SI 28 Retired

Two-Way Surface Mount Speakers with 8" Woofer
Key Features
  • Exclusive conical horn design
  • 8 ohm nominal impedance
  • 1" (2.5 cm) ferrofluid-cooled, aluminum dome tweeter
  • 8" (20.3 cm) long-throw woofer with dual tuned bass reflex ports
  • Frequency range: 50 Hz to 20 kHz
  • 90 watts continuous pink noise, 180 watts continuous program
The Extron SI 28
Model Version Description Part #
 SI 28 Surface Mount - 8" Woofer, Black, Pair 42-073-02 Retired
 SI 28 Surface Mount - 8" Woofer, White, Pair 42-073-03 Retired

This product has been retired.
Suggested Replacement
SM 28

The Extron SI 28 two-way surface mount speaker features a ferrofluid-cooled, aluminum dome tweeter coupled to an Extron exclusive conical horn design for minimum phase shift and a flat response over the mid- and high-frequency ranges. Harsh tonal qualities due to cancellation in portions of the frequency range caused by phase shifting are all but eliminated with this exclusive conical horn design. A long-throw woofer with large magnets provides solid low-frequency response. This approach to crossover design assures a smooth transition from bass through midrange to the high frequencies, delivering optimum voice and music reproduction. An input power-limiting protection circuit is included for preventing woofer and tweeter damage due to overdriving.

This System INTEGRATOR® Series speaker is ideally suited for classrooms, conference rooms, and boardrooms.

The SI 28 features an 8" (20.3 cm) long-throw woofer, a 1" (2.5 cm) tweeter, 90 watts continuous pink noise and 180 watts continuous program capacity, and a frequency range from 50 Hz to 20 kHz. This speaker has a nominal impedance of 8 ohms with a durable, high-impact housing.

Included with the SI 28 is Extron's exclusive, patented V-Lock® mounting hardware, which facilitates easy, secure installations and allows for wide 60° horizontal and 55° vertical travel as well as 360° rotation. This flexible design allows the speakers to be placed vertically or horizontally to meet a variety of placement needs.

The SI 28 is sold in pairs and is available in a black or white finish, and includes a 5 year parts and labor warranty.