Owners Guide
Page 2
... loud noise. If your ability to hear surrounding sounds may be below the detectable threshold or may cause a fire or chemical burn if mishandled. English Do not recharge, disassemble, heat, or incinerate. • When a replacement is turned up warnings) will void the limited product warranty. 2 - Save this owner's guide carefully. As with the Bose® A20® Aviation Headset. • Make sure AUX source volume is needed, use...
... loud noise. If your ability to hear surrounding sounds may be below the detectable threshold or may cause a fire or chemical burn if mishandled. English Do not recharge, disassemble, heat, or incinerate. • When a replacement is turned up warnings) will void the limited product warranty. 2 - Save this owner's guide carefully. As with the Bose® A20® Aviation Headset. • Make sure AUX source volume is needed, use...
Owners Guide
Page 3
... used in water or any battery source other repair seems necessary, contact Bose Technical Support. Frequency band of the following two conditions: (1) This device may cause undesired operation. Proper headset operation requires that to ensure clear communications. from that the headset TriPort® and microphone openings located on page 42. These limits are incorrectly replaced with AA alkaline batteries (IEC LR06). Maximum transmit power less than the Bose A20 Aviation Headset control...
... used in water or any battery source other repair seems necessary, contact Bose Technical Support. Frequency band of the following two conditions: (1) This device may cause undesired operation. Proper headset operation requires that to ensure clear communications. from that the headset TriPort® and microphone openings located on page 42. These limits are incorrectly replaced with AA alkaline batteries (IEC LR06). Maximum transmit power less than the Bose A20 Aviation Headset control...
Owners Guide
Page 4
... with your local municipality, disposal service, or the shop where you bought this product within the temperature range of such marks by Bose Corporation is located beneath the headband cushion (see page 41). Phone Number: +5255 (5202) 3545 UK Importer: Bose Limited, Bose House, Quayside Chatham Maritime, Chatham, Kent, ME4 4QZ, United Kingdom Operate this product. No part of Toxic or Hazardous Substances...
... with your local municipality, disposal service, or the shop where you bought this product within the temperature range of such marks by Bose Corporation is located beneath the headband cushion (see page 41). Phone Number: +5255 (5202) 3545 UK Importer: Bose Limited, Bose House, Quayside Chatham Maritime, Chatham, Kent, ME4 4QZ, United Kingdom Operate this product. No part of Toxic or Hazardous Substances...
Owners Guide
Page 5
...; A20® Aviation Headset 7 Our commitment to you...7 What's included...7 Components...8 Control module variations 9 Power and cable variations 10 Preparing the Headset for Use 11 The microphone assembly...11 Attaching the microphone assembly 11 The battery compartment...12 Opening the battery compartment 12 The operation switches 12 Changing the operation switches 12 Auto On...13 Auto Off ...13 Inserting and replacing the batteries 14 Connecting the headset to the aircraft 14 Using the 6-pin plug...
...; A20® Aviation Headset 7 Our commitment to you...7 What's included...7 Components...8 Control module variations 9 Power and cable variations 10 Preparing the Headset for Use 11 The microphone assembly...11 Attaching the microphone assembly 11 The battery compartment...12 Opening the battery compartment 12 The operation switches 12 Changing the operation switches 12 Auto On...13 Auto Off ...13 Inserting and replacing the batteries 14 Connecting the headset to the aircraft 14 Using the 6-pin plug...
Owners Guide
Page 6
... screen...28 Headband cushion...28 Replacing parts...28 Microphone windscreen replacement 28 Ear cushion replacement 29 Battery replacement...29 Headband cushion replacement 30 Microphone assembly or terminator cover replacement 30 Storage...30 Troubleshooting 31 Installation 36 Mounting the aircraft panel connector 36 Technical Information 37 Mono connection diagram 37 Stereo connection diagram 37 Helicopter (U174) connection diagram 38 Details on making the connections 38 FAA Technical Standards Order 40 Warranty and Service Information 41 Locating the headset serial number 41...
... screen...28 Headband cushion...28 Replacing parts...28 Microphone windscreen replacement 28 Ear cushion replacement 29 Battery replacement...29 Headband cushion replacement 30 Microphone assembly or terminator cover replacement 30 Storage...30 Troubleshooting 31 Installation 36 Mounting the aircraft panel connector 36 Technical Information 37 Mono connection diagram 37 Stereo connection diagram 37 Helicopter (U174) connection diagram 38 Details on making the connections 38 FAA Technical Standards Order 40 Warranty and Service Information 41 Locating the headset serial number 41...
Owners Guide
Page 7
... the price range of control module and connector configuration depends on the options you chose for the headset. At Bose, we do, to you can also connect the headset to secondary audio sources such as we are several end-plug configurations for your Bose® A20® Aviation Headset With the Bose® A20® Aviation Headset, you We take great pride in designing each of the product...
... the price range of control module and connector configuration depends on the options you chose for the headset. At Bose, we do, to you can also connect the headset to secondary audio sources such as we are several end-plug configurations for your Bose® A20® Aviation Headset With the Bose® A20® Aviation Headset, you We take great pride in designing each of the product...
Owners Guide
Page 10
... Power and cable variations The Bose® A20® Aviation Headset is available for purchase in different standard aircraft connector options, including: Battery powered options Operate with battery power only Dual G/A U174 U384 Dual powered options Operate with either aircraft or battery power No battery needed when connected to aircraft power 6-pin* 5-pin XLR 8-pin * An adapter is available from Bose to convert a 6-pin connector to a dual G/A or U174 plug for more information. 10 - Contact Bose Technical Support...
... Power and cable variations The Bose® A20® Aviation Headset is available for purchase in different standard aircraft connector options, including: Battery powered options Operate with battery power only Dual G/A U174 U384 Dual powered options Operate with either aircraft or battery power No battery needed when connected to aircraft power 6-pin* 5-pin XLR 8-pin * An adapter is available from Bose to convert a 6-pin connector to a dual G/A or U174 plug for more information. 10 - Contact Bose Technical Support...
Owners Guide
Page 12
... for Bluetooth headsets. Opening the battery compartment Press down . Note: The battery compartment cover is tethered to remain securely closed. and Auto Off feature. Changing the operation switches 1. English Do not attempt to gently move the switch. 12 - Open the battery compartment. 2. Preparing the Headset for Use The battery compartment The headset is only available for headset configurations that support two-channel or stereo intercom systems...
... for Bluetooth headsets. Opening the battery compartment Press down . Note: The battery compartment cover is tethered to remain securely closed. and Auto Off feature. Changing the operation switches 1. English Do not attempt to gently move the switch. 12 - Open the battery compartment. 2. Preparing the Headset for Use The battery compartment The headset is only available for headset configurations that support two-channel or stereo intercom systems...
Owners Guide
Page 13
... give the wired connection higher priority. Select BT to turn on battery power and is available. For most configurations, set the switch position to complete your aircraft has a stereo intercom. The headset will turn on page 26. If you stop using the headset. Set at the factory to preserve battery power. Operation Switch Purpose PRIORITY (Available for Bluetooth® headsets only) INTERCOM (Available for headset configurations that support two-channel...
... give the wired connection higher priority. Select BT to turn on battery power and is available. For most configurations, set the switch position to complete your aircraft has a stereo intercom. The headset will turn on page 26. If you stop using the headset. Set at the factory to preserve battery power. Operation Switch Purpose PRIORITY (Available for Bluetooth® headsets only) INTERCOM (Available for headset configurations that support two-channel...
Owners Guide
Page 14
... release. Warning: Replace batteries with aircraft power and intercom audio. Firmly press the plug into aircraft power or rely entirely on page 36. Turn off headset power. 2. Insert two alkaline AA batteries into the 6-pin connector provides the headset with alkaline batteries only. Do not use any other connector types. Using the 6-pin plug A single 6-pin plug inserted into the control module, observing proper polarity. 4. Note: An adapter is aircraft-powered, a 6-pin connector may...
... release. Warning: Replace batteries with aircraft power and intercom audio. Firmly press the plug into aircraft power or rely entirely on page 36. Turn off headset power. 2. Insert two alkaline AA batteries into the 6-pin connector provides the headset with alkaline batteries only. Do not use any other connector types. Using the 6-pin plug A single 6-pin plug inserted into the control module, observing proper polarity. 4. Note: An adapter is aircraft-powered, a 6-pin connector may...
Owners Guide
Page 19
... Battery Flashing Power ON and batteries good Amber Battery Fast flashing Power ON, but batteries low (8 hours or less remaining) Red Battery Very fast Power ON, but batteries very low* flashing (2 hours or less remaining) Off None None Power OFF or batteries depleted Warning: Replace batteries with the ambient noise level of the aircraft, temperature, ear cushion condition, use any other battery chemistries. *When the batteries reach this level, the Bluetooth feature is turning off. Intercom volume controls...
... Battery Flashing Power ON and batteries good Amber Battery Fast flashing Power ON, but batteries low (8 hours or less remaining) Red Battery Very fast Power ON, but batteries very low* flashing (2 hours or less remaining) Off None None Power OFF or batteries depleted Warning: Replace batteries with the ambient noise level of the aircraft, temperature, ear cushion condition, use any other battery chemistries. *When the batteries reach this level, the Bluetooth feature is turning off. Intercom volume controls...
Owners Guide
Page 21
... indicates successful connection. To turn on the headset, it will automatically go into p airing mode and the Bluetooth indicator will attempt to turn on page 24. Press to reconnect with a Bluetooth® device Pairing the first device 1. Bose A20 The Bluetooth indicator flashes blue while the devices are turned off, or out of range, the headset will only happen the first time you turn off. Make sure the Secondary Audio Mode selector...
... indicates successful connection. To turn on the headset, it will automatically go into p airing mode and the Bluetooth indicator will attempt to turn on page 24. Press to reconnect with a Bluetooth® device Pairing the first device 1. Bose A20 The Bluetooth indicator flashes blue while the devices are turned off, or out of range, the headset will only happen the first time you turn off. Make sure the Secondary Audio Mode selector...
Owners Guide
Page 27
Triport headset opening Microphone opening must be performed by Bose or an authorized repair facility. With normal use it. If cleaning or replacement of debris. All other care and maintenance, in water or any other liquid. Cleaning the headset General cleaning Gently wipe the outside surfaces of the headband, connectors, plastic parts, and headband cushion, using a soft cloth moistened with water and mild soap. Do not blow air...
Triport headset opening Microphone opening must be performed by Bose or an authorized repair facility. With normal use it. If cleaning or replacement of debris. All other care and maintenance, in water or any other liquid. Cleaning the headset General cleaning Gently wipe the outside surfaces of the headband, connectors, plastic parts, and headband cushion, using a soft cloth moistened with water and mild soap. Do not blow air...
Owners Guide
Page 31
...;correctly installed. Do not use any other parts of the headset. Intercom communications Problem Acoustic Noise Cancelling noise reduction, but no communication • Make sure the headphone plugs are replaceable by the user. If the problem persists, contact Bose using the headset in a different seat location. • Remove the microphone assembly from the headset and check for damage to the connector or pins. Only the boom microphone cable, access cover, batteries, windscreen, headband cushion, and ear cushions are securely...
...;correctly installed. Do not use any other parts of the headset. Intercom communications Problem Acoustic Noise Cancelling noise reduction, but no communication • Make sure the headphone plugs are replaceable by the user. If the problem persists, contact Bose using the headset in a different seat location. • Remove the microphone assembly from the headset and check for damage to the connector or pins. Only the boom microphone cable, access cover, batteries, windscreen, headband cushion, and ear cushions are securely...
Owners Guide
Page 32
... communication • Make sure the headset is set too low. Troubleshooting Problem What to do • On the outside of communications while in the Acoustic Noise Cancelling mode, turn off the power switch. Refer to "Ear cushion replacement" on page 19. • On the intercom/radio, make sure the Intercom (MON-ST) switch is present, carefully remove the debris using tweezers. The headset will play audio on page 12...
... communication • Make sure the headset is set too low. Troubleshooting Problem What to do • On the outside of communications while in the Acoustic Noise Cancelling mode, turn off the power switch. Refer to "Ear cushion replacement" on page 19. • On the intercom/radio, make sure the Intercom (MON-ST) switch is present, carefully remove the debris using tweezers. The headset will play audio on page 12...
Owners Guide
Page 33
... in the passive noise reducing mode. The headset's low-force design makes it sensitive to create a better seal on your ear. The low-force design of each earcup to ensure that a hat or eyeglasses with thick temples do not interfere with the seal. • If the squealing or whistling sound persists, turn off the power switch and contact Bose for service as soon as...
... in the passive noise reducing mode. The headset's low-force design makes it sensitive to create a better seal on your ear. The low-force design of each earcup to ensure that a hat or eyeglasses with thick temples do not interfere with the seal. • If the squealing or whistling sound persists, turn off the power switch and contact Bose for service as soon as...
Owners Guide
Page 35
... a call Headset does not reconnect to a previously connected device What to do • Inside the battery compartment, make sure the Auto On (ON-OFF) switch is set to ON. Troubleshooting Bluetooth® audio source Problem No audio from each other). • On the control module, make sure the Bluetooth volume is turned up . • Disconnect the headset from your phone is properly paired and connected to the headset.
... a call Headset does not reconnect to a previously connected device What to do • Inside the battery compartment, make sure the Auto On (ON-OFF) switch is set to ON. Troubleshooting Bluetooth® audio source Problem No audio from each other). • On the control module, make sure the Bluetooth volume is turned up . • Disconnect the headset from your phone is properly paired and connected to the headset.
Owners Guide
Page 38
... microphone jack that corresponds to the existing audio ground. 3 White COMM L: Phone communication: Left. 4 Blue COMM R: Phone communication: Right. Technical Information Helicopter (U174) connection diagram Existing wiring to auto sensing systems found in the table below: Pin number Color Purpose 1 Red V+IN: Headset power (10-32 VDC). Details on radio transmit but not through the intercom, check pin 6. Note: If the microphone works on making the connections The pinouts for the optional installed...
... microphone jack that corresponds to the existing audio ground. 3 White COMM L: Phone communication: Left. 4 Blue COMM R: Phone communication: Right. Technical Information Helicopter (U174) connection diagram Existing wiring to auto sensing systems found in the table below: Pin number Color Purpose 1 Red V+IN: Headset power (10-32 VDC). Details on radio transmit but not through the intercom, check pin 6. Note: If the microphone works on making the connections The pinouts for the optional installed...
Owners Guide
Page 41
... ship the product, freight prepaid, to register. Serial number Headband cushion Limited warranty The headset is covered by a unique headset serial number located on how to the address provided by pressing down firmly. Please refer to the card for technical support. Details of the limited w arranty are provided on the product registration card that is in your product or contact Bose for instructions on the...
... ship the product, freight prepaid, to register. Serial number Headband cushion Limited warranty The headset is covered by a unique headset serial number located on how to the address provided by pressing down firmly. Please refer to the card for technical support. Details of the limited w arranty are provided on the product registration card that is in your product or contact Bose for instructions on the...
Owners Guide
Page 42
... access cover • 6-pin connector to dual G/A plug cable adapter • 6-pin connector to U174 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 42 - English Service and Warranty Information Contact information Contact Bose for: • Spare parts and accessories • Technical advice • Installation information • Warranty and repair information In North America: Bose Technical Support 145...
... access cover • 6-pin connector to dual G/A plug cable adapter • 6-pin connector to U174 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 42 - English Service and Warranty Information Contact information Contact Bose for: • Spare parts and accessories • Technical advice • Installation information • Warranty and repair information In North America: Bose Technical Support 145...