SI 3 Retired

Compact Full-Range Surface Mount Speakers
Key Features
  • Compact full-range speaker
  • 8 ohm nominal impedance
  • 3" (7.6 cm) full-range driver with a tuned bass reflex port
  • Frequency response: 75 Hz to 18 kHz
  • 16 watts continuous pink noise, 32 watts continuous program
  • Exclusive V-Lock® mounting system included, provides horizontal and vertical speaker mounting
The Extron SI 3
Model Version Description Part #
SI 3 Surface Mount - 3" Driver, Black, Pair 42-105-02 Retired
SI 3 Surface Mount - 3" Driver, White, Pair 42-105-03 Retired

This product has been retired.
Suggested Replacement
SM 3

The Extron SI 3 compact surface mount speaker features a 3" (7.6 cm) full-range driver coupled to an exclusive conical baffle that enhances coverage throughout the listening area. The driver features an incredibly wide frequency response of 75 Hz to 18 kHz, and 16 watts continuous pink noise and 32 watts continuous program capacity. An internal overload protection circuit prevents driver damage due to excessive input levels.

This System INTEGRATOR® Series speaker is ideally suited for small to medium classrooms and conference rooms where surface mount speakers are desired, but wall space for speaker placement is limited.


The exclusive conical baffle provides a broad dispersion of the mid and high frequencies in order to optimize room coverage from a compact speaker. Voice intelligibility is critical for classrooms and many other applications, and the SI 3 provides excellent voice clarity without compromising music reproduction.


Included with the SI 3 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 3 is sold in pairs and is available in a black or white finish, and includes a 5 year parts and labor warranty.


  V-Lock Replacement V-Lock® Wall Assembly for Extron Surface Mount Speakers
  SPK 14 14 AWG Speaker Cable
  SPK 16 16 AWG Speaker Cable
  SPK 18 18 AWG Speaker Cable


SI 3 Surface Mount Speaker
Audio/acoustic and electrical
   Speaker type Full range surface mount speaker
   Frequency range 75 Hz to 18 kHz, -10 dB, full space
   Power capacity 16 W continuous pink noise
32 W continuous program
   Nominal sensitivity 83 dB SPL, 1W, 1 m, full space
   Nominal impedance 8 ohms
   Driver (1) 3" (76.2 mm) paper cone
   Overload protection Full range power limiter
   Input connector (1) 2-pin spring terminal
   Package 2 speakers (1 pair)
   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 Vertically and horizontally wall mountable with included wall mountable V-lock brackets
    NOTE     V-lock brackets can be angled up to 20° upward, 35° downward, 30° to the left, 30° to the right, and rotated 360°.
   Enclosure type Plastic, trapezoidal, with metal grille and bass reflex ports
   Enclosure outer dimensions 8.75" H x 5.75" W x 5.6" D
(22.2 cm H x 14.6 cm W x 14.2 cm D)
   Product weight Single: 4.0 lbs (1.8 kg)
   Product warranty 5 years parts and labor
    NOTE     All nominal levels are at ±10%.
    NOTE     Specifications are subject to change without notice.


Application Diagram

Panel Drawing

Panel Drawing
© 2020 Extron. Specifications are subject to change without notice.