.png)
Extron
SF 228T Plus
Add paragraph text. Click “Edit Text” to update the font, size and more. To change and reuse text themes, go to Site Styles.
Main Features
2' x 2' (610 mm x 610 mm), 18.9 lbs (8.6 kg) drop-in ceiling tile speaker designed for US-style suspended ceilings
UL 2043 plenum rated enclosure
High performance coaxial driver with 8" (203 mm) long-throw woofer and 1.1" (28 mm) silk dome tweeter
Tuned bass reflex port for extended low frequency response
Rigid front baffle reduces unwanted enclosure resonances
Extron-exclusive enclosure weighs less than
20 pounds (9 kg)
Technical Specification
Thông số kỹ thuật | Chi Tiết |
|---|---|
Loại loa | 2‑way ceiling speaker |
Driver | Woofer 8" polypropylene, tweeter dome 1" |
Dải tần số | 47 Hz – 20 kHz (±3 dB) |
Công suất | 100 W liên tục, 200 W cực đại |
Độ nhạy | 90 dB SPL (1 W, 1 m) |
SPL tối đa | ~110 dB |
Trở kháng | 8 ohm |
Góc phủ âm | 95° conical |
Rotary switch taps | 70V: 64 W, 32 W, 16 W, 8 W, 8 ohm direct |
100V | 64 W, 32 W, 16 W, 8 ohm direct |
Woofer | 8" polypropylene cone phủ chống ẩm |
Tweeter | 1" PEI dome |
Bảo vệ quá tải | Power limiter (ngõ 8 ohm direct), bảo vệ tweeter, woofer và crossover |
Ngõ vào | captive screw connector 5 mm, 4 pole (1 input + 1 loop‑through) |
Đóng gói | 2 loa (1 cặp) |
Phụ kiện đi kèm | cutout template/paint shield, setup guide, mounting screws, V‑rails, C‑rings, round grilles, cable clamps, captive screw connectors |
Nhiệt độ/độ ẩm | Lưu trữ: –40 đến +70 °C, 10%–90% không ngưng tụ |
Hoạt động | 0 đến +50 °C, 10%–90% không ngưng tụ |
Lắp đặt | gắn trần với hardware đi kèm |
Loại enclosure | plenum rated, fire‑resistant (UL94V‑0) composite back can/baffle |
Lưới bảo vệ | thép sơn tĩnh điện, gắn bằng nam châm |
Kích thước | 5,9" H × 12,0" đường kính (150 × 305 mm) |
Cutout | 10,8" đường kính (274 mm) |
Trọng lượng | 11,2 lb (5,1 kg) mỗi loa |
Tuân thủ | CE, UL 2043, UL 1480, NFPA 90A, NFPA 70 |
Environmental | RoHS, WEEE |
Bảo hành | 5 năm (parts & labor) |
Product Overview
SF 228T Plus is the premium ceiling tile speaker in Extron’s SoundField series, designed for audio systems that require both music quality and speech clarity.
With a coaxial configuration including an 8-inch woofer and dome tweeter, it delivers more balanced, detailed, and powerful sound than smaller ceiling speakers or speech-focused models.
The 2’ × 2’ drop-in design allows direct installation into suspended ceilings without ceiling cutting, reducing installation time while maintaining a clean appearance.
Its bass-reflex design improves low-frequency performance, making SF 228T Plus suitable for high-quality background music and foreground music applications.
With support for 70V/100V and 8-ohm systems, high power handling, and wide frequency response, SF 228T Plus is an ideal choice for large meeting rooms, auditoriums, premium classrooms, high-end retail spaces, and commercial areas that require powerful, even, and higher-quality sound than standard ceiling speakers.