Stone Mountain, Ltd. Introduction
 Established in January 2002.
 Business model is to provide high quality, extremely rugged
and reliable speaker microphones to the land mobile radio
(LMR) market, focusing on Public Safety, Emergency
Response, Military and Industrial applications.
 We offer two speaker microphone platforms (Sword and
Juno), a PTT platform (Utah) and several audio accessories
(Omaha Series). All major OEM radio platforms are
supported.
 See www.stonemountainltd.com for more details.
Product
Lines
Juno
™ Speaker
Microphone
• Juno speaker microphone series.
• Sword speaker microphone series.
• Utah chest PTT series.
• Omaha audio accessory series.
Sword Speaker Microphone
• Designed for Law Enforcement,
Military, Fire Fighting, Utility, and
Industrial users.
• 50 mm. Mylar speaker.
• Supports a full line of 2.5 mm., 3.5 mm.
and six pin Hirose connector
accessories.
• Immersion rated to two meters for 60
minutes.
• 24 month warranty.
Sword ProBand Antenna Series
• Antenna incorporates Printed Circuit
Flex Film Technology (PCFFT) .
• Antenna is included with speaker mic.
• Micro miniature custom coax cable and
connectors.
• Full six foot extended coil cable.
• Supports a full line of 2.5 mm., 3.5 mm.
and six pin Hirose connector
accessories.
• Supports 700 & 800MHz. frequency.
• Immersion rated to two meters for 60
minutes.
• 24 month warranty.
Sword TruBand Antenna Series
• Micro miniature custom coax cable and
connectors.
• Full six foot extended coil cable.
• Supports a full line of 2.5 mm., 3.5 mm.
and six pin Hirose connector accessories.
• Supports VHF, UHF, 700, 800, and 900MHz.
frequencies.
• Antenna is purchased separately from
speaker Mic.
• Immersion rated to two meters for 60
minutes.
• 24 month warranty.
Sword TruBand Antenna Series
VHF
VHF
VHF
VHF
VHF
136MHz - 144MHz
145MHz - 148MHz
150MHz - 162MHz
155MHz - 164MHz
164MHz - 174MHz
UHF 400MHz - 449MHz
UHF 450MHz - 469MHz
UHF 470MHz - 512MHz
800
800MHz - 866MHz
900
902MHz - 960MHz
Speaker Microphone Design Ideology
• Z-Axis design for manufacturability
and ease of repair.
• Modular design to facilitate
upgrading.
• Interchangeable components to
minimize inventory.
• No soldered connections - All gold
plated custom connectors and
pressure contacts for reliability in
harsh environments.
• Integrally molded buttons for
environmental sealing.
• Two shot revolving platen
overmolding provides comfortable
rubber user interface.
Engineered Materials
• Substrate is a custom engineered
PC/ABS blend thermoplastic polymer.
• Overmold is a thermoplastic
elastomer alloy designed especially
for bonding to the substrate PC/ABS
polymer.
• Molded concurrently in a two shot
revolving platen overmolding
process for optimum quality and part
integrity.
• Allows emergency button, push to
talk (PTT) and volume control
interface buttons to be integrally
molded to the case, resulting in
unprecedented sealing capability.
Form Factor
•
•
•
•
Intuitive button locations.
Ergonomic form factor.
Comfortable rubber interface.
Roman arch design allows extreme
compression loading in any direction.
• Attractive design.
• Form follows Function.
Receive Audio System
• Conventional forward acoustic
speaker porting.
• Additional dual radial acoustic
speaker porting - Allows speaker mic
to be worn in any orientation without
degradation to acoustic performance.
• Speaker cavity self draining feature.
• No speaker cloth to trap dust/debrisClean speaker cavity by flushing with
tap water.
• Superb acoustic performance and
clarity throughout the entire life of the
product.
Microphone Porting - Sword
• AllClear microphone porting system.
• Protected 3.5mm. microphone
opening.
• Sculpted, polished intake geometry
removes surface tension – Minimizes
trapped water and debris.
• Enhances mic sensitivity.
• Self clearing capability.
• Integrally protective hood directs
falling water away from mic opening.
• Maintains clear transmit audio even
when covered with water.
Microphone Porting - Juno
• AllClear microphone porting system.
• Oversize 3.5mm. microphone opening.
• Sculpted, polished intake geometry
removes surface tension – Minimizes
trapped water and debris.
• Enhances mic sensitivity.
• Self clearing capability.
• Integrally molded ribs in protective
hood directs falling water away from
mic opening.
• Maintains clear transmit audio even
when covered with water.
Integrally Molded Buttons
• PTT
– Large contact area.
– Positive tactile response.
– Intuitive location.
• Volume Control
– Discrete high and low buttons.
– Programmable on certain radio
models.
• Emergency
– Recessed design coupled with
custom 200 gm. and 320 gm.
contact force switches to eliminate
false emergencies.
Belt Clip
Belt Clip w/o screws SMX25155
Belt Clip w/ screws –
SMX26755
• Large, rugged design.
• PC/ABS custom engineered polymer.
• High quality stainless steel
components for reliability and
corrosion resistance.
• 360° rotation with positive detents at
every 45°.
• High closure force.
• 180 degree lip for positive retention.
• Accommodates any tactical gear, turn
out coat, etc.
• Easy to replace and repair.
Custom O-Ring Seal Screws
Seal Screw Assembly,
K22xK6 – SMX19086
Seal Screw Assembly,
K22xK14 – SMX19024
• Custom designed and tooled.
• Discrete low durometer silicon o-ring
seal.
• Recessed screw head for mating oring means no compression set Maintains a reliable seal over the life
of the product.
• Nickel plated to protect against
corrosion in harsh environments.
• Standard Torx drive throughout for
positive, repeatable engagement
torque during installation.
• Reusable.
Speaker & Installation
•
•
•
•
High quality Mylar speaker.
Heavy duty magnet and construction.
Miniature connector interface.
Attached to front cover with custom
designed and tooled pressure
sensitive adhesive (PSA) component.
• Hermetically sealed via robotically
dispensed engineering adhesive
compound.
Dynamic Transfer Bars
Sword PTT Transfer Bar – SMX19056
Emergency Transfer Bar – SMX19007
• Overmolded dynamic transfer bars for
emergency and PTT buttons.
• Ensures positive actuation over entire
button user interface surface.
• Maintains tactile response throughout
product life.
• Custom “ball and socket” mating
interface - Ease of assembly and
repair.
Custom Snap Dome Switches
200 gm – SMX19506
Used for Emergency Button
320 gm – SMX19013
Used for Volume Control
Front Cover Assembly – SMX19931
• Custom designed and tooled.
• 100% gold plated.
• Side actuating snap domes in 200
gm. and 320 gm. contact force.
• Pogo pin printed circuited board
(PCB) interface-No soldering/no
wires.
• Allows Z-axis assembly.
• Facilitates repair.
• Custom “ball and socket” mating
interface - Ease of assembly and
repair.
• Extensively tested in house and
verified to one million actuations
minimum.
Transmit Audio System
Microphone
Assembly –
SMX19688
• Four component custom designed
and tooled proprietary microphone
Sword Sound
Port – SMX19058 acoustic gasket assembly.
• Custom designed and tooled silicon
rubber acoustic boot.
Microphone
• High sensitivity omni directional
Boot –
SMX19687
microphone.
• Miniature connector interface for
Microphone
ease of assembly and repair - No
Gasket –
soldering.
SMX19770
• Custom designed and tooled silicon
rubber sound port.
• Superb transmit audio and clarity.
Rear Cover Assembly
• PC/ABS custom engineered polymer.
• Compression molded, custom
designed and tooled low durometer
silicon rubber environmental seal.
• Low compression set speaker support
component.
• Labyrinth design venting system with
waterproof gaskets.
• 100% of all seal interface surfaces are
highly polished for reliable
environmental sealing.
• Discrete sub assembly supports Z-axis
assembly - Ease of repair.
Rear Cover Assembly – SMX19061
Main PCB Assembly
• Self aligning via integrally molded
mating geometry in the front cover.
• 100% surface mount technology (SMT)
components.
• 100% gold plated for optimum
conductivity, performance and
reliability in harsh environments.
• No hand soldering - Easy to repair.
• All Main PCB’s will accommodate every
SML cable/accessory option with
existing SMT connectors - Easy to
upgrade.
• Clean, efficient design.
Cable Attachment & Accessories
• Supports system accessory option
upgrade.
• Aircraft aluminum grade cable
clamps, includes holes for easy
release and repair.
• Integrally overmolded waterproof
accessory interfaces in the cable.
• Options include 2.5 mm, 3.5 mm. and
6 pin Hirose.
• Miniature connectors throughout - No
soldering.
Cable – Strain Relief, Sealing & Performance
• Custom designed, machined high strength
brass ferrules, crimped to the cable.
• 50K cycle endurance rating.
• Overmolded with custom engineered
thermoplastic polyurethane (TPU).
• Designed using finite element analysis
(FEA) for optimized strength to weight
ratio.
• Integrally molded o-ring seal interfaces
with high quality silicon rubber o-ring
seals.
• Integrally molded locking geometry
prevents rotation of cable and subsequent
damage to the electrical connections.
• 200 Newton minimum rated pull strength.
Radio Connector (RC) Design
• All RC’s are either custom tooled by
SML or sourced from quality OEM RC
suppliers.
• Most SML tooled RC’s are fastened
together using seal screws - No snap
fits.
• All SML tooled RC’s include miniature
connectors - No soldered wires.
• Most SML tooled RC’s include
multiple molded silicon components
for redundant environmental sealing.
• Custom three layer PSA includes
silicon and acrylic adhesive
components.
• All seal surfaces 100% polished.
Radio Connector (RC) PCB
• All RC PCB’s are either custom
tooled by SML or sourced from
quality OEM RC suppliers.
• All SML tooled PCB’s are 100%
surface mount technology (SMT).
• All SML tooled PCB’s are 100% gold
plated for optimum reliability in harsh
environments.
• All SML tooled PCB’s are fully
connectorized for ease of assembly
and repair.
• High strength, gold plated pogo pins
for long, reliable life.
ProBand Antenna Technology
• Printed Circuit Flex Film Technology
(PCFFT) allows miniaturization of the
physical antenna envelope.
• High RF performance.
• Bendable and durable.
• Will not corrode or rust.
• Waterproof.
• Low profile.
• Light weight.
• Supports 800MHz., with 700MHz and
900MHz. pending.
ProBand Assembly
• Custom engineered thermoplastic
elastomer alloy overmolded antenna
assembly.
• High quality, low durometer discrete
silicon o-ring sealing component.
• Antenna included with speaker
microphone - No need to dismantle
radio antenna.
• No soldered connections for ease of
repair and high reliability.
• Micro miniature, low loss coax
connectors and cable allow full six
foot extended coil cord.
Plated Rear Cover – SMX19875
TruBand Assembly
• Replaceable injection molded 1/4
wave helical antenna.
• High quality, low durometer discrete
silicon o-ring sealing component.
• No soldered connections for ease of
repair and high reliability.
• Replaceable gold plated surface
mount RF PCB.
• Micro miniature, low loss coax
connectors and cable allow full six
foot extended coil cord.
• VHF, UHF, 800MHz. and 900MHz.
antennas.
Plated TruBand Rear Cover Assembly – SMX25072
RF Plating
• Cutting edge vacuum metallization
plating process using copper and
nickel materials.
• High conductivity.
• Excellent shielding.
• Will not rust, corrode or degrade in
corrosive environments.
• Highest quality.
Sword Plated Front Cover – SMX19933
Cable Assemblies
• Six foot fully extended cable
assembly.
• 100% fully connectorized signal and
coax interface to speaker mic head
and all SML tooled radio connectors No soldered connections.
• Integrally overmolded,
environmentally sealed accessory
interfaces in the cable.
• Options include plain, 2.5 mm., 3.5
mm. and six pin Hirose.
• Rugged 5.5mm. diameter OD cable –
Industry’s largest.
• Absolute highest quality, most
rugged cable assembly available.
Available Options
• ProGain - User adjustable
microphone gain system.
• AGC - Automatic Gain Control
feature.
• Stainless steel knurled
thumb screw.
• Interface to various OEM
headsets, SCBA’s, etc.
• Standard or half length
cables (most models).
ProGainTM System
• Allows the user to custom attenuate
the speaker mic Tx audio
microphone gain.
• Easy to access, sealed adjustable
gain potentiometer.
• Maintains system environmental
seal/immersion rating.
• Adjust microphone gain from
maximum to minimum transmit
power – Allowing close quarter
communications by eliminating
feedback.
• Simply remove the belt clip via four
T6 Torx fasteners - Adjust mic gain
with a small screw driver.
• Available on both Sword and Juno.
AGC - Automatic Gain Control
•
•
•
•
Unique to SML
Mounts to main speaker mic PCB.
Custom tunable via software inputs.
Automatically adjusts the
microphone sensitivity and provides
a consistent level of receive audio
• Useful If the user is whispering,
shouting, or if background noise
such as wind or industrial noise is
present.
• Increases performance and
addresses interface problems typical
with accessories such as headsets
and SCBA communication systems.
• Available on Sword.
Sword Technical Specifications
 Microphone Element
Omni directional
 Microphone Sensitivity
-40 dBV (0dB=1V/Pa)
 Speaker Diameter
2.0” (50 mm)
 Speaker Output Power
½ to 1 W (dependent on radio brand/model)
 Speaker Output Level (SPL)
93 to 100 dB SPL (dependent on radio brand/model)
 Operating Voltage Range 5.0 to 9.0 VDC (microphone)
 Female Accessory Jacks
3.5 mm & 2.5 mm for remote Rx audio or 6 pin Hirose HR10A 7R 6S
“Locking Quick Disconnect” for remote Tx/Microphone, Rx/Earphone
and PTT functions
 Frequency Response
300 – 3000 Hz
 Distortion
4% (speaker)
 Dimensions
3⅜” L x 2⅝” W x 1” H (84.8 mm x 66.0 mm x 26.8 mm)
 Weight
7.5 oz (212 gm)
 Operating Temperature
-30°C to +60°C
 Storage Temperature
-57°C to +80°C
 Volume Control
Up (+) and Down (-) buttons for adjustable volume control
 Rotating Clothing Clip
360°with positive detents at every 45°
 Cable Assembly Flex Life
50,000 cycles
 Cable Assembly Pull Strength1
 Cable Assembly Pull Strength2
 Immersion Rating3
 Mil-Std 810C, D, E & F Specs
 Low Pressure 500.4/I & II
 High Temp 501.4/I & II
 Low Temp 502.4/I & II
 Blowing Rain 506.4/I3
 Leakage 512.4/I3
 Humidity 507.4/II
 Salt Fog 509.4/I
 Blowing Dust 510.4/I
 Vibration 514.4/I/CAT 1 & 104
 Shock 516.5/I & IV
 Temp Shock 503.4/I
 Solar Radiation 505.4/II
45 lbs. (200N) tensile strength, in line with speaker mic
45 lbs. (200N) tensile strength, perpendicular to speaker mic
One (1) meters for thirty (30) minutes
Designed to meet or exceed
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Footnotes:
1 Straight pull strength, at speaker microphone end
2 Right angle pull strength, at speaker microphone end
3 Speaker mic only, excludes radio device connector
4 Curve W