Bose Aviation Headset X E User Manual

							 
11 
Getting Your Headset Ready for Use 
note the important markings for left (L) and right (R) above each ear-
cup. These markings indicate which ear each earcup is intended to 
fit over. 
Removing an attached boom microphone cable 
1. Use a flat-tipped screwdriver to loosen the two screws at the 
base of the boom microphone cable assembly.
2. Pull the cable assembly straight out from the earcup to which it 
is attached (Figure 6). 
CAUTION:  
Do not twist the boom microphone cable while discon-
necting it. Twisting can damage the connector pins. 
Figure 6 
Pulling the cable assembly 
straight out from the earcup 
Attaching the boom microphone cable 
Before you attach the boom microphone, make sure that the cable 
connector and its earcup connector are clean and free of debris. 
1. Use a flat-tipped screwdriver to loosen the two screws on the 
access cover near the bottom of the earcup where you want to 
attach the boom microphone. 
2. Remove the cover to reveal the connector pins on the earcup.
3. Carefully line up the connector to the small connector pins on 
the panel (Figure 7 on page 12).  
CAUTION:  
An improperly aligned connector will not make the con-
nections neccessary for proper operation, and may cause damage.
Access 
coverConnector 
pins
Cable 
assembly
Connector 
pins
L for left 
						

							 
12 
Getting Your Headset Ready for Use 
Figure 7 
Positioning the mic cable 
assembly on the preferred 
earcup 
4. Press the assembly onto the connector pins until it is fully 
engaged and the cable assembly is flush with the earcup. 
CAUTION:  
Do not apply excessive force, which may result in earcup 
damage. 
5. With the screw threads properly aligned, tighten the screws.
6. Rotate the microphone boom into position so it will be near your 
mouth when you put on the headset. The label should be facing 
your lips.
7. Attach the access cover to the connector panel on the earcup 
that does not have the boom mic attached. Align the screws and 
tighten them to secure the cover.
•If you moved the boom mic from one earcup to the other, reuse 
the access cover you removed earlier. 
CAUTION:  
Be sure to try the headset and test its operation before 
flight. 
Clothing clip 
Use the clothing clip (Figure 8) for attaching the control module to 
your clothing, a safety harness, or an aircraft door pocket. Pressing 
on the end of the clip allows you to reposition it along the cable. 
Figure 8 
Moving the clothing clip 
along the cable 
CAUTION:  
Do not attempt to clip onto surfaces that are more than  
1
/
 
4
 
-inch thick. 
Connector 
pins
Access 
cover
Cable 
assembly Connector 
pins
L for left
Press to release 
						

							 
13 
Getting Your Headset Ready for Use
Preparing to use battery power 
The battery compartment on your headset control model serves two 
purposes. In addition to holding the batteries, it contains small 
switches (Figure 9) that give you the option to change some of the 
factory-set operation defaults for your headset.  
Figure 9 
Optional operation switches 
inside the battery compart-
ment 
Changing the optional operation switches 
Note:  
To change switch positions, use a pen or a small, flat-tipped 
screwdriver to gently switch the tab. 
•Switches 1- 3: Not currently used.
•Switch 4: Set at the factory to enable the smart shutoff function. To 
disable smart shutoff, set switch to OFF. With the switch in OFF 
position, the ANR system will not turn off until the power button is 
depressed and held for at least one second. 
Note:  
The smart shutoff function is designed to detect when the 
headset is not in use and shut off ANR to preserve battery power. 
Smart shutoff turns off circuitry several minutes after you remove the 
headset. 
•Switch 5: Set to A at the factory for operation with new headsets. 
Set it to B if you are installing a portable cable onto an older, exist-
ing Aviation Headset  that was manufactured before June, 2003. 
Note:  
If you cannot determine the manufacture date of your head-
set, refer to “Locate the serial number for your product registration 
card” on page 10. 
•Switch 6: Set at the factory for mono audio systems (to provide 
audio in both ears).
Set it for stereo (ST) if your aircraft has a stereo intercom.
123456 ON C & K S006AUDIO
Mono ST
CONFIG
B       AAUTO-OFF OFF  ON
UNUSED
UNUSED
UNUSED
123456 ON C & K S006AUDIO
Mono ST
CONFIG
B       AAUTO-OFF OFF  ON
UNUSED
UNUSED
UNUSED 
						

							 
14 
Getting Your Headset Ready for Use 
Inserting batteries 
Insert the two supplied alkaline AA batteries (IEC LR6) into the 
control module (Figure 10). 
Figure 10 
Installing the two batteries 
CAUTION:  
The battery compartment is designed to prevent inad-
vertent reverse polarity from installing the batteries incorrectly. If the 
batteries do not seem to fit correctly, do not force them in. Forcing an 
improper connection will cause permanent damage to the control 
module. 
Preparing the aircraft powered headset for use 
For an aircraft powered headset, the cable is permanently installed in 
the aircraft.  
CAUTION:  
The aircraft panel connector must be mounted by a 
mechanic qualified to perform this type of avionics installation for the 
aircraft you are using. 
If yours is an aircraft powered headset, there is a connector on a 6-
foot wiring harness that came in the carton. This self-latching, preci-
sion designed quick-connector is designed for panel mounting and 
mechanically keyed to ensure proper mating. 
Attaching and removing the cable 
When the quick-connector is installed, the cable leading from the 
control module connects to it. Match the narrow bar on the cable 
end to the slot on the connector. Press in until the two parts engage 
(Figure 11 on page 15).
To release the cable, pull back on the sleeve near the end of the 
cable. Then gently remove the cable from the connector.
+
AM270261_00 V.pdf  May 16 2003 
						

							 
15 
Getting Your Headset Ready for Use 
CAUTION:  
Do not attempt to pull the connector out without first pull-
ing back on the sleeve. Forcing the connector out will cause damage 
to the cable and/or your aircraft instrument panel. 
Figure 11 
Attaching and removing the 
cable 
Mounting the connector 
Mount the connector into a cutout, as shown in Figure 12 below. 
Connect the eight wires as follows: 
•Two for the microphone
•Two for audio
•One for power
•One for ground
•Two for audio shields
Audio and microphone wires should be connected to the back of the 
existing microphone and headphone jacks, leaving existing jacks 
intact for use with conventional headsets. This is usually the fastest 
installation method. Also refer to Figures 13-15 on page 18. 
Figure 12 
Harness connector and 
schematic
Slide sleeve 
to release Align keyway
PIN 6
12.6mm
.5
14.1mm
.56
RECEPTACLE - PINOUT (FRONT VIEW)
PIN 1
AIRCRAFT INTERFACE SCHEMATIC
RED•1V+IN
BLK•2GND
WHT•3COMM L
BLK•4COMM R
WHT•5MIC HI
WH/BLU•6MIC LO
BLK
BLK 
						

							 
16
Getting Your Headset Ready for Use
Details on making the connections
The pinout for the optional installed connector is:
1Red Headset power (10-32 VDC). Use a 
1/4-amp 
fuse or a 1/2-amp circuit breaker. 
2Black System ground. Connect to the existing 
audio ground.
3White Phone communication–Left.
4Black Phone communication–Right.
5White Microphone/Hi-audio. Connect to the por-
tion of the existing microphone jack that 
corresponds to the ring position of a head-
set microphone plug. Do not connect to 
the tip (PTT) segment.
6White/
BlueMicrophone/Lo-ground. Connect to the 
portion of the microphone jack that corre-
sponds to the barrel position of a headset 
microphone plug.
 Comm 
ShieldBlack Shield from Comm L and Comm R wire 
pair.
 Mic 
ShieldBlack Shield from Mic Hi and Mic Lo wire pair. 
						

							17
Getting Your Headset Ready for Use
Notes
For use with a stereo intercom, connect the left and right channels to 
their respective positions. For monaural operation, connect pins 3 & 
4 together to the tip of the existing phone jack.
Do not use excessive force or bend the installed connector. This may 
damage or break internal solder joints.
If the boom microphone works on radio transmit but not through the 
intercom, check pin 6. It may be incorrectly wired to the PTT seg-
ment of the microphone jack.
The wires connecting pins 3 & 4 and pins 5 & 6 are shielded, twisted 
pairs with a black wire shield termination exiting each pair. If existing 
wiring is not shielded, connect shields to existing audio wiring 
shields, or connect shield from Comm L and Comm R wire pair to 
audio ground.
The Bose
® aircraft panel connector cannot be installed to an audio 
system using transformer-coupled audio outputs. Call the Bose Avia-
tion Headset Department for details. 
Use proper adhesives
Adhesives approved for use with this connector are: 
•Ciba-Geigy Uralane 5754-A/B 
•Lord 710
•VTCS-6 Vibratite 
Do not let cyanoacrylate-based adhesives, flux remover, or other 
caustic compounds contact the connector body. These chemicals 
cause irreparable damage to the connector. For information on 
chemical compatibility and connector part number, call LEMO
® USA, 
Santa Rosa, CA at 1-800-444-5366. 
						

							18
Getting Your Headset Ready for Use
Mono, stereo, and helicopter connection diagrams
Figure 13
Diagram of connections for 
a mono signal
Figure 14
Diagram of connections to 
aircraft stereo jacks
Figure 15
Diagram of connections to 
a helicopter single jack
1 V+IN
BLK
WHT
BLK
WHT
WHT/BLU2 GND
3 COMM L
4 COMM R
5 MIC HI
6 MIC LO RED.5 10-32
V DC
Ring
(audio)
Microphone - Jack
Existing PTT
switch
and wiring
(no connection to
Bose
® headset) Barrel
(gnd) TPP
(PTT)
Headphone - Jack
Barrel
(audio gnd) Tip
(phone audio)Existing wiring to
aircraft intercom/
audio panel.
BLK
Ring
and wiring
®
Tip
(phone audio)
BLK
BLK
WHT
BLK
WHT
WHT/BLURED
1 V+IN
2 GND
3 COMM L
4 COMM R
5 MIC HI
6 MIC LO 10-32
V DC
BLK BLK
Microphone - Jack
Barrel
(gnd) TPP
(PTT)
Barrel
(audio gnd)Existing PTT
switch and
wiring
(no connection
to Bose
®headset)
Stereo headphone - JackAudio
Tip
(phone audio left)Phone
audio (right) .5A
6 MIC LO
5 MIC HI
4 COMM R
3 COMM L
2 GND
1 V+IN
.5 10-32
V DC
Barrel
(audio gnd) Existing single
4-prong jack
Existing wiring to
helicopter intercom
audio panel.BLK
BLKWHT
BLK
WHT
BLK
RED WHT/BLU 
						

							19
Using Your Headset
Wearing it properly 
Proper fit on your head is important both for comfort and good noise 
reduction performance. Here are a few guidelines:
•Use the left (L) and right (R) markings above the earcups to orient 
the headset properly (Figure 16). 
Figure 16
Matching the R and L 
markings to your right and 
left ears
•Use a light grasp to adjust each earcup so its cushion is com-
pletely over your ear and you feel an even, gentle pressure all 
around it. 
•Adjust the headband so it rests gently on top of your head.
Make your final adjustments in a noisy environment and with the 
power switch set to ON. 
Conditions related to fit
A low rumbling sound or frequent brief losses of active noise reduc-
tion (ANR) may indicate an improper fit or blocked earcup ports. 
Refer to “Headset Care and Maintenance” on page 25 for instruc-
tions on how to deal with a blockage.
In very loud conditions, such as during takeoff, you may experience 
brief reductions in ANR as the headset compensates for a momen-
tary pressure change. If this problem continues when the sound level 
returns to normal, however, refer to “In case of difficulty” on page 30. 
If the problem persists, contact the Bose
® Aviation Headset Depart-
ment for assistance.
During a long flight, you may feel a slight pressure point, which can 
be relieved by adjusting the headband position. 
Your experience with using the headset will help establish a sense of 
how it should sound and feel. 
R 
L  
						

							20
Using Your Headset
Microphone placement
Proper microphone placement is important for clear communica-
tions. With the headset on your head, make these adjustments:
1. Grasp the boom with your fingers and move the microphone up 
or down so it is level with your mouth (Figure 17).
Figure 17
Properly placing the micro-
phone, (a) wide side nearly 
touching your mouth, not 
(b) farther away or (c) tilted 
2. Pull the microphone in toward your lips. Position the microphone 
with its label side facing in. Though it will be slightly off center, 
the microphone should be 
1/2 inch from the opening of your lips.
3. Make sure the broad side of the microphone is facing your lips. 
Do not purse your lips.
Operating the battery powered headset
If your headset is battery powered, read the control information 
below. If your headset is aircraft powered, refer to “Operating the air-
craft powered headset” on page 23.
The battery powered headset uses AdaptiSense™ headset tech-
nology to supply the power your headset needs at any given time. 
Smart shutoff turns off the circuitry several minutes after you remove 
the headset.
This maximizes available energy for longer life from the two batteries. 
A tri-color LED provides real-time battery status. Its brightness is 
adjustable for day/night operation.
Mic label
(a)
(b) Mic is too 
far away
(c) Mic label 
is not facing 
mouth
Mic is 
1/2 inch 
from mouth