SI 26X Retired

Two-Way Open Back 8 Ohm Ceiling Speakers
Key Features
  • 8 ohm nominal impedance
  • 3/4" (1.9 cm) pivoting ferrofluid-cooled, titanium-coated dome tweeter
  • 6.5" (16.5 cm) long-throw woofer
  • Frequency range: 50 Hz to 20 kHz
  • 25 watts continuous pink noise, 50 watts continuous program
  • Locking arms for quick ceiling installation
The Extron SI 26X
Model Version Description Part #
SI 26X Ceiling - Open Back, Pair 42-067-03 Retired

This product has been retired.
Suggested Replacement
SF 26X

The Extron SI 26X is a two-way ceiling speaker featuring an open back and coaxial dual driver design for use in non-plenum airspace environments. A 6.5" (16.5 cm) long-throw woofer coupled to a 3/4" (1.9 cm) pivoting titanium-coated dome tweeter delivers accurate voice and music reproduction, as well as wide angle sound distribution. Wide dispersion characteristics make for a good choice in low ceiling applications. Special consideration is given to the crossover from the woofer to the tweeter, providing a smooth transition from low to mid frequencies. Voice reproduction from documentaries and live microphones is natural and clear sounding.

Music reproduction is enhanced with the exceptional low-frequency response of the long-throw woofer, which is specifically designed for infinite baffle environments, and provides an efficient low end response down to 50 Hz. The pivoting dome tweeter allows aiming of the mid and high frequencies for best area coverage and proper imaging. The overall frequency range for the SI 26X is 50 Hz to 20 kHz.

This System INTEGRATOR® Series speaker is ideally suited for overhead distributed audio applications for music and voice in classrooms, conference rooms, and boardrooms.

SI 26X speakers are sold in pairs and include a 5 year parts and labor warranty.

The SI 26X is designed for 8 ohm direct connection to power amplifiers, and may be connected for series or parallel operation. Four locking arms allow for a fast, secure hard ceiling installation. An optional C-ring and V-rail kit is available for use with soft ceiling tiles. The SI 26X features a white grille and bezel that can be painted to match the architectural elements of the environment.


  SPK 14 14 AWG Speaker Cable
  SPK 16 16 AWG Speaker Cable
  SPK 18 18 AWG Speaker Cable


SI 26X
Audio/acoustic and electrical
   Speaker type 2-way, open back ceiling speaker
   Frequency range 50 Hz to 20 kHz, -10 dB, half space
   Power capacity 25 W continuous pink noise
50 W continuous program
   Nominal sensitivity 89 dB, 1 W, 1 m, half space
   Nominal impedance 8 ohms
   Crossover frequency 3 kHz
   Nominal coverage angle 110° conical coverage
   Woofer (1) 6.5" (165 mm) polypropylene cone with moisture resistant coating
   Tweeter (1) 0.75" (19 mm) titanium dome
   Input connector 1 spring terminal clip pair
   Package 2 speakers (1 pair)
   Included accessories Cutout template, paint shield, user's manual, 2 dust covers
   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 Ceiling mountable with included hardware or optional ceiling tile C-ring
   Baffle type Plastic, open back, infinite baffle design
   Outer dimensions 3.25" H x 9.0" diameter
(83 mm x 228 mm diameter)
2.9" H (73 mm H) from front/bottom of the ceiling tile to the top of the woofer magnet
   Cutout dimensions 7.6" diameter
(194 mm diameter)
   Product weight Single: 2.6 lbs (1.2 kg)
   Shipping weight 8 lbs (4 kg) per pair
   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.