A 2' x 2' (61 cm x 61 cm), 18.5 lb (8.4 kg) TWO-WAY SOUNDFIELD … · 2013. 12. 19. · AND 70/100 V TRANSFORMER A 2' x 2' (61 cm x 61 cm), 18.5 lb (8.4 kg) drop-in ceiling tile speaker

SPEAKERS

SF 228T

The Extron SF 228T is a two-way ceiling tile speaker that delivers the

full frequency range and sonic performance of a standard freestanding

speaker, in a design optimized for easy installation into suspended ceilings.

It provides extended low frequency reproduction with deeper, more

authoritative bass output than traditional ceiling speakers. The SF 228T is

designed for fast and easy installation into sound systems requiring high

quality, wide bandwidth audio playback.

TWO-WAY SOUNDFIELD CEILING TILE SPEAKERS WITH 8" WOOFER

AND 70/100 V TRANSFORMER

A 2' x 2' (61 cm x 61 cm), 18.5 lb (8.4 kg) drop-in ceiling tile speaker for US style suspended ceilings

A UL 2043 plenum rated enclosure

A 1" (2.5 cm) silk dome tweeter

A 8" (20.3 cm) long-throw woofer with tuned bass reflex port

A Front baffle design reduces unwanted enclosure resonances

A Extron-exclusive enclosure weighs less than 20 pounds (9 kg)

A White perforated grille matches appearance of air conditioning vents

A 8 ohm direct or 70/100 volt operation

A Frequency range: 50 Hz to 20 kHz

A 60 watts continuous pink noise, 120 watts continuous program

A 5.3" (13.5 cm) deep low profile enclosure for plenum environments

A 5 year parts and labor warranty

A Designed and manufactured by Extron

Model Version Description Part numberSF 228T Ceiling - 2x2 Drop-In, Transformer, Pair 42-168-03

For complete specifications, please go to www.extron.comSpecifications are subject to change without notice.

SPECIFICATIONSAUDIO/ACOUSTIC AND ELECTRICALSpeaker type 2-way, full-range, in-ceiling speakerFrequency range 50 Hz to 20 kHz, -10 dB, half spacePower capacity 60 W (rms) continuous pink noise (per IEC 60268-5)

120 W (rms) continuous programNominal sensitivity 89 dB SPL, 1 watt, 1 m, half spaceNominal coverage angle 90˚ conical coverageNominal impedance 8 ohms per speakerCrossover frequency 4.5 kHzWoofer (1) 8” (203 mm) polypropylene cone with moisture resistant

coatingTweeter (1) 1” (25 mm) silk domeInput connectors (1) 10 mm Euro-style captive screw terminal block,

7 pole (for transformer input) (1) 10 mm Euro-style captive screw terminal block,  2 pole (for direct 8 ohm input)

Tap settings70 V input 32 W, 16 W, 8 W, 4 W, 2 W, null

(bypass 8 ohm direct connection)100 V input Null, 32 W, 16 W, 8 W, 4 W, 2 W

(bypass 8 ohm direct connection)

GENERALPackage 2 speakers (1 pair) with 2’ (61 cm) cross barsTemperature/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 Drops into 2' x 2' (61 cm x 61 cm) or 2' x 4' (61 cm x 122 cm) suspended tile ceilings

Enclosure type Composite, square, with metal grilleEnclosure outer dimensions 5.3" H x 23.75" W x 23.75" L

(13.5 cm H x 60.3 cm W x 60.3 cm L)Product weight Single: 18.5 lbs (8.4 kg)Shipping weight Pair: 45 lbs (21 kg) with mounting kitVibration ISTA 1A in carton (International Safe Transit Association)Regulatory complianceSafety CE, NFPA90A, NFPA70;

UL Listed for use in plenum airspaces: meets UL 2043 for heat and smoke release, meets UL 1480 for commercial and professional audio systems

Environmental Complies with the appropriate requirements of RoHS, WEEEWarranty 5 years parts and laborNOTE: All nominal levels are at ±10%.

The Extron SoundField® SF 228T is a two-way ceiling tile speaker for low impedance and 70 volt/100 volt systems. This Extron-exclusive design features a low profile, 2' x 2' (61 cm x 61 cm) by 5.3" (13.5 cm) deep enclosure that is UL 2043 plenum rated, weighs less than 20 pounds (9 kg), and drops directly into standard US style suspended ceilings, providing quicker installations. The two-way ported design includes an 8" (165 mm) woofer and a 1" (2.5 mm) silk dome tweeter that provides a frequency range of 50 Hz to 20 kHz for high fidelity music and speech reproduction. The SF 228T offers 60 watts continuous pink noise and 120 watts continuous program output. This speaker is sold in pairs and is designed for fast and easy installation into sound systems requiring high quality, wide bandwidth audio playback.

The SF 228T delivers the full frequency range and sonic performance of a standard freestanding speaker, in a design optimized for easy installation into US style suspended ceilings. It provides extended low frequency response with deeper, more authoritative bass output than from competitive ceiling speakers. This low frequency extension is achieved through a long-throw woofer mated to a tuned-port enclosure, plus a large transformer for distortion-free low frequency output.

For easy installation, the SF 228T drops into the same space as a standard 2' x 2' tile, and includes a T-bar for 2' x 4' ceilings. It also provides theft deterrence with a neutral white, perforated steel grille that matches the appearance of standard air conditioning vents and grid ceilings.

KEY FEATURES

A 2' x 2' (61 cm x 61 cm), 18.5 lb (8.4 kg) drop-in ceiling tile speaker designed for US style suspended ceilings

A UL 2043 plenum rated enclosure

A 1" (2.5 cm) silk dome tweeter

A 8" (20.3 cm) long-throw woofer with a tuned bass reflex port

A Front baffle design reduces unwanted enclosure resonances

A Extron-exclusive enclosure weighs less than 20 pounds (9 kg)

A White perforated grille matches appearance of air conditioning vents

A 8 ohm direct or 70/100 volt operation with selectable power taps

A Frequency range: 50 Hz to 20 kHz

A 60 watts continuous pink noise, 120 watts continuous program

A 5.3" (13.5 cm) deep low profile enclosure for plenum environments

A 5 year parts and labor warranty

A Designed and manufactured by Extron

Does Your Ceiling Speaker Really Meet UL Standards?Not all ceiling speakers on the market are UL listed. Those that are may be listed for commercial and professional use, but do not have the appropriate UL rating for installation and use in a plenum airspace. Because the space above a suspended tile ceiling is often

DESCRIPTION

used as a plenum air return for the HVAC system, it is essential that ceiling speakers have been properly tested and rated for minimal smoke and heat release in the event of a fire and to comply with building codes.

UL Listed and Plenum RatedA UL mark does not guarantee plenum applicability. Extron closed back ceiling speakers, however, are UL listed indicating they conform to specified safety standards. The SF 228T is UL 2043 listed for use in air handling spaces. The SF 228T is also UL 1480 listed for commercial and professional use. Always check a speaker’s certification on UL’s Web site, www.ul.com, and use the Online Certifications Directory tool before you specify it for a plenum ceiling application.

EASY TO INSTALL

Installation in three easy steps: (1) Remove ceiling tile, (2) Make wiring connections, (3) Place speaker on grid and anchor with seismic tabs. For 2' x 4' ceilings, trim ceiling tile, to fit with provided T-bar.

The inconspicuous white grille allows the SF 228T to blend into the ceiling.

The SF 228T is designed for quick and easy installation into standard US-style suspended tile ceilings. All that is necessary is to remove an existing ceiling tile, make the speaker wiring connections, and then place the SF 228T onto the T-bar support grid. Multiple seismic tabs simplify speaker anchoring. The process requires minimal effort and time without any pre-installation procedures necessary for the typical round speaker, such as cutting holes through ceiling tiles and mounting supporting hardware.

If installing into a 2' x 4' ceiling, simply cut the existing ceiling tile to fill out the space adjacent to the speaker and the included T-bar. The end result is a clean and inconspicuous speaker system that requires just minutes to install.

The SF 228T features an exclusive ceiling tile speaker design for full-range sonic reproduction. The enclosure is specially engineered with a large volume chamber for extended bass response. The front baffle design minimizes enclosure vibrations and optimizes sound quality. A lightweight housing allows the SF 228T to meet ceiling-mounting codes without additional permits. The SF 228T delivers full-range sonic performance comparable to a freestanding speaker, with a form factor and essential features ideal for installation in suspended ceilings.

UNIQUE FULL-RANGE CEILING TILE SPEAKER

Plenum RatedEnclosure meets UL 2043 requirements for use in plenum airspaces

Front BaffleProvides rigidity and stiffness to minimize vibrations

Lightweight EnclosureThe baffle and lightweight housing together weigh less than 20 pounds or 9 kg.

Tuned Bass Reflex PortWorks together with the woofer and the large internal chamber for deep, authoritative bass output

White Perforated GrilleMatches appearance of air conditioning vents

Two-Way Design1" silk dome tweeter and 8" long-throw woofer

Full-Range Sonic PerformanceThe SF 228T delivers a frequency range of 50 Hz to 20 kHz.

Ceiling Tile EnclosureStandard 2' x 2' size for direct placement into US-style suspended ceilings

POLAR GRAPHS – 1/3 OCTAVE, HORIZONTAL

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315.00 Hz

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630.00 Hz

800.00 Hz

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2.50 kHz

3.15 kHz

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6.30 kHz

8.00 kHz

10.00 kHz

12.50 kHz

16.00 kHz

20.00 kHz

100 Hz - 200 Hz

630 Hz - 1.25 kHz

4 kHz - 8 kHz

250 Hz - 500 Hz

1.6 kHz - 3.15 kHz

10 kHz - 20 kHz

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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

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© 2013 Extron Electronics. All rights reserved. All trademarks mentioned are the property of their respective owners. Prices and specifications subject to change without notice.

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12-201368-2533-01 REV. ALetter - English - NP

PANEL DRAWINGS

5.30"13.46 cm

23.75"60.325 cm

23.75"60.325 cm

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