Bose A30 User manual

A30 AVIATION HEADSET

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WHAT’S IN THE BOX
CONTENTS
Carry case
3.5 mm AUX audio cable
AA batteries (2)
Bose A30 Aviation Headset Control module holder
NOTES:
• For control module options, see page 17.
• For aircraft connector types, see page 34.
• If any part of the product is damaged, don’t use it. Contact your authorized
Bose dealer or Bose customer service.
Visit: support.Bose.com/A30support.Bose.com/A30

WHAT’S IN THE BOX
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HEADSET COMPONENTS
Headband
Earcup
Microphone assembly
(boom microphone,
microphone base,
and cable)
Cable clips
Control module
(see page 17)
Aircraft connectors
(see page 34)

WHAT’S IN THE BOX
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CONTROL MODULE OPTIONS
Intercom volume
controls (left/right)
Power light
Power button
Acoustic Noise
Cancelling switch
(see page 23)
Bluetooth light
Bluetooth/
Multi-function
button
Secondary Audio
Mode switch
(see page 40)
Bluetooth volume up H
Bluetooth volume down z
Conventional control moduleControl module with Bluetooth capability

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IMPORTANCE OF PROPER FIT
FIT THE HEADBAND
Proper fit is important both for comfort and optimal noise cancellation performance.
1. Locate the left Tand right Uicons inside the earcups to orient the
headset properly.
2. Place the headset on your head.
3. Adjust the headband so the ear cushions completely cover your ears.
NOTE: For best performance, make sure the ear cushions fit securely around your
ears so they create a seal.

IMPORTANCE OF PROPER FIT
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ADJUST THE MICROPHONE
1. Grasp the microphone base and adjust the boom so the microphone is level
with your mouth.
CAUTION: Microphone placement is important for clear communication.
The microphone boom can rotate 160°. Do NOT force it beyond
the intended rotation or damage could occur.

IMPORTANCE OF PROPER FIT
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2. Make sure the microphone is 0.5" (12.7 mm) from your lips.
NOTE: The microphone should not be touching your lips.
0.5"
12.7 mm
3. Make sure the white dot on the microphone base faces your mouth.
NOTE: If needed, twist the microphone base.
4. Test the headset before flight.

IMPORTANCE OF PROPER FIT
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IMPORTANCE OF PROPER FIT
CONDITIONS RELATED TO FIT
In very loud conditions, such as during takeo, you may experience a brief reduction
in noise cancellation as the headset compensates for a momentary pressure
change. If this continues when the sound level returns to normal, see “Acoustic Noise
Cancelling” on page 23. If it persists, see “Troubleshooting” on page 54.
A low rumbling sound or frequent, brief losses of noise cancellation may indicate
an improper fit or blocked earcup openings. See “Clean the headset” on page 48
for instructions on removing blockages.
During a long flight, you may feel a slight pressure point, which can be relieved by
adjusting the headband position.
SECURE THE CABLE AND CONTROL MODULE
The cable clips and control module holder secure the cable and control module to
your clothing, a safety harness, sun visor rail, or aircraft headset hook for quick and
easy access.
Cable clips
Squeeze the narrow end of the clip to open. Press the side button to release and
reposition the clip along the cable.
Side button
Control module holder
Stretch the holder over the back of the control module to secure it in place.

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HEADSET CONTROLS
POWER ON
Press the Power button I.
The Power light glows amber then blinks according to the battery level.
See “Power light” on page 36.
NOTE: The first time you power on your headset, noise cancellation is fully enabled.
See “Acoustic Noise Cancelling” on page 23.
POWER OFF
Press and hold Iuntil the Power light glows amber, then release.
NOTE: When powered o, the headset provides passive audio communications.

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ACOUSTIC NOISE CANCELLING
Acoustic Noise Cancelling reduces unwanted noise, providing a clearer, more
lifelike audio performance. You can choose your noise cancellation level based on
your listening preferences and environment.
NOTE: When you receive a call, the headset remains at the current noise
cancellation level.
ACOUSTIC NOISE CANCELLING (ANC) SWITCH
Sets the noise cancellation level.
FUNCTION POSITION DESCRIPTION
HIGH
Maximum quiet and noise cancellation across the entire
spectrum. Best signal-to-noise ratio for radio and intercom
communications in loud aircraft.
MED
Consistent noise reduction across a wide range of
frequencies. Best for clear and comfortable noise
cancellation in typical jet aircraft.
LOW Best for improved interpersonal communication outside
of the intercom in quieter environments.

ACOUSTIC NOISE CANCELLING
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TAP CONTROL FOR TALK-THROUGH COMMUNICATION
When you need to focus on interpersonal communication coming from a specific
direction, you can automatically set noise cancellation to LOW in one earcup.
NOTES:
• By default, the TAP CONTROL operation switch is set to OFF.
• Tap Control is available only when the Acoustic Noise Cancelling (ANC) switch is in
the HIGH or MED position.
• Tap Control is disabled during extreme levels of ambient noise to ensure proper
noise reduction performance and intercom communication quality. However, you
can still set the noise cancellation level to LOW in both earcups using the Acoustic
Noise Cancelling (ANC) switch (see page 23).
1. Make sure the Acoustic Noise Cancelling (ANC) switch is in the HIGH or
MED position.
2. Inside the control module battery compartment, set the TAP CONTROL switch to
ON. See “Change the operation switches” on page 28.
3. Firmly double-tap the outside of the earcup.
2x

ACOUSTIC NOISE CANCELLING
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Switch earcups
To switch Tap Control to the other earcup, firmly double tap the other earcup.
Reset Tap Control
To resume noise cancellation in both earcups, double-tap the earcup where Tap
Control is currently active, or move the Acoustic Noise Cancelling (ANC) switch to
another position.

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OPERATION SWITCHES
OPERATION SWITCH FUNCTIONS
The operation switches are located in the control module battery compartment.
NOTE: Some operation switches are not available on all models.
FUNCTION POSITION DEFAULT DESCRIPTION
REVERSIONARY OFF
Disables all non-critical functions, including
Bluetooth audio, AUX audio, and Tap Control.
Only intercom communications and Acoustic
Noise Cancelling are enabled.
In case of emergency hardware or software
failure, set the switch to ON.
For more information, see page 59.
TAP CONTROL OFF Enables/Disables Tap Control feature
(see page 24).
PRIORITY BT
Establishes priority between two secondary
audio sources connected at the same time.
Select BT to give the Bluetooth (wireless)
connection higher priority.
Select AUX to give the wired connection
higher priority.
For more information, see page 46.

OPERATION SWITCHES
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FUNCTION POSITION DEFAULT DESCRIPTION
INTERCOM MONO
Processes intercom audio as mono or stereo.
Available for configurations that support
two-channel or stereo intercom systems only.
NOTE: 5-pin XLR and U174 models are
mono-only configurations.
AUTO OFF ON
Power o automatically after 3 to 45
minutes of inactivity.
NOTES:
• When running on battery power and
unplugged from the intercom, the headset
powers o unless there is audio from an
active mobile device present.
• If you are on a call and unplugged from
the intercom, the headset powers o
approximately 3 minutes after the call
is ended.
AUTO ON ON
Power on automatically when connected to
aircraft power.
NOTES:
• Available in Flex Power models only
(see page 34).
• Bluetooth models return to the previous
Bluetooth state when powered on.

OPERATION SWITCHES
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CHANGE THE OPERATION SWITCHES
1. Power o the headset (see page 22).
2. On the back of the control module, press down firmly on the finger indent and
slide the cover down.
CAUTION: The battery cover is tethered to the control module. Do NOT attempt
to detach it.
3. Remove the batteries.
4. Using a pen or a small, flat-tipped screwdriver, gently move the switch(es).

OPERATION SWITCHES
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5. Insert two AA batteries (alkaline preferred), observing proper polarity.
CAUTION: If the batteries don’t fit correctly, do NOT force them in. Forcing
an improper connection will cause permanent damage to the
control module.
6. Close the battery cover, press firmly down on the finger indent, and slide the
cover into place.

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MICROPHONE PLACEMENT
By default, the microphone assembly ships from the factory attached to the left
earcup (although in some configurations it may ship unattached). It can be easily
moved from one earcup to the other.
Terminator
cover
Microphone
assembly
MOVE THE MICROPHONE
Remove the microphone assembly and terminator cover
1. At the base of the microphone assembly, open the two latches.
2. Gently pull the microphone assembly from the socket.

MICROPHONE PLACEMENT
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3. On the terminator cover, open the latch.
4. Gently pull the terminator cover from the socket.
Replace the microphone assembly and terminator cover
1. Align the base of the microphone assembly with the socket on the earcup and
slide in until secure.
2. At the base of the microphone assembly, close the two latches.
3. Align the terminator cover with the socket on the other earcup and slide in
until secure.
CAUTION: Do NOT force the terminator cover into the socket.
NOTE: If the terminator cover is not securely installed, there will be no
audio in the earcup.
4. On the terminator cover, close the latch.
5. Test the headset before flight.

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BATTERIES
REPLACE THE BATTERIES
When the battery light blinks red, the batteries must be replaced.
NOTE: For aircraft-powered headsets, batteries are not required for operation
if aircraft power is available. However, you can still install batteries when
connected to aircraft power as a backup in case of power interruptions or
disconnections. See “Aircraft Connectors” on page 34.
1. Power o the headset (see page 22).
2. On the back of the control module, press down firmly on the finger indent and
slide the cover down.
CAUTION: The battery cover is tethered to the control module. Do NOT attempt
to detach it.
3. Remove the batteries.

BATTERIES
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4. Insert two AA batteries (alkaline preferred), observing proper polarity.
CAUTION: If the batteries don’t fit correctly, do NOT force them in. Forcing
an improper connection will cause permanent damage to the
control module.
5. Close the battery cover, press firmly down on the finger indent, and slide the
cover into place.
NOTES:
• New AA alkaline batteries supply up to 45 hours of power for the headset.
Battery life varies with the ambient noise level of the aircraft, temperature,
ear cushion condition, Bluetooth feature use, and age of the batteries.
• Other battery chemistries may yield dierent results. Battery life may dier and
battery life indication may not be accurate.