SF 26CT LP New

SoundField XD 6.5" Two-Way Ceiling Speaker with Low Profile Back Can
Key Features
  • 6.5" (165 mm) long throw woofer
    3/4" (19 mm) ferrofluid-cooled dome tweeter
  • New 4.2" (107 mm) deep low profile composite back can
  • Frequency range: 85 Hz to 20 kHz
    95° conical dispersion
  • 65 watts continuous pink noise
    130 watts continuous program
  • Locking arms support ceilings up to 2.25" (57.1 mm) thick
  • UL 2043 plenum rated enclosure
The Extron SF 26CT LP
Model Version Description Part #
SF 26CT LP 6.5" LowProfile 2-Way Ceiling Spkrs, Complete Pair 60-1881-03
BCK SF 26CT LP SF 26CT Low Profile back can only, Pair, 1 of 2 70-1283-01
DAK SF 26CT LP SF 26CT LP driver/baffle assembly only, Pair, 2of2 70-1283-03

The Extron SoundField® XD model SF 26CT LP is a low profile 6.5" two-way ceiling speaker featuring a 4.2" (107 mm) deep composite back can for use in restricted height plenum environments. The driver complement includes a 6.5" (165 mm) woofer coupled to a 3/4" (19 mm) ferrofluid-cooled dome tweeter. The SF 26CT LP offers both direct 8 ohm and 70/100 volt operation with a behind-the-grille, six position power selector switch. With high impedance taps at 8, 16, 32, and 64 watts, the SF 26CT LP is ideal for applications that require a high power distributed speaker system in plenum spaces that will not accommodate a taller back can.

The SF 26CT LP provides a wide and smooth frequency range of 85 Hz to 20 kHz and is engineered with a 95° conical dispersion that ensures excellent on and off axis voice intelligibility. A power rating of 130 watts continuous program also gives this speaker plenty of headroom for music reproduction in moderate to high output systems. 

Designed for Pro AV

The SF 26CT LP continues the new paradigm in speaker technology for pro AV applications that began wtih the Extron SF 26CT. With innovative materials, modular construction, and unique features, these SoundField XD speakers provide significant savings and superior performance.

Plenum Rated Composite Enclosure

The ideal speaker enclosure needs to be constructed in such a way as to avoid internal standing waves and resonances in the enclosure itself. It should also be lightweight and fire tested for use in plenum air-handling spaces. We were able to achieve all of these requirements by injection molding the enclosure with a fire resistant composite material. The result is a rigid, acoustically damped, lightweight, plenum rated enclosure that is UL 2043 listed.

Supports Division of Labor and Single Trade

Shipped as a complete speaker assembly, the SF 26CT LP is ideal for both single-trade and division-of-labor installations. The SF 26CT LP speaker can be installed by a single contractor as a self-contained unit for retrofits and new construction. For larger projects with multiple trades, the driver assembly and back can can be separated, allowing the rough-in contractor to install and fully terminate the back can. Once the job site is clean and secure, the AV integrator can then easily install the driver assembly and grille.

When there is to be an extended period of time between installation of the back can and driver assembly, they are available separately. BCK SF 26CT LP, part number 70-1283-01, for the back can. DAK SF 26CT, part number 70-1283-03, for the speaker baffle.

BCK and DAK options allow the speaker baffle to be purchased and installed at a later time compared to the back can. The BCK Back Can Kit can be installed early in the construction/installation process and covered with the provided paint shield.  Later, when the site is ready for finished products to be installed, the DAK Driver Assembly Kit can then be installed and covered with the speaker grille.

The BCK SF 26CT LP includes the following items for a pair of speakers:
  • Speaker enclosures - back cans
  • C-Rings
  • V-Rails
  • Paint Shields
The DAK SF 26CT includes the following items for a pair of speakers:
  • Driver assemblies
  • Round speaker grilles 

Magnetically Attached Modern Looking Grille

The SF 26CT LP features a finely perforated round metal grille with a thin-edged rounded bezel for a refined appearance on the ceiling. The grille securely attaches magnetically to the baffle and quickly snaps into place. An optional square grille is available with the same finely perforated metal and thin-edged rounded bezel. This gives the owner, architect, or interior designer an additional choice for matching the décor. The grille assemblies are white and can be painted to match the architectural elements of the environment.

Cable/Conduit Access Plate

The cable/conduit access plate is used to bring speaker cable into the enclosure, whether free-pulled or through flex conduit. The cable/conduit access plate has two punch-outs for ½” conduit, flex, or screw clamp fittings. A secondary punch-out allows easy daisy chaining from speaker to speaker when using conduit.

Opti-Torque Indicator Ring

The SF 26CT LP features exclusive Opti-Torque™ indicator rings that provide a visual indication when the locking arm screws have been sufficiently tightened, preventing damage to the speaker caused by overtightening. As the installation technician tightens the locking arms, the red Opti-Torque indicator ring will audibly snap when the proper torque has been applied. As a visual indicator, the red ring drops down onto the screwdriver shaft, signaling to the technician that the proper force has been applied.

Modular V-Rail and Foldable C-Rings

To facilitate installation in a T-bar ceiling, newly redesigned modular V-rail and foldable C-rings are included with the SF 26CT LP. The V-rails have been designed as a two-part assembly that can be snapped together in the field. The foldable C-rings have been designed to make them easier to maneuver into place, even in blind-mount drywall applications. The installer snakes the C-ring up through the speaker cut-out, unfolds it, and positions it as needed. The result is a continuous metal support around the entire cut-out, resulting in a more secure attachment to the ceiling.


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  SPK 14 14 AWG Speaker Cable
  SPK 16 16 AWG Speaker Cable
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  XPA U 1004C Four Channel Combo Amplifier
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  XPA U 1002 Two Channel Low and High Impedance Amplifiers
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  XPA U 1004 SB Four Channel Bridgeable Output Amplifier
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  XPA U 2002 SB Two Channel Bridgeable Output Amplifier
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  XPA 1002 Two Channel Low and High Impedance Amplifiers – 100 Watts Per Channel
  XPA 2001 Mono 70/100 V Amplifier - 200 Watts
  XPA 2003C Three Channel Combo Amplifier - 200 Watts Per Channel
  XPA 2004 Four Channel Amplifier - 200 Watts Per Channel
  XPA 4002 Two Channel Amplifier - 400 Watts Per Channel
  NetPA U 1004 Four Channel Power Amplifiers with Dante and DSP
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  NetPA U 1002 Two Channel Power Amplifiers with Dante and DSP
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Audio/acoustic and electrical
   Speaker type 2-way ceiling speaker with composite back can
   Frequency range 85 Hz to 20 kHz, -10 dB, half space (per IEC 60268-5)
   Frequency response 110 Hz to 6.5 kHz, +/−3dB, half space
   Power capacity 65 W (rms) continuous pink noise
130 W (rms) continuous program
   Rated maximum input voltage (MIV) 22.4 V (62.6 W at 8 ohms) (per AES2-2012)
   Maximum SPL 104 dB, 1 m (based on MIV)
106 dB, 1 m (linear)
   Nominal sensitivity 88 dB SPL, 1W, 1 m, half space
   Nominal impedance 8 ohms per speaker
   Crossover frequency 2.5 kHz
   Nominal coverage angle 95° conical coverage (1 kHz to 4 kHz)
      Woofer (1) 6.5" (165 mm) polypropylene cone with moisture resistant coating
      Tweeter (1) 0.75" (19.1 mm) PEI dome
   Rotary switch taps 70 V: 64 W, 32 W, 16 W, 8 W, 8 ohms direct
100 V: null, 64 W, 32 W, 16 W, 8 ohms direct
   Overload protection Full range power limiter with the 8 ohm direct input only, protecting the tweeter, woofer, and crossover
   Input connector (1) 5 mm captive screw connector, 4 pole for 1 input and 1 loop-through
   Package 2 speakers (1 pair)
   Included accessories Cutout template/paint shield, setup guide, mounting screws, 4 V-rails, 2 C-rings, 2 round grilles, 2 cable clamps, 2 captive screw connectors
   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
   Enclosure type Plenum rated, fire-resistant (UL94V-0) composite back can/baffle;
Magnetically attached powder-coated steel grille with plastic bezel.
   Enclosure outer dimensions 4.72” H x 10.64” diameter
(119.9 mm x 270.3 mm diameter)
4.2" H (106.7 mm H) from front of ceiling tile to back of rear enclosure
   Cutout dimensions 9.3" diameter
(236.2 mm diameter)
   Product weight 8.6 lbs (3.9 kg) each
   Regulatory compliance 
      Safety CE, UL 2043, UL1480, NFPA 90A, NFPA 70
UL Listed for use in plenum airspaces: 
UL 2043 listed for heat and smoke release,
UL 1480 listed for commercial and professional audio systems
      Environmental RoHS, WEEE
   Product warranty 5 years parts and labor
    NOTE     All nominal levels are at ±10%.
    NOTE     Specifications are subject to change without notice.
   Frequency Impedance graphs for SF 26CT LP
   Polar graphs for SF 26CT LP half space
Shipping Dimensions and Weights
    Part # Height Width Depth Weight
    60-1881-03 13.5" (34.3 cm) 13.0" (33.0 cm) 20.25" (51.4 cm) 25.15 lbs (11.41 kg)
    70-1283-01 13.5" (34.3 cm) 13.0" (33.0 cm) 20.25" (51.4 cm) 15.0 lbs (6.8 kg)
    70-1283-03 15.5" (39.4 cm) 12.5" (31.8 cm) 15.62" (39.7 cm) 14.0 lbs (6.35 kg)


Panel Drawing

Panel Drawing
© 2021 Extron. Specifications are subject to change without notice.