Flightcom 4DLX Classic User manual
4DLX CLASSIC
USERS GUIDE
• Insert the larger plug into the jack marked “headphone” or “phone”.
• Insert the smaller plug into the jack marked “microphone” or “mic”.
• Set the stereo/mono switch on the cable splitter box to the “M” position.
If connecting to a stereo intercom, set the switch to the “S” position.
• Adjust headband slider and mic boom for proper fit and comfort.
• Place the microphone no more than 1/8” from
lips, at the corner of the mouth. This is critical to
the performance of the noise canceling electret
microphone.
• A volume control is provided to reduce the level
of audio in each ear dome.
If the aircraft does not have a built-in push-to-talk (PTT) switch, a portable
PTT switch must be installed in order to use the radio. The master gain
control located in the aircraft radio should be optimized by an avionics
technician whenever adding a new model microphone to the system.
INSTALLATION
1.
2.
3.
The headset can be worn with the boom on the
right or left side of the head. To change the mic
boom placement, rotate the boom in an upward
motion. IMPORTANT: Never rotate or force the
boom in a downward direction for boom reversal as
you may damage the microphone cable.
To increase the size of the headset, slide the domes
in a downward direction. To decrease, slide the
domes in an upward direction until they stop.
Properly fitting the headset to each wearer’s head is
crucial to performance. The headpad should fit
comfortably on top of the head, without a gap or
space between the head and headpad. The head-
set should be centered on the head, and the ear
seals should comfortably cover the ears, without
being placed too far forward on the jawbone or
face. Place the mic no more than 1/8” from the lips
to ensure clarity and peak performance of the
noise canceling mic.
FITTING INSTRUCTIONS
Headset: Model 4DLX
Sensitivity: 104 dB re .0002 microbar @ 1000 Hz, 1mW
Frequency Response: 100-17,000 Hz +/- 5 dB in 6cc coupler
Impedance: 600 ohms nominal, 150 to 1200 ohm source
Weight: 16.8 ounces without comm cable
Weight of comm cable: 3.1 ounces
Shielded cable: Full floating with independent ground
Noise Reduction Rating: 24 dB
Microphone: Model A9
DC Bias Supply: 8 to 16 volts, not polarity sensitive
Source Resistance: 220 to 2200 ohms
Output Voltage: 370 mV @ 114 dB spl re .0002 microbar
Frequency Response: Optimized for speech clarity and noise
reduction
Maximum Ambient
Noise Level: 120 dB spl re .002 microbar
Caution:
Bias voltage supplied to the microphone must come from voltage and
resistance ranges specified above. Voltages supplied in excess of those
stated in the specifications can cause microphone failure and void warranty.
The mic audio signal is present between the ring and barrel of the mic plug;
tip is reserved for transmit keyline.
SPECIFICATIONS
WIRING DIAGRAM
Right
Left
Speakers
Mic.
6.3 mm Plug
5.2 mm Plug
MS
Questions? Call toll free 1-800-432-4342
Three-Year Limited Warranty to Original Purchaser
Flightcom Corporation warrants to the original purchaser of this product that it will be free from defects in
materials and workmanship, under normal and proper use, for the period of three years from date of
purchase. Flightcom Corporation will repair or replace, at its sole option, any parts showing factory defects
during this warranty period, subject to the following provisions. This warranty applies only to a new product
which has been sold through authorized channels of distribution. All work under warranty must be
performed by Flightcom Corporation. All returned products must be shipped to our address, freight
prepaid, accompanied by a dated proof of purchase. SAVE YOUR SALES SLIP! The purchaser voids this
warranty if he, she or others attempt to repair, service or alter the product in any way. This warranty does not
apply in the event of accident, abuse, improper installation, unauthorized repair, tampering, modification,
fire, flood, collision or other damage from external sources, including damage which is caused by user
replaceable parts (leaking batteries, etc.). This warranty does not extend to any other equipment or aircraft to
which this product may be attached or connected. The foregoing is your sole remedy for failure in service or
defect. Flightcom Corporation shall not be liable under this or any implied warranty for incidental or
consequential damages, nor for any installation or removal costs or other service fees. This warranty is in lieu
of all other warranties, express or implied, including the warranty of merchantability or fitness for use, which
are hereby excluded. To the extent that this exclusion is not legally enforceable, the duration of such implied
warranties shall be limited to three years from date of purchase. No suit for breach of express or implies
warranty may be brought after three years from date of purchase.
QUESTIONS CALL TOLL FREE 1.800.432.4342
FLIGHTCOM CORPORATION
7340 SW Durham Road, Portland, Oregon 97224 U.S.A.
© 2001, Rev. 12/92, Rev. 12/98, Rev. 1/01. Flightcom is a registered trademark of Flightcom Corporation.
All rights reserved. Printed in U.S.A. Specifications subject to change without notice.
600-0069-00/PG0101
This manual suits for next models
1
Table of contents
Other Flightcom Headphones manuals
