Extron electronic SI 3CT LP User Manual

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SpeakerS

SI 3CT LP

FULL-RANGE CEILING SPEAKERS WITH

4" LOW PROFILE BACK CAN AND TRANSFORMER

n 3" (7.6 cm) full-range driver with a

tuned port

n 4" (10.2 cm) deep low proﬁle metal

back can for plenum environments

n Wide 170˚ conical dispersion

n 8 ohm direct, 70 volt, and

100 volt operation

n 6 position, behind-the-grille

power selector

n 16 watts continuous pink noise,

32 watts continuous program

n Locking arms for quick ceiling

installation

n UL plenum rated

n Includes C-ring & V-rail kit

n 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.

www.extron.com

DESCRIPTION SPECIFICATIONS

Front View

Side View

Rear View

Isometric View

9.88"

(25.1 cm)

8.39"

(21.3 cm)

8.77"

(22.3 cm)

4.00"

(10.2 cm)

0.57"

(1.44 cm)

The Extron SI 3CT LP is a full-range ceiling speaker featuring a 4" (10.2 cm) LP - Low Proﬁle metal back can for use in plenum ceilings. The low proﬁle speaker is an excellent choice for ceiling installations with tight above-theceiling tile space issues, such as air handling units installed close to the ceiling. The 3" (7.6 cm) full-range driver features an incredibly wide frequency response of 75 Hz to 17 kHz, 16 watts continuous pink noise or 32 watts continuous program capacity, and an extremely wide conical dispersion of 170°. The SI 3CT LP is ideal for small to medium classrooms with lower ceilings and low to medium power requirements.

The SI 3CT LP features an exclusive conical bafﬂe that provides a wider room coverage pattern, which is important for rooms with low ceilings. This design reduces “beaming” of mid and high frequencies directly under the speaker. Voice intelligibility is critical for classrooms and many other applications, and the SI 3CT LP provides excellent voice clarity without compromising music reproduction.

The SI 3CT LP offers both direct 8 ohm or 70/100 volt operation with a behind-the-grille, six position power selector switch. In the 8 ohm direct position, this speaker is designed for use with our MPA 122 Integrated Mini Power Ampliﬁer in small to medium low ceiling classrooms requiring two to four wide dispersion speakers for maximum room coverage.

Many system designers desire 70/100 volt operation for multiple speakers and long speaker wire runs when the ampliﬁer is remotely located. For small to medium classrooms, the SI 3CT LP is designed for use with the MPA 181T 70 volt Integrated Mini Power Ampliﬁer. For room balancing with 70/100 volt systems, the behind-the-grille power selector switch allows for 16, 8 ,4, 2, and 1 watt settings in 70 volt operation and 16, 8, 4, and 2 watt settings for 100 volt operation.

Four locking arms allow for a fast, secure hard ceiling installation. The SI 3CT LP includes mounting hardware to facilitate installation in a suspended T-bar ceiling. It features a white grille and bezel that can be painted to match

the architectural elements of the environment.

FEATURES

n 4" (10.2 cm) deep low proﬁle metal back can for plenum environments n 3" (7.6 cm) full-range driver with a tuned port n 8 ohm direct or 70/100 volt operation on a 6 position,

behind-the-grille selector:

- 8 ohm direct

- 70 volt: 16, 8, 4, 2, and 1 watt selectable

- 100 volt: 16, 8, 4, and 2 watt selectable

n Frequency response: 75 Hz to 17 kHz n 16 watts continuous pink noise, 32 watts continuous program n 170° conical dispersion n Locking arms for quick ceiling installation n UL plenum rated n Includes C-ring & V-rail kit n Grille and bezel are available in white only and may be painted

to match environment

n 5 year parts and labor warranty

Audio/Acoustic And electricAl

Speaker type ................................... Low proﬁle ceiling speaker with metal

back can

Frequency response ........................ 75 Hz to 17 kHz, -10 dB, half space

Power capacity ................................ 16 W continuous pink noise

32 W continuous program

Nominal sensitivity .......................... 83 dB SPL, 1 W, 1 m, 16 W tap, half space

Nominal coverage angle ................. 170° conical coverage

Nominal impedance ....................... 8 ohms

Rotary switch taps ........................... 70V: 16 W, 8 W, 4 W, 2 W, 1 W

100 V: null, 16 W, 8 W, 4 W, 2 W

Driver .............................................. 3" (76 mm) paper cone

Input connector ............................. (1) 5 mm captive screw connector, 4 pole

for 1 input and 1 loop-through

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 ........................................ Ceiling mountable with included hardware:

V-rails for 2' x 4' (600 mm x 1200 mm)

ceiling tiles, and C-rings

Enclosure type ................................ Metal back can; high-impact, ﬁre-resistant

(UL94V-0) plastic bafﬂe/rim

Enclosure outer dimensions ............ 4.0" H x 9.9" diameter

(102 mm x 251 mm diameter)

Cutout dimensions .......................... 8.937" diameter (227 mm diameter)

Product weight ............................... 6 lbs (2.7 kg) each

Shipping weight ............................. 22 lbs (10 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%.

Model Version Description Part Number

SI 3CT LP Ceiling Speakers - 4" Back Can, Pair ................ 42-103-03

DIMENSIONAL DRAWINGS

Ceiling Deck

Suspended Ceiling

SI 3CT LP

Full-Ra nge Ceiling Speakers with 4" Low Prole Back Can and Transformer

SI 3CT LP

Full-Ra nge Ceiling Speakers with 4" Low Prole Back Can and Transformer

HVAC Ducting

Shallow Plenum Return Air Space

Room Air Flow

Fire Sp rinkler Piping

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.

8" Back Can

Back Can

4" Low Proﬁle

SI 26CT

Two-Way Ceiling Speakers with

8" Back Can and Transformer

Full-Range Ceiling Speakers with 4" Low

SI 3CT LP

Proﬁle Back Can and Transformer Can

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

160.00 Hz

200.00 Hz

-90

-60

-30

0 Deg

-10

-20

-30

250.00 Hz

315.00 Hz

400.00 Hz 500 .00 Hz

-90

-60

-30

0 Deg

-10

-20

-30

630.00 Hz

800.00 Hz

1.00 kHz

1.25 kHz

-90

-60

-30

0 Deg

-10

-20

-30

1.60 kHz

2.00 kHz

2.50 kHz

3.15 kHz

-90

-60

-30

0 Deg

-10

-20

-30

4.00 kHz

5.00 kHz

6.30 kHz

8.00 kHz

-90

-60

-30

0 Deg

-10

-20

-30

10.00 kHz

12.50 kHz

16.00 kHz

20.00 kHz

-90

-60

-30

0 Deg

-10

-20

-30

Speciﬁcations are subject to change without notice.

20 Hz 50 100 200 500 1K 2K 5K 10K 20

dBSPL

100

0 Degrees 10 Degrees 20 Degrees 30 Degrees 40 Degrees

20 Hz 50 100 200 500 1K 2K 5K 10K 20

dBSPL

100

20 Hz 50 100 200 500 1K 2K 5K 10K 20

Ohm

RESPONSE GRAPHS – FREQUENCY AND IMPEDANCE

SPL VS. FREQUENCY – 1 WATT @ 1 METER RESPONSE, HALF SPACE (2π)

SPL VS. FREQUENCY – HORIZONTAL OFF-AXIS RESPONSE, HALF SPACE (2π)

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

TWO

IN-W

ALL LOUD

PEA

NIUM SW

8" WOOF

OOF

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 17 kHz

32 Watts Cont. Prog.

SI 26X

6.5" (16.5 cm) Woofer 50 Hz to 20 kHz

50 Watts Cont. Prog.

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 68-1158-01 REV. C

Extron electronic SI 3CT LP User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual