SPEAKERS SF 228T TWO-WAY SOUNDFIELD CEILING TILE SPEAKERS WITH 8" WOOFER AND 7/1 V TRANSFORMER 2' x 2' (61 cm x 61 cm), 18.5 lb (8.4 kg) drop-in ceiling tile speaker for US style suspended ceilings UL 243 plenum rated enclosure 1" (2.5 cm) silk dome tweeter 8" (2.3 cm) long-throw woofer with tuned bass reflex port Front baffle design reduces unwanted enclosure resonances Extron-exclusive enclosure weighs less than 2 pounds (9 kg) White perforated grille matches appearance of air conditioning vents 8 ohm direct or 7/1 volt operation Frequency range: 5 Hz to 2 khz watts continuous pink noise, 12 watts continuous program 5.3" (13.5 cm) deep low profile enclosure for plenum environments 5 year parts and labor warranty Designed and manufactured by Extron 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.
DESCRIPTION The Extron SoundField SF 228T is a two-way ceiling tile speaker for low impedance and 7 volt/1 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 243 plenum rated, weighs less than 2 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 5 Hz to 2 khz for high fidelity music and speech reproduction. The SF 228T offers watts continuous pink noise and 12 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 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 UL 243 plenum rated enclosure 1" (2.5 cm) silk dome tweeter 8" (2.3 cm) long-throw woofer with a tuned bass reflex port Front baffle design reduces unwanted enclosure resonances Extron-exclusive enclosure weighs less than 2 pounds (9 kg) White perforated grille matches appearance of air conditioning vents 8 ohm direct or 7/1 volt operation with selectable power taps Frequency range: 5 Hz to 2 khz watts continuous pink noise, 12 watts continuous program 5.3" (13.5 cm) deep low profile enclosure for plenum environments 5 year parts and labor warranty 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 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 Rated A 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 243 listed for use in air handling spaces. The SF 228T is also UL 148 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. SPECIFICATIONS AUDIO/ACOUSTIC AND ELECTRICAL Speaker type 2-way, full-range, in-ceiling speaker Frequency range 5 Hz to 2 khz, -1 db, half space Power capacity W (rms) continuous pink noise (per IEC 268-5) 12 W (rms) continuous program Nominal sensitivity 89 db SPL, 1 watt, 1 m, half space Nominal coverage angle conical coverage Nominal impedance 8 ohms per speaker Crossover frequency 4.5 khz Woofer (1) 8 (23 mm) polypropylene cone with moisture resistant coating Tweeter (1) 1 (25 mm) silk dome Input connectors (1) 1 mm Euro-style captive screw terminal block, 7 pole (for transformer input) (1) 1 mm Euro-style captive screw terminal block, 2 pole (for direct 8 ohm input) Tap settings 7 V input 32 W, 16 W, 8 W, 4 W, 2 W, null (bypass 8 ohm direct connection) 1 V input Null, 32 W, 16 W, 8 W, 4 W, 2 W (bypass 8 ohm direct connection) GENERAL Package 2 speakers (1 pair) with 2 (61 cm) cross bars Temperature/humidity Storage: -4 to +158 F (-4 to +7 C) / 1% to %, noncondensing Operating: +32 to +122 F ( to +5 C) / 1% to %, 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 grille Enclosure outer dimensions 5.3" H x 23.75" W x 23.75" L (13.5 cm H x.3 cm W x.3 cm L) Product weight Single: 18.5 lbs (8.4 kg) Shipping weight Pair: 45 lbs (21 kg) with mounting kit Vibration ISTA 1A in carton (International Safe Transit Association) Regulatory compliance Safety CE, NFPAA, NFPA7; UL Listed for use in plenum airspaces: meets UL 243 for heat and smoke release, meets UL 148 for commercial and professional audio systems Environmental Complies with the appropriate requirements of RoHS, WEEE Warranty 5 years parts and labor NOTE: All nominal levels are at ±1%. Model Version Description Part number SF 228T Ceiling - 2x2 Drop-In, Transformer, Pair 42-168-3 For complete specifications, please go to www.extron.com Specifications are subject to change without notice.
UNIQUE FULL-RANGE CEILING TILE SPEAKER 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. Plenum Rated Enclosure meets UL 243 requirements for use in plenum airspaces Front Baffle Provides rigidity and stiffness to minimize vibrations Two-Way Design 1" silk dome tweeter and 8" long-throw woofer Ceiling Tile Enclosure Standard 2' x 2' size for direct placement into US-style suspended ceilings Lightweight Enclosure The baffle and lightweight housing together weigh less than 2 pounds or 9 kg. Tuned Bass Reflex Port Works together with the woofer and the large internal chamber for deep, authoritative bass output Full-Range Sonic Performance The SF 228T delivers a frequency range of 5 Hz to 2 khz. White Perforated Grille Matches appearance of air conditioning vents EASY TO INSTALL 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. 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.
POLAR GRAPHS 1/3 OCTAVE, HORIZONTAL 1. Hz 1. Hz 25. Hz 4. Hz 125. Hz 2. Hz 315. Hz 5. Hz 3 3-1 - -1-1 Hz - 2 Hz - 25 Hz - 5 Hz - 63. Hz 1. khz 1. khz 2.5 khz 8. Hz 1.25 khz 2. khz 3.15 khz 3 3-1 - -1-63 Hz - 1.25 khz - 1.6 khz - 3.15 khz - 4. khz 6.3 khz 1. khz 16. khz 5. khz 8. khz 12.5 khz 2. khz 3 3-1 - -1-4 khz - 8 khz - 1 khz - 2 khz -
RESPONSE GRAPHS - FREQUENCY AND IMPEDANCE SPL VS. FREQUENCY 1 WATT @ 1 METER RESPONSE, HALF SPACE (2π) dbspl 1 8 7 5 4 2 Hz 5 1 2 5 1K 2K 5K 1K 2K SPL VS. FREQUENCY HORIZONTAL OFF-AXIS RESPONSE, HALF SPACE (2π) dbspl 1 8 7 5 rees 1rees 2rees 3rees 4rees 4 2 Hz 5 1 2 5 1K 2K 5K 1K 2K IMPEDANCE VS. FREQUENCY Ohms 5 4 2 1 5 2 Hz 5 1 2 5 1K 2K 5K 1K 2K
PANEL DRAWINGS Top Bottom 23.75".325 cm 23.75".325 cm 5.3" 13.46 cm Side Worldwide Sales Offices Anaheim Raleigh Silicon Valley Dallas New York Washington, DC Toronto Mexico City Paris London Frankfurt Amersfoort Moscow Dubai Johannesburg New Delhi Bangalore Singapore Seoul Shanghai Beijing Tokyo UNITED STATES EUROPE ASIA MIDDLE EAST +8.633.9876 Inside USA/Canada +1.714.491.15 +8.3987.6673 Inside Europe +31.33.453.44 +8.7339.8766 Inside Asia +65.6383.44 +971.4.299.18 213 Extron Electronics. All rights reserved. All trademarks mentioned are the property of their respective owners. Prices and specifications subject to change without notice. 1213 68-2533-1 REV. A Letter - English - NP