Replacement Parts & Accessories
D e scription
Pa rt N umbe r
300 Ohm Speaker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .108-0008-00
Acoustic Foam Set, 3 pieces (internal) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108-0027-00
Boom Assembly (flex) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .108-0015-00
Cloth Covers (a dozen pairs) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .108-0003-00
Ear Seals - Standard (pair) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .108-0012-00
Grommet, Bend Relief (Comm Cable) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 471-0002-10
Headstrap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108-0025-00
Direct-Wire Headset
Under-The-Helmet,
Mic Muffs with O-Rings (dozen) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108-0004-00
PTT - Red . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108-0010-01
Volume Control, Potentiometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .151-0001-00
Volume Control, Knob . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 551-0001-00
Two-Year Limited Warranty to the Original Purchaser
Sonetics Corporation warrants to the original purchaser of its products, that they will be free from defects
in materials and workmanship, under normal and proper use, for the period of two years from date of
purchase. Sonetics Corporation will repair or replace, at its 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 Sonetics Corporation. All returned products must be shipped to our address, freight
prepaid, accompanied by a dated proof of purchase. 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 apparatus to
which this product may be attached or connected. The foregoing is your sole remedy for failure in
service or defects. Sonetics 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 of 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 two years from date of
purchase. No suit for breach of express or implied warranty may be brought after two years from date
of purchase.
FIRECOM is a division of Sonetics Corporation
7340 SW Durham Road • Portland, Oregon 97224
800-527-0555 • 503-684-6647 • Fax: 503-620-2943
Email: sales@firecom.com • www.firecom.com
Copyright © 2006 Sonetics Corporation - All rights reserved.
The information in this document is subject to change without notice.
No part of this document may be reproduced in any form without prior written consent of Sonetics Corporation.
This document is part number 600-0021-00 Rev D. Printed in Taiwan
Features
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Liquid foam ear seals for greater comfort
Unbreakable, adjustable headstrap
Detent volume control located on the ear dome
Push-To-Talk (PTT) located on the ear dome
Flexible mic boom with slide adjustment for accurate mic positioning
Mic boom and rear headband rotate for right or left dress
Noise canceling electret microphone
Meets NFPA 1500 standards, reducing ambient noise by 24dB
Two-year warranty
Radio Connection
Mic Muffs
The Firecom direct-wire headset plugs into the speaker mic jack on the handheld radio and
replaces any speaker mic that may be presently attached to the radio.
Proper Fit
When worn properly, this headset will provide significanthearing protection. If it is not worn
properly, the headset’s effectiveness in reducing harmful noise is severely compromised.
• The length or vertical fit of the headset ear dome is adjusted by the headstrap. Adjust as
necessary to achieve a fit that ensures the headset ear dome completely covers the ear.
• When switching between right and left dress, rotate the mic boom in an upward direction
ONLY, as shown in the diagram below.
Rotating the mic boom in the wrong direction may damage the boom or wiring.
The headset microphone is covered with a washable, replaceable foam mic muff. This mic
muff helps prevent the “pops” and “hisses” that can occur from speaking into a microphone
that is close to the mouth.
To clean or replace the mic muff:
1. Remove the o-ring.
2. Slip the mic muff off the microphone.
3. At this time, you can decide whether to clean
or replace the mic muff.
Mic muff
O-ring
Mic boom
If you clean the mic muff, use a mild detergent, rinse it out well
and let it dry completely before re-installing it on the microphone.
• The metal headband should be rotated in an upward direction ONLY as shown in the
diagram below.
4. Slide the mic muff on the microphone.
5. Install the o-ring on the mic muff to secure it.
Damage to the headband cable may result from rotating the metal headband in the
wrong direction.
• For maximum comfort, wear the headset as far back on the head as possible, while ensuring
the ear dome still completely covers the ear. If discomfort is felt in the jawbone, you are
wearing the headset too far forward.
Replacement mic muffs may be ordered from your local Firecom dealer.
Microphone Placement
Place the microphone in front of the mouth and NO MORE than 1/8" away from the lips as
shown in the diagram below. Placement of the microphone is CRITICAL for proper operation.
Specifications
Headsets
Sensitivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104dB re .0002 microbar @ 1000 Hz, 1 mW
Frequency Response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100-17,000 Hz +5 dB in 6 cc coupler
Impedance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 600 ohms nominal, 150 to 1200 ohm source
Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19.6 oz.
Noise Reduction Rating (NRR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24dB
If the microphone is positioned incorrectly, you may experience a reduction in
volume and clarity of intercom and radio communication .
Headset Volume
The volume of received radio communications is controlled primarily by the radio's volume
control. There is a volume control located on the ear dome of the headset for minor volume
adjustment.
Radio Transmit
The Firecom direct-wire headset has a red Push-To-Talk (PTT) button on the ear dome. Pressing
this button will key the radio. Press and hold the PTT while speaking into the microphone to
transmit on the radio. Note: In order to maintain contact, firmly depress the PTT switch until
you hear or feel a click.
Adjustable
headstrap
Adjustable headstrap
Rotate the headband
ONLY in an upward
direction as shown
Rotate the mic boom
ONLY in an upward
direction as shown
Subject
Mean
Std. Dev
125
18.4
3.8
250
25.6
3.7
500
30
3.8
1000
34.4
2.6
Frequency in Hz
2000
3150
32.4
38.3
3.2
4.1
4000
40.6
4.2
6300
40.6
3.9
8000
39.6
3.8
To the user, the EPA requires the manufacturer to provide the following information:
NOTICE: Improper fit of this device will reduce its effectiveness in attenuating noise. Consult
the enclosed instructions for proper fit.
Although hearing protectors can be recommended for protection against the harmful effects
of impulsive noise, the Noise Reduction Rating (NRR) is based on the attenuation of continuos
noise and may not be accurate indicator of the protection attainable against impulsive noise
such as gunfire.
CAUTIONARY NOTE: The level of noise entering a person’s ear, when hearing protector is worn as
directed, is closely approximated by the difference between the A-weighted environmental
noise level and the NRR.
Example:
1. The environmental noise level as measured at the ear is 92 dBA.
2. The NRR is (value on label) decibels (dB).
3. The level of noise entering the ear is approximately equal to [92 dB(A) - dB(A)].
Volume control
Push-To-Talk (PTT) button (red)
No more than
1/8" from lips
CAUTION: For noise enviroments dominated by frequencies below 500 Hz the C weighted
environmental noise level should be used.
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