David Clark DC PRO-X User manual

Quick Reference Guide
WWW.DAVIDCLARK.COM

Congratulations on your purchase of the
most technologically advanced electronic
noise-cancelling headset available. As
with all of our products, The DC PRO-X
Electronic Noise Cancelling Headset is
backed by extraordinary customer service
and support.
David Clark Company assumes full
responsibility for the quality and performance
of our products. We are committed to a
policy of service whereby we will respond
in a prompt and positive manner to any
question or issue regarding one of our
products.
David Clark Company products have set
the standards of performance and excellence
for pilots throughout the world. Your new
DC PRO-X continues this legacy. We have
earned a reputation for excellence; we
intend to keep it by continuing to deserve
your confidence.
Robert A. Vincent, President
Thank you for purchasing the DC PRO-X
T H A N K Y O U . . .
2 WWW.DAVIDCLARK.COM
Futura Med w/Bernard Fashion

Hybrid Electronic Noise-Cancellation Technology
Your DC PRO-X features leading-edge Hybrid Electronic
Noise-Cancelling Technology (ENC) with feed-forward
and feed-back technology for superior active noise
reduction. Feed-forward noise cancelling is accomplished through
an exterior microphone in the ear dome that is isolated from the
speaker. The exterior microphone acquires the noise before it gets
to the ear. Feed-back noise cancelling is performed by the internal
microphone placed near the speaker. The signals are then inverted
to produce a reverse, ‘anti-noise’ signal. This hybrid technology
results in unsurpassed active noise reduction performance.
External
Microphone
Internal
Speaker
Internal
Microphone
Amplifier
Bluetooth &
Audio DSP
Inversion
Circuit
Inversion
Circuit
External Noise Signal
Internal Noise Signal
Cancellation Processor
HYBRID ENC TECHNOLOGY
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Anti-Noise
Signal
HYBRID

DC PRO-X Features
1
3
2
5
6
7
10
9
4
12
®
H E A D S E T
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Approved
FAA TSO-C139
8
11
Bluetooth
Control
Module

Technologically Advanced. Intelligently Designed.
1. Very light, yet rugged magnesium alloy headband and suspension
2. Fully adjustable suspension assembly for personalized comfort
3. Ultra-soft leatherette head pad with breathable, vented design
4. Swivel hinge stirrups disperse clamping pressure for secure yet
comfortable fit
5. Plush, ‘rest on ear’, Dura-Stitched leatherette ear seals reduce
heat build up
6. Hybrid ENC technology for best-in-class active noise attenuation
7. Dual Voice Coil Drivers provide Fail-Safe operation to ensure full
communication in the event of battery loss or system failure
8. Digital Signal Processing (DSP) Technology provides high-
fidelity audio for superior communications and music listening
9. M-55 Electret Microphone with enhanced noise cancelling
10. Full flex boom for precise mic placement
11. Bluetooth®wireless technology provides seamless integration
for connecting to cell phones, MP3, tablets or other personal
electronic devices
12. Collapsible design for compact storage in David Clark
headset bag
DC PRO-X Features
H E A D S E T F E A T U R E S
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Control Module - Quick Reference Guide
Power On/Off
Volume
Controls
Bluetooth
Mono/Stereo
Switch
Auto Shutoff
Switch
The Control Module is powered by two
(2) ‘AA’ batteries for up to 50 hours of
continuous use.
CONTROL MODULE
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®

Power
Press and hold for 2 seconds to
turn unit on or off:
•Solid Yellow: Initializing
•Blinking Green: On
•Blinking Red: On, Low Batteries
Volume Up/Down
•Adjust listen level volume up
or down
•Left/right adjustments are
independent
•Only usable when power is on;
Levels default to max when unit
is off
Mono/Stereo
•Set per type of intercom/audio
panel (factory default is “Mono”)
Auto Shutoff
When set to ON, unit will turn off
automatically after 5 minutes when:
•Intercom/audio panel turned off
•Not connected to intercom/audio
panel
•Not in a phone call
•Factory default is “OFF”
Bluetooth®
Wireless Technology
Press and hold for 2 seconds to turn
on Bluetooth® Wireless Technology:
•Blinking Purple: Initializing/Mute
Disabled
•Blinking Green: On, Not
Connected
•Blinking Yellow: Pairing Mode
•Blinking Blue: Paired and
Connected/Mute Enabled
To Pair:
•Turn Bluetooth®Wireless
Technology on (blinking green)
•Press Bluetooth®Wireless
Technology button to enter
pairing mode (blinking yellow)
•Search for devices from your
phone/device
•Select DC PRO-X and initiate
pairing on your device
•If prompted for PIN code,
enter 0 0 0 0
Control Module - Quick Reference Guide
CONTROL MODULE F E A T U R E S
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CONTROL MODULE
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Control Module Operation
1. Fail Safe - if batteries are dead or the unit is turned off, microphone
and earphones will function when connected to aircraft intercom.
2. The DC PRO-X headset is shipped with the Auto Shutoff feature OFF.
In this mode, the Hybrid ENC will function whenever the power is ON.
3. When Auto Shutoff is set to ON, unit will turn off automatically after 5
minutes when:
• Intercom/audio panel turned off
• Not connected to intercom/audio panel
• Not in a phone call
4. Auto shutoff can be enabled/disabled via a small switch located under
the batteries (see Quick Start diagram page 6).
5. Cell Phone Interface
• Use of the Bluetooth®wireless technology cell phone feature while
plugged into aircraft intercom is not recommended and may violate
applicable regulations
• All intercom parties hear cell phone outbound audio but cell phone
recipient’s voice is heard only by the headset connected/paired to the
cell phone
• Sidetone is present when connected to aircraft intercom. Sidetone may
not be (dependent on cell phone functionality) present when using the
headset and cell phone when not attached to the aircraft intercom
• Briey pressing the Bluetooth®wireless technology button will answer
or terminate a call (if supported by the cell phone)
• Cell phone receive audio is not muted when receiving a transmission from
ATC or intercom

CONTROL MODULE CONTROL MODULE
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Control Module Operation (cont.)
6. Music Listening
The Bluetooth®wireless technology feature allows you to listen to your
favorite music when paired with cell phones, MP3, tablets, or other
compatible devices. When listening to music briefly pressing the Bluetooth
button will enable/disable muting:
• Blinking blue (default): When receiving transmission from ATC or inter-
com, music will mute to prioritize communication. Once transmission is
completed, music audio will gradually return to the previously set volume
level. A falling two-tone chime is heard when entering this mode.
• Blinking purple: Music will not mute when transmission is received from
ATC or intercom. A rising two-tone chime is heard when entering this
mode.
Each time the DC PRO-X is powered 'ON', this setting will revert to the
default (muting) mode.
For DC PRO-XP (Panel Mount) Model Only
• Power can be provided by the aircraft when using the 6-pin Redel
connector (11-30 VDC)
• When powered by aircraft, power LED will be solid green
• If external power is lost, headset will revert to battery power
• Headset will not automatically turn on when external power is applied

FITTING
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Proper Fitting
The advanced suspension system of the DC PRO-X is designed for a simple
and comfortable fit. Proper fit is necessary for maximum effectiveness. The
headset should be worn so that the head pad lightly touches the top of the
head. Adjust the sliding assembly on each side as necessary (see Fig. 1),
keeping slide positions equal on either side, until the center of the ear
phone aperture within the ear seal is directly aligned with the ear canal.
The ultra-soft memory foam of the ear seal will conform to the contours of the
ear to provide an adequate seal. While in the presence of noise, turn on the
ANR circuitry and then adjust headset and ear seal position for lowest noise
heard, allowing optimum performance of the Hybrid ENC technology for
communications and music listening.
To adjust microphone placement, adjust boom up/down and in/out by rotating
and flexing the boom as necessary. Ideal microphone placement is 1/8”
from the lips, as this will provide maximum intelligibility and ambient noise
rejection. Fig. 1

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Futura Med w/Bernard Fashion
P
The DC PRO-XP Panel Mount Model
has all the same advanced features
and technology as the DC PRO-X
headset but provides 6-pin connector
compatibility to plug directly into the
panel of the aircraft utilizing one of
three available adapter cords and
connectors for (1) wiring directly to
aircraft avionics, (2) plug-in
portability with other than primary
aircraft, or (3) connection to aircraft
already equipped with David Clark ENC
'XP' Series panel mount modules (see
Optional Adapter Cords below).
DC PRO-XP Optional Adapter Cords
P/N 40998G-05
For wiring into existing
avionics. Must be purchased
if 6-pin connector is not
available in your aircraft.
P/N 40998G-02
Adapter cord with standard
aviation plugs allowing use
of DC PRO-XP headset when
flying in other than primary
aircraft.
P/N 40998G-03
Adapter cord allowing use
of DC PRO-XP headset in
aircraft already equipped
with David Clark ENC 'XP'
Series panel mount modules.
P A N E L M O U N T M O D E L

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Replacable Parts Removal/Installation
M-55 Microphone (P/N 09168P-66)
•To remove microphone: Gently pull off foam cover. Grasp
microphone firmly and pull straight out.
•To install microphone: Align keyway on microphone with
keyway on boom. “TALK” should be inward towards the
user’s face. Push until microphone snaps into place.
Microphone Foam Cover (P/N 40062G-05)
•Slide foam cover over top of microphone and secure
with ‘O’ ring (included).
Leatherette Ear Seals, Pair (P/N 15976P-03)
•To remove: Gently pull off.
•To install : Stretch earseal over lip of dome until completely
seated on dome.
Leatherette, Vented Head Pad (P/N 15977P-02)
•To remove: Gently pull off.
•To install : Align head pad with headband assembly and
push all around the perimeter to engage hook-and-loop
fasteners.
ACCESSORIESP A N E L M O U N T M O D E L

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David Clark Company aviation headsets are covered by a 5-year
warranty. We make every effort to prevent problems and the need
for repairs. In the unlikely event that you experience a problem,
David Clark Company qualified representatives are available to answer
your questions and provide the best customer service in the industry.
Many repairs are covered under warranty. Contact Customer Service:
Tel. [phone]
508-751-5800 (outside the USA)
Visit our website at www.davidclark.com
Customer Service and Support
C U S T O M E R S E R V I C E

COMPLIANCE
FCC Compliance Statement
This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions:
- This device may not cause harmful interference, and
- This device must accept any interference received, including interference that may cause undesired
operation.
Changes and modifications not expressly approved by David Clark Company, Inc. can void your authority to
operate this equipment under Federal Communications Commission rules.
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant
to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful
interference in a residential installation.
This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in
accordance with the instructions, may cause harmful interference to radio communications. However, there is
no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful
interference to radio or television reception, which can be determined by turning the equipment off and on,
the user is encouraged to try to correct theinterference by one or more of the following measures:
- Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and receiver.
- Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
- Consult the dealer or an experienced radio/TV technician for help.
This device complies with Industry Canada license-exempt RSS standard(s). Operation is subject to the
following two conditions:
1. This device may not cause harmful interference, and
2. This device must accept any interference received, including interference that may cause undesired
operation of the device.
French version of RSS-Gen, Sec. 7.1.3
Le présent appareil est conforme aux CNR d’Industrie Canada applicables aux appareils radio exempts de
licence. L’exploitation est autorisée aux deux conditions suivantes: (1) l’appareil ne doit pas produire de
brouillage, et (2) l’utilisateur de l’appareil doit accepter tout brouillage radioélectrique subi, même si le
brouillage est susceptible d’en compromettre le fonctionnement.
Made In USA
www.davidclark.com
19544P-97 (11/13)
© 2013 David Clark Company Incorporated
Green headset domes are a David Clark
Company Trademark.
Approved
FAA TSO-C139