Surface-Mount Speaker
SM400i
Technical Information for System Engineers
Key Features
• BroadBeam® waveguide technology
delivers a consistent dispersion pattern
up to 10 kHz for maximum coverage
area per speaker (EASE™ documented).
• One 102 mm (4 in) polypropylene woof-
er and one 25 mm (1 in) convex alumi-
num tweeter with FerroFluid cooling.
Mounting hardware included
Specifications: SM400i
System Type
4” Coaxial, surface mount, ported (25/70.7/100 Volt or
voice coil / 4 Ohm direct)
92 Hz - 22 kHz
73 Hz
40 Watts
20 Watts
• Weatherized components for indoor &
outdoor applications.
Frequency Response (-3 dB)1
Low Frequnecy (-10 dB)1
Max. Program Power
• Patented ZeroReflection™ enclosure
technology for optimal sound reproduc-
tion & cabinet rigidity.
Max. Continuous Power RMS2
Max. SPL dB @ 1 M
98 dB
88.5 dB
85 dB
4 Ohm
92º
71º
• Easy access 5-position selectable tap
switch for 25, 70.7 and 100 Volt applica-
tions with voice coil/4 Ohm direct sim-
plifies ordering & inventory tracking.
Sensitivity dB @ 1W/1M (2.83V)3
Sensitivity dB @ 1W/1M4
Impedance (nominal)
Coverage Angle (-6 dB @ 2 kHz)
Coverage Angle (-6 dB @ 10 kHz)
Directivity Factor (Q)
Directivity Index (DI)
Tap Selector
• Iridite-plated aluminum grille with pro-
tective powder-coated finish for lasting
durability.
2.89 (Averaged 100 Hz - 10 kHz); 5.1 @ 2 kHz
4.0 dB (Averaged 100 Hz - 10 kHz); 7.0 dB @ 2 kH
Weather-proof 5-position tap switch
with voice coil/4 Ohm direct position
• Weatherized components for indoor /
outdoor applications. Includes a tool-
free Stealth™ u-bracket mounting system
for fast & secure installation. Included
accessories: Mounting hardware, Euro-
block connector, & terminal weather boot.
Transformer Taps
70.7 V
20w
10w
5w
Output
98.0dB
94.9dB
91.9dB
88.9dB
100 V
20w
10w
5w
Output
98.0dB
94.9dB
91.9dB
25 V
3w
1w
0.63w
0.31w
Output
89w
86w
83w
80w
3w
• Vertical and horizontal mounting offer
precision aiming for indoor & outdoor
applications.
Transducers
Low-Frequency Driver
High-Frequency Driver
Low Frequency Voice Coil
Crossover Frequency
1 x 102mm (4in) Polypropylene cone, butyl rubber surround
25mm (1in) Convex aluminum tweeter with waveguide
25 mm (1 in)
2.27 kHz
• High quality black or white paint finish.
Custom colors available.
• Optional port plugs are included for
added weather resistance.
Network Type
Low Pass
High Pass
Enclosure Material
Grille Material
Inputs
Color Options
Width
12 dB per octave, 2nd order
12 dB per octave, 2nd order
Injection molded ABS, glass fiber reinforced
Iridite-plated aluminum with powder-coat finish
4 Pin, 5 mm Euroblock for individual or daisy chain connection
Black, white or custom colors available
177 mm / 6.97 in
246 mm / 9.68 in
190 mm / 7.47 in
1.8 kg / 3.9 lb
3.2 kg / 7.1 lb
Description
The SM400i is a 4” coaxial, ported
speaker with a low-profile surface-mount
enclosure design for indoor/outdoor
applications. Mounting hardware is
included & features a corrosion- and
theft-resistant Stealth-Bracket™ for easy &
secure installation. Nearly invisible from
sightlines, the Stealth-Bracket™ includes
uni-direction fasteners for tool-free, theft-
resistant security. SoundTube’s custom-
engineered driver and electro-acoustic
network deliver high-performance sound
in a cost-effective surface-mount speaker
design. The SM400i speaker incorporates a
5-position tap switch with voice coil/4 Ohm
direct for simplified ordering and stocking.
Provided port plugs can be used for added
weather resisitance.
Height
Depth (Including Bracket)
Weight
Shipping Weight
Accessories
Included
Corrosion- & theft resistant u-bracket mount with safety cable,
Euroblock connector, terminal weather boot, port plugs.
Paint mask
1 per box
Optional
Packaging
1
2
3
4
Frequency response is measured in Full space.
Continuous power rating, EIA-426-B test.
Average over published frequency response range.
1w1m sensitivity based on voltage required to yield 1w based on the minimum system impedance.
SoundTube continually develops new product innovations and improvements. Updates to existing
products without prior notice are an example of SoundTube’s drive for constant improvement.
©2006 SoundTube Entertainment, Inc. All rights reserved. PN TS-SM400 REV 11.13.06
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Surface-Mount Speaker
SM400i
Technical Information for System Engineers
spectrum (up to 10 kHz, EASE™ docu-
mented). The result is an audio system
with fewer speakers, reduced power
needs, shorter installation time and cost
savings on shipping & labor.
at [email protected] or call us at
435-647-9555 or 800-647-8823.
Data Acquisition
All performance data acquired at
SoundTube’s Technical Measurement
Center (TMC) are analyzed using a vari-
ety of standard measurement techniques,
including Measured Length Sequence
(MLS) and Time Delay Spectrometry
(TDS). Performance, development and
data acquisition tools include: Gold Line
TEF 20, CLIO, LMS, LEAP, and propri-
etary modeling software. EASE™ data
are acquired through an automated TEF
20/Outline/EASE™ interface.
Architectural Specifications
The loudspeaker shall consist of a 102 mm
(4 in) polypropylene woofer and one 25 mm
(1 in) convex aluminum tweeter with Ferro-
Fluid cooling.
Patented SoundTube
Technologies
SoundTube Entertainment is con-
stantly developing new technologies that
enhance audio product performance.
SoundTube Entertainment innovations are
protected by multiple U.S. & international
patents, which explicitly cover SoundTube
dome, enclosure and dispersion technolo-
gies. SoundTube Entertainment actively
defends its patents in order to protect
SoundTube resellers and end users.
Performance specifications of a typical
production unit shall be as follows: Useable
frequency response shall extend to 73 Hz
(-10 dB, full space, no external equalization).
Measured sensitivity (2.83 Volt input, 1
meter) shall be at least 88.5 dB. The speaker
shall have a nominal impedance of 4 Ohms
and be available for 25, 70.7 & 100 Volt
modes with voice coil/4 Ohm direct. The
frequency dividing network shall have a
crossover frequency of 2.27 kHz with slopes
of 12 dB per octave (2nd order) for both low
and high pass filters. Rated power capacity
shall be at least 20 Watts continuous power
(RMS) and conform to EIA-426-B testing.
Maximum continuous output at 1 meter
shall be 98 dB.
EASE™ Data – 3-D polar plots.
SoundTubeSPEC™ – Proprietary
SoundTube speaker placement software.
Technical Data and
Specification Tools
Technical assistance:
SoundTube SPEC™ software
and engineering support
Technical Data
SoundTube Entertainment strives to
provide complete and effective technical
information and data to dealers, engineers
and designers. All data are available
from SoundTube Entertainment or at
www.soundtube.com.
For quick and easy specification,
visit www.soundtube.com and use
SoundTube’s proprietary specification
software. For technical assistance,
including detailed EASE™ plots, con-
tact SoundTube Entertainment directly
The low-frequency transducer shall have
a polypropylene cone with butyl rubber sur-
round. The high-frequency transducer shall
Polar Plots
Horizontal
Vertical
250 Hz
500 Hz
1,000 Hz
125 Hz
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Technical data, EASE plots, SoundTubeSPEC software & product downloads available at www.soundtube.com
Download from Www.Somanuals.com. All Manuals Search And Download.
Surface-Mount Speaker
SM400i
Technical Information for System Engineers
be constructed of aluminum with a propri-
etary BroadBeam® waveguide.
Mechanical Drawings
Installation and safety attachment for the
SM400i shall be by Stealth U-bracket affixed
to the speaker chassis via ABS handle with
steel insert and come with a safety cable for
seismic and safety redundancy. The external
wiring input connector shall be a 4-pin,
5 mm Euroblock for 4 Ohm or distributed
systems and shall accept from 10 – 22 gauge
wire. The system shall be for indoor & out-
door applications and shall have a weather-
resistant terminal boot covering all wire
connectors.
245.9 mm
(9.68 in)
The enclosure shall be constructed of
injection-molded ABS with optional port
plug for added weather resistance. The plugs
shall be constructed of closed-cell foam. The
grille shall be constructed of iridite-plated,
powder-coated aluminum for lasting per-
formance in the elements. The SM400i shall
include mounting hardware, Euroblock con-
nector and weather-resistant terminal boot.
The maximum overall cabinet dimensions
shall be 245.9 mm (9.68 in) in height by 177.0
mm (6.97 in) in width by 189.7 mm (7.47 in)
in depth (including Stealth™ bracket)
177.0 mm
(6.97 in)
189.7 mm
(7.47 in)
The system shall be the SoundTube
SM400i with mounting hardware for both
low & high impedance applications.
SoundTube Entertainment
6430 North Business Park Loop
Park City, Utah 84098
Phone 435.647.9555
Fax
435.647.9666
Toll Free 800.647.TUBE
All SoundTube products come
with a 5-year limited warranty.
SoundTube Entertainment manufactures a complete line of speakers for:
Open-Ceiling • In-Ceiling • Surface-Mount • Outdoor • Sound-Focusing
All SoundTube products are designed and engineered in the USA.
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