Extron electronic SI 26CT User Manual

www.extron.com

© 2008 Extron Electronics. All rights reserved.
Pricing and specifications may change without notice.

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SI 26CT

Two-Way Ceiling Speakers with 8" Back Can and Transformer

feAt ure s

•

8" (20.3 cm) deep metal back can for plenum environments

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1" (2.5 cm) pivoting ferrofluid-cooled, titanium-coated dome tweeter

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6.5" (16.5 cm) long-throw woofer with a tuned bass reflex port

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16 ohm direct or 70/100 volt operation on a 5 position, behind-the-grille selector:

- 16 ohm direct

- 70 volt: 60, 30, 15, and 7.5 watt selectable

- 100 volt: 60, 30, and 15 watt selectable

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Frequency response: 70 Hz to 20 kHz

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75 watts continuous pink noise, 150 watts continuous program

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Internal driver overload protection in direct 16 ohm position

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110° conical dispersion

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Locking arms for quick ceiling installation

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UL plenum rated

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Includes C-ring & V-rail kit

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Grille and bezel are available in white only and may be painted to

match environment

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5 year parts and labor warranty

s P eA ke r s

descriPtion

The Extron SI 26CT is a high power, two-way ceiling speaker featuring a coaxial dual driver
design, transformer, and an 8" (20.3 cm) metal back can. The SI 26CT is ideal for plenum
installations in large classrooms, lecture halls, and auditoriums. A 6.5" (16.5 cm) long-throw
woofer coupled to a 1" (2.5 cm) pivoting titanium-coated dome tweeter delivers accurate voice
and music reproduction, as well as wide angle sound distribution. Special consideration is
given to the crossover from the woofer to the tweeter, providing a smooth transition from low
to mid frequencies. Voice reproduction from documentaries and live microphones is natural
and clear sounding.

Music reproduction is enhanced with the exceptional low-frequency response of the long-throw
woofer. Bass is optimized using a tuned port for improved low-frequency response. The pivoting
dome tweeter allows aiming of the mid and high frequencies for best area coverage, and
matches the high power capability of the woofer with enhanced midrange and high-frequency
response for high ceiling applications. Overall response is from 70 Hz to 20 kHz.

This System Integ rato r® Series speaker is ideally suited for overhead distributed audio
applications for music and voice in conference rooms, lecture halls, auditoriums, and other
high-ceiling venues requiring high power, plenum-rated ceiling speakers.

SI 26CT speakers are sold in pairs and include a 5 year parts and labor warranty.

The SI 26CT offers both direct 16 ohm or 70/100 volt operation with a behind-the-grille, five
position power selector switch. In the 16 ohm direct mode, an input power limiting protection
circuit is included for preventing woofer and tweeter damage due to overdriving.

For room balancing with 70/100 volt systems, the behind-the-grille power selector switch
allows for 60, 30, 15, and 7.5 watt settings in 70 volt operation and 60, 30, and 15 watt
settings for 100 volt operation.

The SI 26CT features four locking arms for a fast and secure hard ceiling installation. C-ring and
V-rail mounting hardware for installation in a suspended T-bar ceiling is included. The SI 26CT
features a white grille and bezel that can be painted to match the architectural elements of
the environment.

extron ceilin G mo un t ki t

The Extron Ceiling Mount Kit is included with the SI 26CT. It is used to install speakers into
a suspended T-bar ceiling, providing additional support to prevent damage to the acoustical
ceiling tiles.

•

Provides structural support for suspended T-bar installations

•

Prevents damage to acoustical ceiling tiles

•

Two C-rings and four V-rails included in each kit

Ceiling Mount Kit

sPecificAtio ns

Aud io / A co ust ic And el ect ric Al

Speaker type .. .. .. . .. .. . .. .. . .. .. 2-way ceiling speaker with metal back can

Frequency range . .. .. . .. .. . .. .. . 70 Hz to 20 kHz, -10 dB, half space

Power capacity .. . .. .. . .. .. . .. .. . 75 W continuous pink noise

Nominal sensitivity .. .. . .. .. . .. .. 89 dB SPL, 1 W @ 1 m, 60 W tap, half space

Nominal impedance . .. . .. .. . .. . 16 ohms

Crossover frequency .. .. . .. .. . .. 3.5 kHz

Nominal coverage .. . .. .. . .. .. . .. 110° conical coverage

Rotary switch taps .. .. . .. .. . .. .. 70V: 60 W, 30 W, 15 W, 7.5 W, 16 ohms direct

Woofer .. .. . .. .. . .. .. . .. .. . .. .. .. . .. 6.5" (165 mm) polypropylene cone with moisture resistant coating

Tweeter.. .. . .. .. . .. .. .. . .. .. . .. .. . . 1.0" (25 mm) titanium dome

Overload protection .. .. . .. .. . .. Full range power limiter with the 16 ohm direct input only, protecting the tweeter,

Input connector .. .. . .. .. . .. .. .. . (1) 5 mm captive screw connector, 4 pole for 1 input and 1 loop-through

Gen erA l

Package .. . .. .. . .. .. . .. .. . .. .. . .. .. 2 speakers (1 pair)

Temperature / humidity . .. .. . .. Storage: -40 to +158 °F (-40 to +70 °C) / 10% to 90%, noncondensing

Mounting .. . .. .. . .. .. .. . .. .. . .. .. . . Ceiling mountable with included hardware

Enclosure type .. . .. .. . .. .. . .. .. . Metal back can; high-impact, fire-resistant (UL94V-0) plastic baffle/rim

Enclosure outer dimensions.. . 8.3" H x 9.9" diameter (211 mm x 251 mm diameter)

Cutout dimensions .. .. . .. .. . .. .. 8.397" diameter (227 mm diameter)

Product weight . .. . .. .. . .. .. . .. .. 8 lbs (3.6 kg) per each

Shipping weight .. . .. .. .. . .. .. . .. 26 lbs (12 kg) per pair with mounting kit package

Listings .. .. . .. .. .. . .. .. . .. .. . .. .. . UL 2043, UL1480

Compliances .. .. . .. .. . .. .. .. . .. .. CE, NFPA90, NFPA70A

Warranty .. . .. .. .. . .. .. . .. .. . .. .. . . 5 years parts and labor

NOTE: All nominal levels are at ±10%. Specifications are subject to change without notice.

150 W continuous program

100 V: null, 60 W, 30 W, 15 W, 16 ohms direct

woofer, and crossover

Operating: +32 to +122 °F (0 to +50 °C) / 10% to 90%, noncondensing

7.5" (191 mm) from front of ceiling tile to back of rear enclosure

model Version d escriPtion PArt #

SI 26CT Ceiling - 8" Back Can, Pair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42-070-03

652