSETCARE ANDMAINTENANCE

23

 

 

Instructions for continued airworthiness . . . . . . . . . . . . . . . . . . . . . . . . . 23 Cleaning the headset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 General cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 Headset earcup openings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Microphone windscreen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

24

Earcup inner screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

24

Headband cushion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

24

Replacing parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

24

Microphone windscreen replacement . . . . . . . . . . . . . . . . . . . . . . . . . .

24

Ear cushion replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

25

Battery replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

25

Headband cushion replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

26

Microphone assembly or access cover replacement . . . . . . . . . . . . . .

26

Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

26

TROUBLESHOOTING

27

In case of difficulty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

27

INSTALLATION

31

Mounting the aircraft panel connector . . . . . . . . . . . . . . . . . . . . . . . . . . .

31

Details on making the connections . . . . . . . . . . . . . . . . . . . . . . . . . . . .

33

TECHNICALINFORMATION

34

SERVICE ANDWARRANTYINFORMATION

36

Locating the headset serial number . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

36

Warranty period . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

36

Limited warranty service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

36

To return your headset to Bose for repair . . . . . . . . . . . . . . . . . . . . . . .

36

Contact information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

37

Ordering parts and accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

37

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ADVISORIES

Operational advisory

The Bose® A20® Aviation Headset incorporates Acoustic Noise Cancelling® technology. As with any complex electronic device, it is possible for this headset to fail during operation. Symptoms of failure may include loud tones, distortion, and loss of communications signal in the headset when used in the Acoustic Noise Cancelling mode.

Note: The headset includes redundant circuitry to reduce the effects of such failures and to allow for continued use of the headset in the passive noise reducing mode.

In passive noise reducing mode, the volume controls on the control module will automatically be set to maximum volume. If additional volume control is needed, you can use the intercom or radio volume control.

Acoustic Noise Cancelling mode is active when the headset control module is powered on (power indicator is lit). The headset is in the passive mode when the power is off (power indicator is not lit). See “Control module variations” on page 6.

If your headset is aircraft powered, connect the headset to the aircraft power sources only as described in “Connecting the headset to the aircraft” on page 11. The headset will not operate properly if used with any battery source other than the Bose A20 Aviation Headset control module.

Note: In the unlikely event of a headset issue, we suggest that you switch to an alternate communications method and use standard cockpit resource management skills to minimize distractions.

1

ADVISORIES

Hearing safety

The headset is intended for use with the Acoustic Noise Cancelling® mode turned on. Noise reduction and communications performance are reduced with Acoustic Noise Cancelling mode turned off.

Volume control

Make sure your aircraft communications system volume control is easily accessible. This control affects the strength of the communications signal coming into the headset.

As pilot in command, you must be sure you can understand critical communications even with Acoustic Noise Cancelling mode turned off. In this case, you may need to turn up the aircraft communications system volume.

Avoid setting the volume controls at levels high enough to impair your hearing during extended periods of headset use.

Recognizing aircraft sounds

With the headset’s active and passive noise reduction, typical aircraft sounds (such as engines, propellers, warning alarms, and other sound sources) may not sound familiar. We strongly advise you to make sure you can hear and recognize these sounds when using the Bose® A20® Aviation Headset while operating any aircraft.

Using audio sources

When listening to in-flightentertainment, or a portable audio source through a Bose A20 Aviation Headset, be sure to limit the volume to safe levels that do not interfere with your ability to hear informational sounds and warning alarms, such as stall warnings or gear up, while piloting.

2

ADVISORIES

Headset earcup requirements

Proper headset operation requires that the headset TriPort® openings on the earcup are kept free of debris. The headset TriPort openings are located on the outside of each earcup and include two holes and a screen.

TriPort

opening

Microphone

opening

Earcup inner screen

The protective inner screen is critical to the headset’s performance.

Earcup

inner screen

Do not attempt to remove, replace, or repair this screen. If screen replacement seems necessary, contact Bose® Technical Support. See “Contact information” on page 37.

If the screen gets wet or any foreign objects become lodged on or adjacent to it, follow the instructions in “Headset Care and Maintenance” on page 23.

3

INTRODUCTION

Congratulations on your purchase of a Bose® A20® Aviation Headset. The Bose A20 Aviation Headset is our most advanced aviation headset yet. It delivers significantly increased noise reduction and provides a more comfortable fit, without compromising the clear audio you expect from Bose. Plus, it offers auxiliary audio input and is available withBluetooth® wireless technology.

What’s included

Each Bose A20 Aviation Headset is supplied with a control module, cable, and carrying case. The type of control module and end-plugconfiguration depends on the options you chose for your headset.

There are two options for the control module:

Control module with Bluetooth wireless technology

Conventional control module

There are several end-plugconfigurations for the headset. Your headset falls into one of two general categories:

Battery powered: Operates with battery power only.

Dual powered: Operates with either aircraft or battery power. No battery needed when connected to aircraft power.

4

INTRODUCTION

What’s in the carton

Headset assembly:

Headphones

Clothing clip

Control module

See “Control module variations” on page 6 for options.

Second clothing clip

Cable connector (varies)

Accessories:

Carrying case

2 AA alkaline batteries*

3.5 mm adapter cable

Note: Cable connector types will vary based on model of headset. See “Power and cable variations” on page 7.

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

5

INTRODUCTION

Control module variations

If you opted for Bluetooth® wireless technology, you received the control module featuringBluetooth technology. If not, you received the conventional control module.

Bluetooth control module

Conventional control module

Left/Right volume controls*

Power indicator

Power button

Bluetooth indicator

Bluetooth

Bluetooth

function button

Volume Up button

 

Multifunction

 

Audio Priority

switch:

Bluetooth

switch:

Top

Volume Down button

Top

Intercom

 

Intercom

prioritized

Auxiliary (AUX)

prioritized

Middle

Middle

audio input

Intercom

Intercom

 

mixed

 

mixed

Bottom

 

Bottom

Intercom

 

Intercom

only

 

only

*Control the intercom volume

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