SI 3C LP Retired

Full-Range 8 Ohm Ceiling Speakers with 4" Low Profile Back Can
Key Features
  • 4" (10.2 cm) deep low profile metal back can for plenum environments
  • 3" (7.6 cm) full-range driver with a tuned port
  • 8 ohm nominal impedance
  • Frequency range: 75 Hz to 17 kHz
  • 16 watts continuous pink noise, 32 watts continuous program
  • Locking arms for quick ceiling installation
The Extron SI 3C LP
Model Version Description Part #
SI 3C LP Ceiling - 4" Back Can, Pair 42-103-13 Retired

This product has been retired.
Suggested Replacement

The Extron SI 3C LP is a full-range ceiling speaker featuring a 4" (10.2 cm) low profile metal back can for use in plenum ceilings. The low profile speaker is an excellent choice for ceiling installations with tight above-the-ceiling tile space issues, such as air handling units installed close to the ceiling. The 3" (7.6 cm) full-range driver features a wide frequency range of 75 Hz to 17 kHz, 16 watts continuous pink noise and 32 watts continuous program capacity, and an extremely wide conical dispersion of 170°. The SI 3C LP is ideal for small to medium classrooms with lower ceilings and low to medium power requirements.

The SI 3C LP features an exclusive conical baffle that provides a wider room coverage pattern, which is important for rooms with low ceilings. This design reduces beaming of mid and high frequencies directly under the speaker. Voice intelligibility is critical for classrooms, and the SI 3C LP provides excellent voice clarity without compromising music reproduction.

The SI 3C LP offers direct 8 ohm operation with overload protection. This speaker is ideal for use with our MPA 152 Plus Integrated Mini Power Amplifier in small to medium low ceiling installations requiring two to four wide dispersion speakers for maximum room coverage.

Four locking arms allow for a fast, secure hard ceiling installation. The SI 3C LP includes mounting hardware to facilitate installation in a suspended T-bar ceiling. It features a white grille and bezel that can be painted to match the architectural elements of the environment.


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SI 3C LP Ceiling Speaker
Audio/acoustic and electrical
   Speaker type Low profile ceiling speaker with metal back can
   Frequency response 75 Hz to 17 kHz, -10 dB, half space
   Power capacity 16 W continuous pink noise
32 W continuous program
   Nominal sensitivity 83 dB SPL, 1 W, 1 m, half space
   Nominal coverage angle 170° conical coverage
   Nominal impedance 8 ohms
   Driver (1) 3" (76 mm) paper cone
   Overload protection Full range power limiter
   Input connector (1) 5 mm captive screw connector, 4 pole for 1 input and 1 loop-through
   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 Ceiling mountable with included hardware:
V-rails for 2' x 4' (600 mm x 1200 mm) ceiling tiles, and C-rings
   Enclosure type Metal back can; high-impact, fire-resistant (UL94V-0) plastic baffle/rim
   Enclosure outer dimensions 4.0" H x 9.9" diameter
(102 mm x 251 mm diameter)
   Cutout dimensions 8.937" diameter
(227 mm diameter)
   Product weight Single: 5 lbs (2.3 kg)
   Shipping weight Pair: 19 lbs (9 kg) with mounting kit
   DIM weight, international 31 lbs (15 kg)
   Regulatory compliance 
      Safety CE, UL 2043, UL1480
   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.