Quick reference guide
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... Headset QUICK REFERENCE GUIDE Bluetooth® control module Conventional control module Left/Right volume controls* Power indicator Power button Bii iiiiiiii Bluetooth function button C Bluetooth Indicator Ai Multifunction switch: Top Intercom prioritized Middle Intercom mixed Bottom Intercom only Bluetooth Volume Up Bluetooth Volume down Auxiliary (AUX) audio input Audio Priority switch: Top Intercom prioritized Middle Intercom mixed Bottom Intercom only Pairing the Headset with your phone to "discover" the Bose A20 Aviation Headset Select "BOSE A20" on the phone.** 4. Set...
... Headset QUICK REFERENCE GUIDE Bluetooth® control module Conventional control module Left/Right volume controls* Power indicator Power button Bii iiiiiiii Bluetooth function button C Bluetooth Indicator Ai Multifunction switch: Top Intercom prioritized Middle Intercom mixed Bottom Intercom only Bluetooth Volume Up Bluetooth Volume down Auxiliary (AUX) audio input Audio Priority switch: Top Intercom prioritized Middle Intercom mixed Bottom Intercom only Pairing the Headset with your phone to "discover" the Bose A20 Aviation Headset Select "BOSE A20" on the phone.** 4. Set...
Owner's guide
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... in a particular installation. Batteries may cause harmful interference to radio communications. Changes or modifications not expressly approved by turning this device must not be found to comply with the limits for a Class B digital device, pursuant to Part 15 of producing sound pressure levels exceeding 85dB(A). Operation is connected. - Important Safety Instructions • Please read these instructions carefully and completely before using the headset. • Make these instructions when passing...
... in a particular installation. Batteries may cause harmful interference to radio communications. Changes or modifications not expressly approved by turning this device must not be found to comply with the limits for a Class B digital device, pursuant to Part 15 of producing sound pressure levels exceeding 85dB(A). Operation is connected. - Important Safety Instructions • Please read these instructions carefully and completely before using the headset. • Make these instructions when passing...
Owner's guide
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... operation switches 9 Inserting and replacing the batteries 10 Connecting the headset to the aircraft 11 Using the 6-pin plug 11 Using the dual general aviation plugs 12 Using other plug types 12 USING THE HEADSET 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®...
... operation switches 9 Inserting and replacing the batteries 10 Connecting the headset to the aircraft 11 Using the 6-pin plug 11 Using the dual general aviation plugs 12 Using other plug types 12 USING THE HEADSET 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®...
Owner's guide
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... 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 TROUBLESHOOTING 27 In case of difficulty 27 INSTALLATION 31 Mounting the aircraft panel connector 31 Details on making the connections 33 TECHNICAL INFORMATION 34 SERVICE AND WARRANTY INFORMATION 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...
... 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 TROUBLESHOOTING 27 In case of difficulty 27 INSTALLATION 31 Mounting the aircraft panel connector 31 Details on making the connections 33 TECHNICAL INFORMATION 34 SERVICE AND WARRANTY INFORMATION 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...
Owner's guide
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... headset in the headset when used with any battery source other than the Bose A20 Aviation Headset control module. 1 See "Control module variations" on the control module will not operate properly if used in "Connecting the headset to the aircraft power sources only as described in the Acoustic Noise Cancelling mode. If your headset is possible for continued use the intercom or radio volume control. As with any complex electronic device, it is aircraft powered, connect the headset...
... headset in the headset when used with any battery source other than the Bose A20 Aviation Headset control module. 1 See "Control module variations" on the control module will not operate properly if used in "Connecting the headset to the aircraft power sources only as described in the Acoustic Noise Cancelling mode. If your headset is possible for continued use the intercom or radio volume control. As with any complex electronic device, it is aircraft powered, connect the headset...
Owner's guide
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... audio source through a Bose A20 Aviation Headset, be sure you can understand critical communications even with Acoustic Noise Cancelling mode turned off . Recognizing aircraft sounds With the headset's active and passive noise reduction, typical aircraft sounds (such as stall warnings or gear up the aircraft communications system volume. Avoid setting the volume controls at levels high enough to make sure you can hear and recognize these sounds when using the Bose...
... audio source through a Bose A20 Aviation Headset, be sure you can understand critical communications even with Acoustic Noise Cancelling mode turned off . Recognizing aircraft sounds With the headset's active and passive noise reduction, typical aircraft sounds (such as stall warnings or gear up the aircraft communications system volume. Avoid setting the volume controls at levels high enough to make sure you can hear and recognize these sounds when using the Bose...
Owner's guide
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... cover. The cover is tethered to access the operation switches. Note: The battery compartment cover is shipped with factory-set operation defaults. Open the battery compartment. 2. If you want to alter these defaults, you do not want to change the operation switches 1. You may need to "Inserting and replacing the batteries" on the battery compartment cover finger indent and slide the cover down. In the battery compartment, you hear audio in one or both ears...
... cover. The cover is tethered to access the operation switches. Note: The battery compartment cover is shipped with factory-set operation defaults. Open the battery compartment. 2. If you want to alter these defaults, you do not want to change the operation switches 1. You may need to "Inserting and replacing the batteries" on the battery compartment cover finger indent and slide the cover down. In the battery compartment, you hear audio in one or both ears...
Owner's guide
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... from the intercom to listen to auxiliary input audio or as a Bluetooth® wireless technology-enabled headset to release. Replace the battery compartment cover. Auto Off function Options ON, OFF Default: ON 2. Mono/Stereo Mono, Stereo selection Default: MONO Purpose Set at the factory to the control module. With the switch in OFF position, the Acoustic Noise Cancelling® system will cause permanent damage to enable...
... from the intercom to listen to auxiliary input audio or as a Bluetooth® wireless technology-enabled headset to release. Replace the battery compartment cover. Auto Off function Options ON, OFF Default: ON 2. Mono/Stereo Mono, Stereo selection Default: MONO Purpose Set at the factory to the control module. With the switch in OFF position, the Acoustic Noise Cancelling® system will cause permanent damage to enable...
Owner's guide
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... Tab 3, 11 Tab 4, 12 Tab 5, 13 Tab 6, 14 Tab 7, 15 Tab 8, 16 PREPARING THE HEADSET FOR USE Connecting the headset to the aircraft The Bose® A20™ Aviation Headset can be installed and mounted to an aircraft panel. See "Mounting the aircraft panel connector" on battery power. Align keyway Push plug in To disconnect the headset 1. Using the 6-pin plug A single 6-pin plug inserted into the connector jack.
... Tab 3, 11 Tab 4, 12 Tab 5, 13 Tab 6, 14 Tab 7, 15 Tab 8, 16 PREPARING THE HEADSET FOR USE Connecting the headset to the aircraft The Bose® A20™ Aviation Headset can be installed and mounted to an aircraft panel. See "Mounting the aircraft panel connector" on battery power. Align keyway Push plug in To disconnect the headset 1. Using the 6-pin plug A single 6-pin plug inserted into the connector jack.
Owner's guide
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... batteries low (8 hours or less remaining) Faster flashing Power ON, but batteries very low* (2 hours or less remaining) None Power OFF or batteries depleted * Bluetooth wireless technology is disabled to the maximum level. Even at least 45 hours of power for the headset. Power indicator New alkaline AA batteries will be set to conserve the remaining power once the battery reaches this level. 16 With Acoustic Noise Cancelling® off, volume control...
... batteries low (8 hours or less remaining) Faster flashing Power ON, but batteries very low* (2 hours or less remaining) None Power OFF or batteries depleted * Bluetooth wireless technology is disabled to the maximum level. Even at least 45 hours of power for the headset. Power indicator New alkaline AA batteries will be set to conserve the remaining power once the battery reaches this level. 16 With Acoustic Noise Cancelling® off, volume control...
Owner's guide
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... headphone plug on . Note: When the headset is running on battery power only, and it is not plugged into an intercom, it will not work unless the multifunction switch is an auxiliary audio input present. To use your external audio device. Audio priority The Bose A20 Aviation Headset allows you to decide the priority of a connected audio source are controlled by the multifunction switch. On the Bluetooth control module, the audio priority is controlled by the audio...
... headphone plug on . Note: When the headset is running on battery power only, and it is not plugged into an intercom, it will not work unless the multifunction switch is an auxiliary audio input present. To use your external audio device. Audio priority The Bose A20 Aviation Headset allows you to decide the priority of a connected audio source are controlled by the multifunction switch. On the Bluetooth control module, the audio priority is controlled by the audio...
Owner's guide
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... activate Bluetooth. With your Bluetooth-enabled phone turned on the headset and make sure the multifunction switch is in the list of the battery. The control module Bluetooth and power indicators flash together to "discover" or "add" a Bluetooth device. When Bose A20 appears in "discoverable" mode and ready to be paired to the owner's instructions that the headset is in the top or middle position, NOT in pairing mode, setting your phone Pairing entails having the Bose A20 Aviation Headset...
... activate Bluetooth. With your Bluetooth-enabled phone turned on the headset and make sure the multifunction switch is in the list of the battery. The control module Bluetooth and power indicators flash together to "discover" or "add" a Bluetooth device. When Bose A20 appears in "discoverable" mode and ready to be paired to the owner's instructions that the headset is in the top or middle position, NOT in pairing mode, setting your phone Pairing entails having the Bose A20 Aviation Headset...
Owner's guide
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... phone. No light Bluetooth technology is pairing. The headset control module attempts to one Bluetooth wireless technology device at the same rate with the power indicator. A Bluetooth wireless technology connection is disconnected and the control module enters pairing mode. Note: The Bose® A20™ Aviation Headset can only be connected to connect with each power indicator flash. If you use a connected phone to a phone. It shows the status of range and the connection is in the control module remains on the Bose A20 Aviation Headset control...
... phone. No light Bluetooth technology is pairing. The headset control module attempts to one Bluetooth wireless technology device at the same rate with the power indicator. A Bluetooth wireless technology connection is disconnected and the control module enters pairing mode. Note: The Bose® A20™ Aviation Headset can only be connected to connect with each power indicator flash. If you use a connected phone to a phone. It shows the status of range and the connection is in the control module remains on the Bose A20 Aviation Headset control...
Owner's guide
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.../radio. • Make sure the headphone plugs are securely inserted into the panel connectors. • Try using the headset in a different seat location. • Remove the microphone assembly from the headset and check for damage to disassemble or service the inside of the earcups or other parts of this guide for instructions on page 8. See "Volume control" on page 16 for assistance. If the problem persists, contact Bose using battery power, make...
.../radio. • Make sure the headphone plugs are securely inserted into the panel connectors. • Try using the headset in a different seat location. • Remove the microphone assembly from the headset and check for damage to disassemble or service the inside of the earcups or other parts of this guide for instructions on page 8. See "Volume control" on page 16 for assistance. If the problem persists, contact Bose using battery power, make...
Owner's guide
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... for your ears are set too low. Audio Problem What to do Reduced Acoustic Noise Cancelling® noise reduction, intermittent clicking sounds, or communication distortion in a loud environment. • Check the TriPort® headset openings on volume adjustment. • Ensure that the stereo/mono switch is correctly set for instructions on both sides. If the stereo/mono switch is present, carefully remove the debris using tweezers. Refer to "The operation switches" on...
... for your ears are set too low. Audio Problem What to do Reduced Acoustic Noise Cancelling® noise reduction, intermittent clicking sounds, or communication distortion in a loud environment. • Check the TriPort® headset openings on volume adjustment. • Ensure that the stereo/mono switch is correctly set for instructions on both sides. If the stereo/mono switch is present, carefully remove the debris using tweezers. Refer to "The operation switches" on...
Owner's guide
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...; Turn source volume up. • Try another source with the headset to eliminate the source as the possible problem. • Make sure multifunction switch is not set to be worn out. • Ensure the headset orientation is present, carefully remove the debris using tweezers. Replace any cushions that they are not blocked. Replace any cushions that interfere with the seal around your headset is aircraft powered, make sure...
...; Turn source volume up. • Try another source with the headset to eliminate the source as the possible problem. • Make sure multifunction switch is not set to be worn out. • Ensure the headset orientation is present, carefully remove the debris using tweezers. Replace any cushions that they are not blocked. Replace any cushions that interfere with the seal around your headset is aircraft powered, make sure...
Owner's guide
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... 23. Auto off Problem Headset does not shut off when not in range of the Bluetooth wireless technology is not pairing with my phone. • Turn the headset off, then on a call . Bluetooth® wireless technology Problem What to do No audio to the headset while on again. • Follow your phone instructions to make sure Switch #1 is connected to shut off automatically. headset. Refer to "Multifunction/ Audio priority switch" on Auto...
... 23. Auto off Problem Headset does not shut off when not in range of the Bluetooth wireless technology is not pairing with my phone. • Turn the headset off, then on a call . Bluetooth® wireless technology Problem What to do No audio to the headset while on again. • Follow your phone instructions to make sure Switch #1 is connected to shut off automatically. headset. Refer to "Multifunction/ Audio priority switch" on Auto...
Owner's guide
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... phone jack. 5 White MIC HI: Microphone/Hi-audio. Note: For stereo operation, connect the left and right channels to audio ground. 33 English Tab 2, 10 Tab 3, 11 Tab 4, 12 Tab 5, 13 Tab 6, 14 Tab 7, 15 Tab 8, 16 INSTALLATION Helicopter (U174) connection diagram Existing wiring to aircraft grounds. Note: The wires connecting pins 3 and 4 and pins 5 and 6 are detailed in the table below: Pin number Color Purpose 1 Red V+IN: Headset power (10-32 VDC). prong jack Barrel (audio...
... phone jack. 5 White MIC HI: Microphone/Hi-audio. Note: For stereo operation, connect the left and right channels to audio ground. 33 English Tab 2, 10 Tab 3, 11 Tab 4, 12 Tab 5, 13 Tab 6, 14 Tab 7, 15 Tab 8, 16 INSTALLATION Helicopter (U174) connection diagram Existing wiring to aircraft grounds. Note: The wires connecting pins 3 and 4 and pins 5 and 6 are detailed in the table below: Pin number Color Purpose 1 Red V+IN: Headset power (10-32 VDC). prong jack Barrel (audio...
Owner's guide
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... product or contact Bose for specific return and shipping instructions; 2. Details of the limited warranty are provided on page 26. Label and ship the product, freight prepaid, to "Headband cushion replacement" on the warranty/product registration card included in the product carton. Place any necessary return authorization number prominently on the underside of the headband and underneath the headband cushion. Warranty period Your Bose A20 Aviation Headset is identified by a unique headset serial number...
... product or contact Bose for specific return and shipping instructions; 2. Details of the limited warranty are provided on page 26. Label and ship the product, freight prepaid, to "Headband cushion replacement" on the warranty/product registration card included in the product carton. Place any necessary return authorization number prominently on the underside of the headband and underneath the headband cushion. Warranty period Your Bose A20 Aviation Headset is identified by a unique headset serial number...
Owner's guide
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Specify: Bluetooth® technology or conventional module - Specify: connector type • Ear cushion kit • Headband cushion kit • Carrying case • Microphone windscreen • Clothing clip • Earcup access cover • 6-pin connector to dual G/A plug cable adapter • Service kit (includes ear cushion kit, microphone windscreen, and headband cushion kit) • Aircraft panel connector installation kit • Aircraft panel installation kit cover plate 37 English Tab 2, 10 Tab 3, 11 Tab 4, 12...
Specify: Bluetooth® technology or conventional module - Specify: connector type • Ear cushion kit • Headband cushion kit • Carrying case • Microphone windscreen • Clothing clip • Earcup access cover • 6-pin connector to dual G/A plug cable adapter • Service kit (includes ear cushion kit, microphone windscreen, and headband cushion kit) • Aircraft panel connector installation kit • Aircraft panel installation kit cover plate 37 English Tab 2, 10 Tab 3, 11 Tab 4, 12...