Extron electronic Speaker SI 3CT LP User Manual

SpeakerS  
SI 3CT LP  
n
n
3" (7.6 cm) full-range driver with a  
tuned port  
Full-Range Ceiling SPeakeRS WiTH  
4" (10.2 cm) deep low profile metal  
back can for plenum environments  
4" loW PRoFile BaCk Can and TRanSFoRmeR  
n
n
Wide 170˚ conical dispersion  
8 ohm direct, 70 volt, and  
100 volt operation  
n
n
n
6 position, behind-the-grille  
power selector  
16 watts continuous pink noise,  
32 watts continuous program  
Locking arms for quick ceiling  
installation  
n
n
n
UL plenum rated  
Includes C-ring & V-rail kit  
5 year parts and labor warranty  
The Extron SI 3CT LP is a full-range ceiling speaker featuring a low profile back  
can and transformer. A full-range driver, coupled to an exclusive conical baffle  
delivers very wide room coverage as well as wide frequency response for accurate  
voice and music reproduction. This System Integrator® Series speaker is ideally  
suited for small to medium classrooms with lower ceilings and low to medium  
power requirements.  
 
FeatureS  
Conical Baffle  
In small to medium-sized classrooms with low  
ceilings, midrange and high frequencies are  
likely to be confined or "beamed" within an area  
directly beneath each ceiling speaker. As a result,  
some listeners will hear the audio clearly while  
others may not.  
To address this issue, the SI 3CT LP has been  
designed with a 3 full-range driver that is  
"
acoustically coupled to an Extron exclusive conical  
baffle. This baffle serves as a waveguide to help  
create a wide dispersion profile of 170°. With this  
very broad conical spreading of the mid and high  
frequencies, a system of SI 3CT LP speakers will  
ensure consistent volume levels for everyone in the  
room while delivering increased intelligibility and  
accurate music reproduction.  
SI 26CT  
SI 3CT LP  
Two-Way Ceiling Speakers with  
8" Back Can and Transformer  
Full-Range Ceiling Speakers with 4" Low  
Profile Back Can and Transformer Can  
Ceiling Deck  
Shallow Plenum Return Air Space  
Fire Sprinkler Piping  
HVAC Ducting  
Suspended Ceiling  
SI 3CT LP  
SI 3CT LP  
Full-Range Ceiling  
Speakers with  
Full-Range Ceiling  
Speakers with  
4" Low Profile Back  
Can and Transformer  
4" Low Profile Back  
Can and Transformer  
Room Air Flow  
Low Profile Back Can  
The SI 3CT LP features a special 4" low profile back can for installation in plenum ceilings where the presence of HVAC ducting, fire  
sprinkler piping, or limited spacing above the suspended ceiling would hamper placement of a ceiling speaker with a more conventional  
back can such as the SI 26CT. The specially designed 3" full-range driver of the SI 3CT LP works together with the low profile back  
can to deliver wide frequency response as well as wide conical dispersion for optimal sound reproduction in classrooms and other  
environments.  
 
PoLar graPhS – 1/3 octaVe, horizontal  
100.00 Hz  
125.00 Hz  
250.00 Hz  
315.00 Hz  
160.00 Hz  
200.00 Hz  
400.00 Hz  
500 .00 Hz  
0 Deg  
0
0 Deg  
0
-30  
-30  
30  
30  
-10  
-10  
-60  
-60  
60  
60  
-20  
-30  
-20  
-30  
-90  
-90  
90  
90  
630.00 Hz  
800.00 Hz  
1.60 kHz  
2.00 kHz  
1.00 kHz  
1.25 kHz  
2.50 kHz  
3.15 kHz  
0 Deg  
0 Deg  
-30  
-30  
30  
30  
0
0
-10  
-20  
-30  
-10  
-20  
-30  
-60  
-60  
60  
60  
-90  
-90  
90  
90  
4.00 kHz  
5.00 kHz  
10.00 kHz  
12.50 kHz  
6.30 kHz  
8.00 kHz  
16.00 kHz  
20.00 kHz  
0 Deg  
0 Deg  
-30  
-30  
30  
30  
0
0
-10  
-20  
-30  
-10  
-20  
-30  
-60  
-60  
60  
60  
-90  
-90  
90  
90  
Specifications are subject to change without notice.  
 
reSPonSe graPhS – Frequency and imPedance  
SPL VS. Frequency – 1 Watt @ 1 meter reSPonSe, haLF SPace (2π)  
dBSPL  
100  
90  
80  
70  
60  
50  
40  
30  
20  
20 Hz  
50  
100  
200  
500  
1K  
2K  
5K  
10K  
20K  
SPL VS. Frequency – horizontaL oFF-axiS reSPonSe, haLF SPace (2π)  
dBSPL  
100  
90  
80  
70  
60  
50  
40  
30  
20  
0 Degrees  
10 Degrees  
20 Degrees  
30 Degrees  
40 Degrees  
20 Hz  
50  
100  
200  
500  
1K  
2K  
5K  
10K  
20K  
imPedance VS. Frequency  
Ohm  
40  
20  
10  
5
20 Hz  
50  
100  
200  
500  
1K  
2K  
5K  
10K  
20K  
 
SurFace SPeakerS  
SI 28  
SI 26  
6.5" (16.5 cm) Woofer  
1" (2.5 cm) Tweeter  
70 Hz to 20 kHz  
SI 3  
8" (20.3 cm) Woofer  
3" (7.6 cm) full range  
75 Hz to 17 kHz  
1" (2.5 cm) Tweeter  
50 Hz to 20 kHz  
32 Watts Cont. Prog.  
180 Watts Cont. Prog.  
150 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  
SI 3CT LP  
SI 26X  
3" (7.6 cm) Full Range  
75 Hz to 17 kHz  
6.5" (16.5 cm) Woofer  
50 Hz to 20 kHz  
32 Watts Cont. Prog.  
Plenum Rated 4" Back Can  
50 Watts Cont. Prog.  
in WaLL SPeakerS  
8W  
2
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ANIUM SW  
IT  
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1
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A
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SI 28W  
8" (20.3 cm) Woofer  
1" (2.5 cm) Tweeter  
30 Hz to 20 kHz  
SI 26W  
6.5" (16.5 cm) Woofer  
.75" (1.9 cm) Tweeter  
40 Hz to 20 kHz  
70 Watts Cont. Prog.  
60 Watts Cont. Prog.  
Extron Electronics, USA  
1230 South Lewis Street  
Anaheim, CA 92805  
800.633.9876 714.491.1500  
FAX 714.491.1517  
Extron Electronics, Europe  
Extron Electronics, Asia  
135 Joo Seng Rd. #04-01  
PM Industrial Bldg.  
Extron Electronics, Japan  
Beeldschermweg 6C, 3821 AH Amersfoort  
The Netherlands  
Kyodo Building, 16 Ichibancho  
Chiyoda-ku, Tokyo 102-0082  
Japan  
+800.3987.6673 +31.33.453.4040  
FAX +31.33.453.4050  
Singapore 368363  
+65.6383.4400 FAX +65.6383.4664  
+81.3.3511.7655 FAX +81.3.3511.7656  
07-05  
68-1158-01  
REV. C  
© 2007 Extron Electronics. All rights reserved. All trademarks mentioned are the property of their respective owners.  
 

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