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.