speakers
SI 26
TWO-WAY SURFACE MOUNT SPEAKERS
WITH 6.5" WOOFER
n Exclusive conical horn design
n 1" (2.5 cm) ferrofluid-cooled,
aluminum dome tweeter
n 6.5" (16.5 cm) long-throw woofer
with dual tuned bass reflex ports
n Frequency response: 70 Hz to 20 kHz
n 75 watts continuous pink noise,
150 watts continuous program
n Exclusive V-Lock
included
n 8 ohm nominal impedance
n Black or white high-impact, weather-
resistant enclosure
n Paintable grille and enclosure
n 5 year parts and labor warranty
®
mounting system
The Extron SI 26 is a two-way surface mount speaker featuring a ferrofluid-cooled,
aluminum dome tweeter coupled to an Extron exclusive, new conical horn design
for minimum phase shift and a flat response over the mid- and high-frequency
ranges. A long-throw woofer with large magnets provides solid low-frequency
response. This System Integrator® Series speaker is ideally suited for classrooms,
conference rooms, and boardrooms, and features a weather-resistant enclosure
for use in outdoor environments.
www.extron.com
DESCRIPTION SPECIFICATIONS
Front View
Side View
Back View Isometric View
8.5"
(21.6 cm)
10.06"
(25.5 cm)
7.09”
(18.0 cm)
13.0"
(33.0 cm)
E
xt
r
on
The Extron SI 26 two-way surface mount speaker features a ferrofluidcooled, aluminum dome tweeter coupled to an Extron exclusive,
new conical horn design for minimum phase shift and a flat response
over the mid- and high-frequency ranges. Harsh tonal qualities due
to cancellation in portions of the frequency range caused by phase
shifting are all but eliminated with this new conical horn design. A
long-throw woofer with large magnets provides solid low-frequency
response. A new approach to crossover design assures a smooth
transition from bass through midrange to the high frequencies,
delivering optimum voice and music reproduction. An input powerlimiting protection circuit is included for preventing woofer and
tweeter damage due to overdriving.
This System Integrator Series speaker is ideally suited for classrooms,
conference rooms, and boardrooms, and with a weather-resistant
construction, is at home in outdoor environments.
The SI 26 features a 6.5" (16.5 cm) long-throw woofer, a 1"
(2.5 cm) tweeter, 150 watts continuous program capacity, and
frequency response from 70 Hz to 20 kHz. This speaker has a nominal
impedance of 8 ohms with a durable, high-impact housing.
Included with the SI 26 is Extron’s exclusive patent pending V-Lock
mounting hardware, which facilitates easy, secure installations and
allows for wide 60° horizontal and 55° vertical travel.
The SI 26 is sold in pairs and is available in a black or white finish,
and includes a 5 year parts and labor warranty.
FEATURES
n Exclusive conical horn design
n 1" (2.5 cm) ferrofluid-cooled, aluminum dome tweeter
n
6.5" (16.5 cm) long-throw woofer with dual tuned bass reflex ports
n Frequency response: 70 Hz to 20 kHz
n 75 watts continuous pink noise, 150 watts continuous program
n Exclusive V-Lock mounting system included
n Internal driver overload protection
n 8 ohm nominal impedance
n Black or white high-impact, weather-resistant enclosure
n Grille and enclosure may be painted to match environment
n 5 year parts and labor warranty
Audio/Acoustic And electricAl
Speaker type ................................... 2-way, indoor/outdoor surface mount
speaker
Frequency range ............................ 70 Hz to 20 kHz, -10 dB, half space
Power capacity ................................ 75 W continuous pink noise
150 W continuous program
Nominal sensitivity .......................... 90 dB SPL, 1W, 1m, half space
Nominal impedance ....................... 8 ohms
Crossover frequency ........................ 2.3 kHz
Woofer ............................................ 6.5" (165 mm) polypropylene cone with
moisture resistant coating
Tweeter ........................................... 1.0" (25 mm) aluminum dome
Overload protection ........................ Full range power limiter, protecting the
tweeter, woofer, and crossover
Input connector ............................. 2 pin spring terminals
GenerAl
Package .......................................... 2 speakers (1 pair)
Temperature/humidity .................... Storage: -40 to +158 °F (-40 to +70 °C) /
10% to 90%, noncondensing
Operating: +32 to +122 °F (0 to +50 °C) /
10% to 90%, noncondensing
Mounting ........................................ Wall mountable with included wall
mountable V-lock brackets
NOTE: V-lock brackets can be angled up to 20° upward, 35° downward, 30° to
the left, and 30° to the right.
Enclosure type ................................ Plastic, trapezoidal, with metal grille and
bass reflex ports
Enclosure outer dimensions ............ 13.0" H x 8.5" W x 6.75" D (33.0 cm H x
21.6 cm W x 17.1 cm D)
Product weight ............................... 11 lbs (5 kg) each
Shipping weight ............................. 30 lbs (14 kg) per pair with mounting kit
package
Warranty ........................................ 5 years parts and labor
NOTE: All nominal levels are at ±10%.
DIMENSIONAL DRAWINGS
FEATURES
Extron Conical Horn
Exclusive to the Extron SI 26 is a conical horn design that works in
conjunction with the tweeter and phase plug to deliver minimal
phase shift and flat frequency response over the midrange and
high frequencies. Phase distortion is caused by a mismatch in
dispersion patterns from the woofer and tweeter at the crossover
frequency. This results in a harsh tonal quality characteristic of
frequency cancellation caused by phase shifting.
The Extron conical horn acts as a waveguide to create a wide
dispersion pattern for the tweeter that closely matches that of
the woofer, so that frequencies from both drivers are smoothly
merged together and the audio quality is improved and more
natural-sounding. The phase plug further contributes to the flat
frequency response and minimized phase shifting by working
with the highest frequencies emanating from the tweeter to
increase dispersion and reduce phase distortion.
Extron V-Lock Speaker Mounting System
Integrators are confronted with a number of challenges in
the successful installation of surface mount speakers. To
address these challenges, Extron has developed V-Lock,
an exclusive, patent pending speaker mounting system,
included with each SI 26 surface mount speaker.
V-Lock simplifies installation and substantially reduces the
effort required to place and correctly position wall-mounted
speakers, while also offering theft deterrence. V-Lock is
comprised of two components, one that is mounted to the
wall, and the other that is integral to the speaker.
• Easily mounts like a picture frame –
the V-Lock bracket to the wall, position the speaker so that the “V” rails on the back slide into the
“V” channel of the wall mount. The process is akin to installing a picture frame onto the wall. The
speaker is now fully supported by the mounting hardware, so that a balancing act is no longer
necessary.
• One-step positioning and locking –
the speaker to the mounting hardware by tightening the V-Lock mount through the slot on the front grille. The subtle, low profile Extron
badge covers the slot after installation, hiding it from view.
• Wide positioning arc –
optimized sound coverage.
• Theft-deterrent design –
the hardware is possible only through the front baffle slot, which is concealed. Additionally, only the included tool will work with the
hardware. Therefore, V-Lock provides an effective solution for deterring theft.
V-Lock offers wide 60° horizontal and 55° vertical travel, so that the speaker can be easily positioned to achieve
The V-Lock mounting hardware is integral to the speaker, making simple detachment impossible. Access to
After mounting
Both hands are now free to orient the speaker as desired. Then, using the included tool, fully secure
POLAR GRAPHS – 1/3 OCTAVE, Horizontal
100.00 Hz
125.00 Hz
160.00 Hz
200.00 Hz
-150
-120
-90
-60
-30
0 Deg
30
60
90
120
150
180
0
-10
-20
-30
250.00 Hz
315.00 Hz
400.00 Hz
500.00 Hz
-150
-120
-90
-60
-30
0 Deg
30
60
90
120
150
180
0
-10
-20
-30
630.00 Hz
800.00 Hz
1.00 kHz
1.25 kHz
-150
-120
-90
-60
-30
0 Deg
30
60
90
120
150
180
0
-10
-20
-30
1.60 kHz
2.00 kHz
2.50 kHz
3.15 kHz
-150
-120
-90
-60
-30
0 Deg
30
60
90
120
150
180
0
-10
-20
-30
4.00 kHz
5.00 kHz
6.30 kHz
8.00 kHz
-150
-120
-90
-60
-30
0 Deg
30
60
90
120
150
180
0
-10
-20
-30
10.00 kHz
12.50 kHz
16.00 kHz
20.00 kHz
-150
-120
-90
-60
-30
0 Deg
30
60
90
120
150
180
0
-10
-20
-30
Specifications are subject to change without notice.
20 Hz 50 100 200 500 1K 2K 5K 10K 20
K
20
30
40
50
60
70
80
90
100
dBSPL
0 Degrees
10 Degrees
20 Degrees
30 Degrees
40 Degrees
20 Hz 50 100 200 500 1K 2K 5K 10K 20
K
20
30
40
50
60
70
80
90
100
dBSPL
20 Hz 50 100 200 500 1K 2K 5K 10K 20K
Ohm
5
10
20
40
RESPONSE GRAPHS – FREQUENCY AND IMPEDANCE
SPL VS. FREQUENCY – 1 WATT @ 1 METER RESPONSE, FULL SPACE (4π)
SPL VS. FREQUENCY – HORIZONTAL OFF-AXIS RESPONSE, FULL SPACE (4π)
IMPEDANCE VS. FREQUENCY
Extron Electronics, Europe
Beeldschermweg 6C, 3821 AH Amersfoort
The Netherlands
+800.3987.6673 +31.33.453.4040
FAX +31.33.453.4050
Extron Electronics, Asia
135 Joo Seng Rd. #04-01
PM Industrial Bldg.
Singapore 368363
+65.6383.4400 FAX +65.6383.4664
Extron Electronics, Japan
Kyodo Building, 16 Ichibancho
Chiyoda-ku, Tokyo 102-0082
Japan
+81.3.3511.7655 FAX +81.3.3511.7656
Extron Electronics, USA
1230 South Lewis Street
Anaheim, CA 92805
800.633.9876 714.491.1500
FAX 714.491.1517
SURFACE SPEAKERS
SI
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8
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SI 28
8" (20.3 cm) Woofer
1" (2.5 cm) Tweeter
50 Hz to 20 kHz
180 Watts Cont. Prog.
CEILING SPEAKERS
SI 26CT
6.5" (16.5 cm) Woofer
1" (2.5 cm) Pivoting Tweeter
70 Hz to 20 kHz
150 Watts Cont. Prog.
Plenum Rated 8" Back Can
IN WALL SPEAKERS
SI 26
6.5" (16.5 cm) Woofer
1" (2.5 cm) Tweeter
70 Hz to 20 kHz
150 Watts Cont. Prog.
SI 3CT LP
3" (7.6 cm) Full Range
75 Hz to 17 kHz
32 Watts Cont. Prog.
Plenum Rated 4" Back Can
SI 3
3" (7.6 cm) full Range
75 Hz to 18 kHz
32 Watts Cont. Prog.
SI 26X
6.5" (16.5 cm) Woofer
50 Hz to 20 kHz
.75" (1.9 cm) Tweeter
50 Watts Cont. Prog.
© 2007 Extron Electronics. All rights reserved. All trademarks mentioned are the property of their respective owners.
SI 28W
8" (20.3 cm) Woofer
1" (2.5 cm) Tweeter
30 Hz to 20 kHz
70 Watts Cont. Prog.
SI 26W
6.5" (16.5 cm) Woofer
.75" (1.9 cm) Tweeter
40 Hz to 20 kHz
60 Watts Cont. Prog.
07-05
68-1428-01
REV. A
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