Bose A20 Owner's Manual
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Bose A20 Owner's Manual

Bose a20 aviation headset
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Bose
A20
®
®
Aviation Headset
Owner's Guide

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Summary of Contents for Bose A20

  • Page 1 Bose ® ® Aviation Headset Owner’s Guide...

  • Page 2: Important Safety Information

    It is a pilot’s responsibility to ensure that portable devices do not interfere with the aircraft’s navigation and communication systems, as well as to determine if the portable device is suitable for use with the Bose ® Aviation Headset.
  • Page 3 Operate this product within the temperature range of 5°F to 131°F (-15°C to 55°C) only. 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 require- ments.

  • Page 4: Table Of Contents

    Contents Introduction ..................6 What’ s included ........................6 What’ s in the carton ......................7 Headset assembly ......................7 Control module variations .................... 8 Power and cable variations ..................9 Preparing the Headset for Use ............10 The microphone assembly ....................10 Attaching the microphone assembly ................10 The battery compartment ....................
  • Page 5 FAA Technical Standards Order ..................37 Service and Warranty Information ..........38 Locating the headset serial number .................38 Warranty ..........................38 Limited warranty service ....................38 To return your headset to Bose for repair ..............38 Contact information ....................39 Ordering parts and accessories .................39 English - 5...

  • Page 6: Introduction

    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 with Bluetooth compatibility.

  • Page 7: What's In The Carton

    Introduction What’s in the carton Headset assembly Headphones Carrying case Clothing clip 2 AA alkaline batteries* Control module See ““Control module variations” on page 8 for options 3.5 mm adapter cable Second clothing clip Cable connector (varies) Note: Cable connector types will vary based on model of headset. See “Power and cable variations”...

  • Page 8: Control Module Variations

    Introduction Control module variations If you opted for the Bluetooth compatible version of the headset, you received the Bluetooth control module. If not, you received the conventional control module. Bluetooth control module Conventional control module Left/Right volume controls* Power indicator Power button Bluetooth indicator...

  • Page 9: Power And Cable Variations

    5-pin XLR U384 8-pin 4-pin XLR * An adapter is available from Bose to convert a 6-pin connector to a dual G/A or U174 plug for additional connection flexibility. Other configurations require the purchase of a cable assembly. English - 9...

  • Page 10: Preparing The Headset For Use

    Preparing the Headset for Use The microphone assembly Your headset may be shipped with the microphone assembly (boom microphone and cable) attached to the left earcup. If your headset is shipped with the micro- phone assembly packed separately, you can attach it to either earcup. Attaching the microphone assembly Choose the earcup (L or R) to receive the microphone assembly.

  • Page 11: The Battery Compartment

    Preparing the Headset for Use The battery compartment The Bose Aviation Headset is shipped with factory-set operation defaults. ® ® If you want to alter these defaults, you can change the operation switches located inside the control module battery compartment. If you do not want to change any of the operation switches, skip ahead to “Inserting and replacing the batteries”...

  • Page 12: Inserting And Replacing The Batteries

    Preparing the Headset for Use 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.

  • Page 13: Connecting The Headset To The Aircraft

    If your headset is aircraft-powered, a 6-pin connector must be installed and mount- ed to an aircraft panel. See “Mounting the aircraft panel connector” on page 33. Note: An adapter is available from Bose to convert a 6-pin connector to a dual G/A or U174 plug for additional connection flexibility.

  • Page 14: Using The Dual General Aviation Plugs

    Then insert the thinner microphone plug into the other jack. Microphone Intercom/Audio Using other plug types The Bose Aviation Headset is also available with other types of plugs for ® ® connecting to various aircraft audio jacks. These single-plug connectors should be inserted into the appropriate jack on your aircraft control panel.

  • Page 15: Using The Headset

    ® pressure change. If the problem continues when the sound level returns to normal, see “Troubleshooting” on page 29. If the problem persists, contact Bose Technical Support for assistance. Conditions related to fit A low rumbling sound or frequent, brief losses of Acoustic Noise Cancelling noise reduction may indicate an improper fit or blocked earcup ports.

  • Page 16: Clothing Clips

    Using the Headset Grasp the boom with your fingers and move the microphone up or down so it is level with your mouth. Pull the microphone in toward your lips. Position the microphone with its talk side facing in. Though it will be slightly off center, the microphone should be 1/2 inch from the opening of your lips.

  • Page 17: Using The Control Module

    Using the Headset Using the control module Use the control module to control the headset functions. There are two variations of the module; one featuring Bluetooth wireless technology and one that has basic functions only. Bluetooth control module Conventional control module Left/Right volume controls* Power indicator Power button...

  • Page 18: Volume Control

    Using the Headset • Double-click the power button to dim the power and Bluetooth wireless technol- ogy indicators. To toggle the indicators between dim and bright, rapidly press the power button twice. Volume control The left and right volume control wheels on the control module adjust the volume of the corresponding earcup.

  • Page 19: Auxiliary (Aux) Audio Input

    Auto Off feature for uninterrupted functionality. Audio priority The Bose A20 Aviation Headset allows you to decide the priority of the audio sources you want to hear while using the headset. On the Bluetooth control module, the audio priority is controlled by the multifunction switch. On the conven- tional control module, the audio priority is controlled by the audio priority switch.

  • Page 20: Multifunction/Audio Priority Switch

    Using the Headset Multifunction/Audio priority switch The multifunction/audio priority switch has three positions: Position Function Operation Intercom prioritized When the switch is in the top position and over AUX an intercom signal is detected, AUX audio is muted. Middle Intercom mixed with When the switch is in the middle position and an intercom signal is detected, AUX audio is mixed with the intercom audio.

  • Page 21: Using The Headset With A Bluetooth Compatible Phone

    Blackberry: Home > Manage Connections > Set up Bluetooth For other phones, check the phone’s user guide. Select Bose A20 from the Bluetooth device list. If you are asked for a passkey or PIN, enter the digits 0000. The control module’s Bluetooth and power indicators flash together to confirm successful pairing.

  • Page 22: Bluetooth Indicator Light Status

    The headset control module attempts to connect with the last connected Bluetooth device. Note: The Bose A20 Aviation Headset can only be connected to one Bluetooth device at a time. If you press the Bluetooth function button on the headset control module for more than five seconds, the currently connected Bluetooth device is disconnected and the control module enters pairing mode.

  • Page 23: Bluetooth Volume Control

    Using the Headset Bluetooth volume control The Bluetooth volume control increases or decreases the volume of the mobile phone that is paired to the Bose Aviation Headset. The Bluetooth volume ® ® control is located on the right side of the control module. You can only adjust the Bluetooth technology volume during an active phone call.

  • Page 24: Making And Answering Calls

    Using the Headset Making and answering calls To make a call Dial from your mobile phone, and the call will automatically transfer to the headset. If your phone has voice-activated dialing, press the Bluetooth function button and wait for the phone voice prompts. To activate voice dialing (if your phone provides this feature) When there are no active or incoming calls, briefly press the Bluetooth function button.

  • Page 25: Headset Care And Maintenance

    If cleaning or replacement of these items is needed, follow the recommendations on the following pages. All other care and maintenance, in and out of the warranty period, must be performed by Bose or an authorized repair facility.

  • Page 26: Microphone Windscreen

    Allow the cushion to air dry, then reattach. Replacing parts Through normal use, parts like windscreens and ear cushions may require periodic replacement. Replacement parts can be ordered directly from Bose Corporation. Please refer to “Contact information” on page 39. Microphone windscreen replacement Roll the band that secures the windscreen off the tip of the microphone and dispose of it.

  • Page 27: Ear Cushion Replacement

    Headset Care and Maintenance Ear cushion replacement As a general rule, ear cushions should be replaced every six months or every 350 hours of use, depending on how often you fly. You may have to replace them more often, if you: •...

  • Page 28: Headband Cushion Replacement

    The headband cushion is designed to give the maximum level of comfort to your headset. Bose recommends that you replace the cushion after regular care and maintenance fails to restore the wool pile to its original size and shape. To replace the cushion: On a protected surface, turn the headset upside down.

  • Page 29: Troubleshooting

    Look for the problem in the left column of the table, then follow the “What to do” instructions in the right column. If the problem persists, contact Bose using the contact information on page 39 of this guide for assistance.
  • Page 30 • If the squealing or whistling sound persists, turn off the power switch and contact Bose for service as soon as possible. 30 - English...
  • Page 31 Troubleshooting Problem What to do Low rumbling • Adjust the earcup fit to create a better seal on your head. The sound with the low-force design of the headset makes it sensitive to items that headset turned interfere with the seal around your ear. Make sure your ears are on in a quiet completely inside the ear cushions, and that a hat or eyeglasses environment.

  • Page 32: Bluetooth Connection

    Troubleshooting Problem What to do Cannot hear com- • Check headset prioritization settings. Refer to “Multifunction/ munications while Audio priority switch” on page 20. listening to audio • Communications audio is not present unless the headset is from AUX input or connected to an intercom system.

  • Page 33: Installation

    Mounting the aircraft panel connector The aircraft panel connector is part of the optional 6-pin wiring harness assembly. Visit www.Bose.com or www.Global.Bose.com for information or purchase. WARNING: The aircraft panel connector must be mounted by a technician who is qualified to perform this type of avionics installation for the aircraft you are using.
  • Page 34 CAUTION: Do not use excessive force or bend the installed connector. This may damage or break internal solder joints. Note: The aircraft panel connector cannot be installed in an audio system using transformer-coupled audio outputs. Contact Bose Technical Support, using the contact information on page 39 for details. Mono connection diagram...

  • Page 35: Details On Making The Connections

    Installation Helicopter (U174) connection diagram WHT/BLU MIC LO MIC HI COMM R COMM L 10-32 V+IN 1/2A V DC Existing single 4- prong jack Existing wiring to Barrel helicopter intercom/ (audio gnd) audio panel Note: Barrel ground (gnd) refers to aircraft grounds. Details on making the connections The pinouts for the optional installed connector are detailed in the table below: Pin number...

  • Page 36: Technical Information

    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 QD ID Bose Aviation Headset: B016487 ® ® 36 - English...

  • Page 37: Technical Information

    Technical Information FAA Technical Standards Order The Bose Aviation Headset that are approved to TSO and ETSO C139 are ® ® appropriately marked. The product interface, cables, and microphones have been designed to function in or withstand exposure to the following environmental...

  • Page 38: Service And Warranty Information

    ® located on the underside of the headband and underneath the headband cushion. Reference this serial number when you register your product or contact Bose for technical support. Be sure to properly reseat the headband cushion by pressing down firmly. For more information on replacing the headband cushion, see Refer to “Headband cushion...

  • Page 39: Contact Information

    World Wide Web: www.Bose.com Ordering parts and accessories The following accessories and customer-replaceable parts can be purchased directly from Bose. See the contact information above. • Additional control module cable - Specify: Bluetooth technology or conventional module - Specify: Connector type •...
  • Page 40 ©2014 Bose Corporation, The Mountain, Framingham, MA 01701-9168 USA AM325453 Rev. 09...

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