SF 228T

Two-Way SoundField Ceiling Tile Speakers with 8" Woofer and 70/100 V Transformer
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 2043 plenum rated enclosure
  • 1" (25 mm) silk dome tweeter
  • 8" (203 mm) long-throw woofer with a tuned bass reflex port
  • Front baffle design reduces unwanted enclosure resonances
  • Extron-exclusive enclosure weighs less than
    20 pounds (9 kg)
The Extron SF 228T
Model Version Description Part #
SF 228T Ceiling - 2' x 2' Drop-In, Transformer, Pair 42-168-03

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" (203 mm) woofer and a 1" (25 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 an extended low frequency range 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.

The front panel design provides the rigidity and stiffness to minimize enclosure vibrations that would otherwise compromise sound quality. A lightweight housing is utilized to create an enclosure that balances improved acoustic performance with installation safety. The SF 228T weighs less than 20 pounds (9 kg), allowing the speaker to meet ceiling-mounting codes without additional permits when installed in classrooms.

The SF 228T offers 70 volt or 100 volt operation and provides power taps for 32, 16, 8, 4, and 2 watts. The power taps are accessed via speaker wiring connections inside the rear panel. The transformer can be bypassed for 8 ohm operation.

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.

Features

OPTIONAL ACCESSORIES
  SPK 14 14 AWG Speaker Cable
  SPK 16 16 AWG Speaker Cable
  SPK 18 18 AWG Speaker Cable
RELATED AMPLIFIERS
  XPA U 1004 Four Channel Low and High Impedance Amplifiers
100 Watts Per Channel
  XPA U 1004C Four Channel Combo Amplifier
100 Watts Per Channel
  XPA 1002 Two Channel Low and High Impedance Amplifiers – 100 Watts Per Channel
  XPA 2001 Mono 70/100 V Amplifier - 200 Watts
  XPA 2002 Two Channel Amplifier - 200 Watts Per Channel
  XPA 2003C Three Channel Combo Amplifier - 200 Watts Per Channel
  XPA 2004 Four Channel Amplifier - 200 Watts Per Channel
  XPA 4002 Two Channel Amplifier - 400 Watts Per Channel
  NetPA 1001-70V AT Mono 70 V Audio Power Amplifier with Dante - 100 Watts
  NetPA 502 AT Two Channel Audio Power Amplifier with Dante - 50 Watts Per Channel
RELATED PRODUCTS
  CS 3T Full-Range Open Back Ceiling Speakers with 70/100 V Transformer
  CS 123T Full-Range 70/100 V SpeedMount Ceiling Speaker System
  CS 26T Plus Two-Way Open Back Ceiling Speakers with 70/100 V Transformer
  CS 1226T Plus Two-Way 70/100 V SpeedMount Ceiling Speaker System
  FF 120T Full-Range Flat Field Speakers with 1' x 2' Low Profile Enclosure and 70/100 V Transformer
  FF 220T Full-Range Flat Field Speakers with Low Profile Enclosure and 70/100 V Transformer
  SM 3 SpeedMount Compact Full-Range Surface Mount Speakers
  SM 26 SpeedMount Two-Way Surface Mount Speakers with 6.5" Woofer
  SM 28 SpeedMount Two-Way Surface Mount Speakers with 8" Woofer

Specifications

SF 228T
Audio/acoustic and electrical
   Speaker type 2-way, full-range, in-ceiling speaker
   Frequency range 50 Hz to 20 kHz, -10 dB, half space
   Power capacity 60 W (rms) continuous pink noise (per IEC 60268-5)
120 W (rms) continuous program
   Nominal sensitivity 89 dB SPL, 1 watt, 1 m, half space
   Nominal coverage angle 90° conical coverage
   Nominal impedance 8 ohms per speaker
   Crossover frequency 4.5 kHz
   Woofer (1) 8" (203 mm) polypropylene cone with moisture resistant coating
   Tweeter (1) 1" (25 mm) silk dome
   Input 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 settings 
      70 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)
General
   Package 2 speakers (1 pair) with 2' (61 cm) cross bars
   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 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 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 kit
   Vibration ISTA 1A in carton (International Safe Transit Association)
   Regulatory compliance 
      Safety 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, WEEE
   Product warranty 5 years parts and labor
    NOTE     All nominal levels are at ±10%.
    NOTE     Specifications are subject to change without notice.
   
   
(8.0-091112-D4)
Shipping Dimensions and Weights
    Part # Height Width Depth Weight
    42-168-03 26.0" (66.0 cm) 27.25" (69.2 cm) 11.87" (30.1 cm) 44.0 lbs (19.96 kg)

Diagram

Application Diagram

Panel Drawing

Panel Drawing
© 2019 Extron. Specifications are subject to change without notice.