Extron SF 26CT User manual

SPEAKERS

SF 26CT Series

SOUNDFIELD XD 6.5" TWO-WAY CEILING SPEAKERS

FOR PLENUM ENVIRONMENTS

The Extron SoundField® XD SF 26CT models are 6.5"

two-way ceiling speakers for use in standard or restricted

height ceiling environments. With the AV industry's first

UL 2043 listed composite speaker enclosure, the SF

26CT series meets stringent UL requirements for smoke

and heat release in plenum air spaces. A magnetically

attached grille with a thin-edged bezel gives the SF

26CT series a refined appearance on the ceiling. The

SF 26CT series offers direct 8 ohm and 70/100 volt

operation with a behind-the-grille, six position power

tap selector switch. With high impedance taps at 8, 16,

32, and 64 watts, the SF 26CT series can be used in

applications where a high power distributed speaker

system is needed.

A 6.5" (165·mm) long throw woofer

A 3/4" (19·mm) ferrofluid-cooled dome tweeter

A Two models available:

- SF 26CT Standard 8" (203 mm) back can

- SF 26CT LP Low profile 4.2" (107 mm) back can

A 130 watts continuous program

A 8 ohm direct or 70/100 volt operation

A Locking arms support ceilings up to 2.25" (57.1 mm)

thick

A UL 2043 plenum rated enclosure

FEATURESDESCRIPTION

The SF 26CT series provides a wide and smooth frequency
range and is engineered to ensure 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 series represents a paradigm shift in speaker
technology for pro AV applications. We designed these models from
the ground up with innovative materials, modular construction, and
unique features, to provide significant cost savings and superior
performance.

Voicing Consistency

The SF 26CT Series is voiced consistently with the Extron SF 26PT
pendant speaker to ensure smooth sonic transitions in applications
when the listener moves between drop-ceiling and open-ceiling
areas.

Plenum Rated Composite Enclosure

The ideal speaker enclosure is constructed in such a way as to
avoid internal standing waves and resonances in the enclosure itself.
It must also be lightweight and fire tested for use in plenum air­handling 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.

Magnetically Attached Aesthetically Pleasing Grille

The SF 26CT series 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 grilles are white and can be painted to
match the architectural elements of the environment.

A 6.5" (165·mm) long throw woofer

A 3/4" (19·mm) ferrofluid-cooled dome tweeter

A Two models available:

- Standard 8" (203 mm) back can

- Low profile 4.2" (107 mm) back can

A Frequency range:

SF 26CT: 65 Hz to 22 kHz
SF 26CT LP: 85 Hz to 20 kHz

A Conical dispersion

SF 26CT: 111°
SF 26CT LP: 95°

A 65 watts continuous pink noise,

130 watts continuous program

A 8 ohm direct or 70/100 volt operation on a 6 position,

behind-the-grille selector:

- 8 ohm direct

- 70 volt: 64, 32, 16, and 8 watt selectable

- 100 volt: 64, 32, and 16 watt selectable

A Magnetically attached grille with a thin bezel for a refined

appearance

A Grille and bezel are white and can be painted to match any

environment

A Separable back can and baffle supports both single-trade

and division-of-labor applications

A Modular V-rail and folding C-ring kit included
A Opti-Torque indicator rings prevent overtightening of locking

arm screws

A Locking arms support ceilings up to 2.25" (57.1 mm) thick

A UL 2043 plenum rated enclosure

A 5-year parts and labor warranty

Low Profile Back Can - SF 26CT LP

The SF 26CT LP features a 4.2" (107 mm) back can for installation
into restricted height plenum environments. This model can be used
for entire installations or in combination with the similarly voiced
SF 26CT and SF 26PT models, as architecturally required.

Optional Square Grille Kit

The SGK SF26C is for applications

with square design elements

THE CEILING SPEAKER REIMAGINED

The SF 26CT series represents a paradigm shift in speaker technology for pro AV applications. Designed from the ground up with innovative
materials, modular construction, and unique features, these SoundField XD speakers provide significant savings and superior performance.

Cable/Conduit Access Plate

Rotatable for top or side access
on the SF 26CT

SF 26CT

UL 2043 Plenum Rate

The AV industry’s first plenum
rated composite enclosure

Lightweight Enclosure

Composite enclosure reduces
weight impact on ceiling structure

Opti-Torque Indicator Rings

Prevents damage from
overtightening the locking arms

Separable Back Can and Baffle

Supports single-trade and division-of-labor
installations

6.5" Woofer

6.5" (165 mm) long throw woofer
with a tuned bass reflex enclosure

Easily Accessible Tap Selector

Configurable for 70/100V operation or
8 ohm direct after installation

3/4" Tweeter

3/4" (19 mm) ferrofluid cooled,
bridge mounted dome tweeter

Magnetically Attached Grille

Sleek looking, easy to securely
install, and paintable

Cable/Conduit
Access Plate

Designed for top access
on the SF 26CT LP

SF 26CT LP

Low Profile Back Can

The SF 26CT LP is designed to
fit in restricted height spaces

Opti-Torque Indicator Rings

Prevents damage from overtightening
the locking arms

6.5" Woofer

6.5" (165 mm) long throw woofer

DESIGNED FOR THE INTEGRATOR

Two-Piece Design for Installation Flexibility

Shipped as a complete speaker assembly, the SF 26CT series is ideal for both single-trade and division-of-labor
installations. The complete 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 back can and speaker baffle 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 speaker baffle and grille. For both models, the back can and speaker
baffle are available separately for installations with a long period of time between rough-in and final installation.

Mixed Height Plenum Spaces and Consistent Voicing

The application diagram shown below illustrates the use of SF 26CT and SF 26CT LP models within a room when some areas of the room
have restricted plenum space. Since the models of the SF 26CT series are voiced consistently with each other, and use the same drivers,
audible transitions between areas of the room can be minimized.

Audio Audio

Extron
SF 26CT LP

Ceiling Speakers

Extron
SF 26CT

Ceiling Speakers

Extron
NetPA U 1002-70V

Power Amplier

Wireless Mic 1

Wireless Mic 2

OVER
TEMP

21

LIMITER/PROTECT

SIGNAL

Audio Line

t

muteselec

Inputs

NetPA U 1002 SERIES

Ethernet

Audio Line Outs

Assistive Listening
System Transmitter

t

muteselec

Extron
WPD 101 3.5 mm

AUDIO

Single Gang
Pa s s -T hro u g h
Wallplate

MODULAR V-RAILS AND FOLDABLE C-RINGS

To facilitate installation in a T-bar ceiling, modular V-rails and foldable C-rings are included with the SF 26CT series. The V-rails have been
designed as a two-part assembly that can be snapped together in the field.

Put Two Pieces Together at 90˚ Angle

Straighten to 180˚ Angle

V-Rail Locks into Place

The foldable C-rings have been designed to make it easier to get them into place, even in blind-mount drywall applications. Snake the C-ring
up through the speaker cut-out hole, unfold it, and position it as needed. The result is a continuous metal support around the entire cut-out,
resulting in a more secure attachment to the ceiling.

Insert C-Ring in Ceiling

Spread Open C-Ring

Lay Flat

Opti-Torque Indicator Rings

The SF 26CT series 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. When the installation technician is tightening the locking
arms, the red Opti-Torque™ indicator ring audibly snaps 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.

70 V

8W

32W

64W

16W

OFF

8Ω

8Ω

OFF

64W

16W

32W

100 V

Opti-Torque Indicator Ring drops onto screwdriver shaft

SF 26CT – RESPONSE GRAPHS – FREQUENCY AND IMPEDANCE

SF 26CT RESPONSE GRAPHS – FREQUENCY AND IMPEDANCE

SPL vs. FREQUENCY – 1 WATT @ 1 METER RESPONSE, HALF SPACE (2π)

20 Hz 50 100 200 500 1K 2K 5K 10K 20K

dBSPL

40

50

60

70

80

90

100

20 Hz 50 100 200 500 1K 2K 5K 10K 20K

dBSPL

40

50

60

70

80

90

100

20 Hz 50 100 200 500 1K 2K 5K 10K 20K

dBSPL

40

50

60

70

80

90

100

0 Degrees
10 Degrees
20 Degrees
30 Degrees
40 Degrees

SPL VS. FREQUENCY – 1 WATT @ 1 METER RESPONSE, HALF SPACE (2π)

dBSPL

100

90

80

70

60

50

40

20 Hz 50 100 200 500 1K 2K 5K 10K 20K

SPL VS. FREQUENCY – HORIZONTAL OFF-AXIS RESPONSE, HALF SPACE (2π)

IMPEDANCE VS. FREQUENCY

dBSPL

100

90

80

70

60

50

40

20 Hz 50 100 200 500 1K 2K 5K 10K 20K

Ohms

50

0 Degrees
10 Degrees
20 Degrees
30 Degrees
40 Degrees

40

30

20

10

0

20 Hz 50 100200 5001K2K5K10K 20K

SF 26CT – POLAR GRAPHS – 1/3 OCTAVE, Horizontal

SF 26CT POLAR GRAPHS – 1/3 OCTAVE, HORIZONTAL

100.00 Hz

125.00 Hz

160.00 Hz

200.00 Hz

0 Deg.

-30

-60

1.00 kHz

1.25 kHz

-90

90

60

90

30

630.00 Hz

800.00 Hz

0

-10

-20

-30

100 Hz - 200 Hz100 Hz - 200 Hz

250.00 Hz

315.00 Hz

60

1.60 kHz

2.00 kHz

0 Deg.

30

250 Hz - 500 Hz

0

-10

-20

-30

400.00 Hz

500.00 Hz

-30

-60

-90

2.50 kHz

3.15 kHz

90

60

4.00 kHz

5.00 kHz

60

0 Deg.

30

0

-10

-20

-30

630 Hz - 1.25 kHz

0 Deg.

30

0

-10

-20

-30

-30

-30

-60

6.30 kHz

8.00 kHz

-60

-90

60

90

60

30

10.00 kHz

12.50 kHz

30

0 Deg.

0

-10

-20

-30

1.6 kHz - 3.15 kHz

0 Deg.

0

-10

-20

-30

-30

-60

-90

16.00 kHz

20.00 kHz

-30

-60

90

4 kHz - 8 kHz

-90

Specifications are subject to change without notice.

90

10 kHz - 20 kHz

-90

SF 26CT LP – RESPONSE GRAPHS - FREQUENCY AND IMPEDANCE

SPL VS. FREQUENCY – 1 WATT @ 1 METER RESPONSE, HALF SPACE (2π)

dBSPL

100

90

80

70

60

50

40

20 Hz 50 100200 5001K2K5K10K 20K

SPL VS. FREQUENCY – HORIZONTAL OFF-AXIS RESPONSE, HALF SPACE (2π)

dBSPL

100

90

80

70

60

50

40

20 Hz 50 100200 5001K2K5K10K 20K

0 Degrees
10 Degrees
20 Degrees
30 Degrees
40 Degrees

IMPEDANCE VS. FREQUENCY

Ohms

50

40

30

20

10

0

20 Hz 50 100200 5001K2K5K10K 20K

SF 26CT LP – POLAR GRAPHS - 1/3 OCTAVE, HORIZONTAL

SF 26CT LP POLAR GRAPHS – 1/3 OCTAVE, HORIZONTAL

160.00 Hz

200.00 Hz

-30

-60

-90

90

100.00 Hz

125.00 Hz

60

30

0 Deg.

0

-10

-20

-30

250.00 Hz

315.00 Hz

60

90

100 Hz - 200 Hz

630.00 Hz

800.00 Hz

1.00 kHz

1.25 kHz

1.60 kHz

2.00 kHz

0 Deg.

30

250 Hz - 500 Hz

0

-10

-20

-30

400.00 Hz

500.00 Hz

-30

-60

-90

2.50 kHz

3.15 kHz

90

60

4.00 kHz

5.00 kHz

60

0 Deg.

30

0

-10

-20

-30

630 Hz - 1.25 kHz

0 Deg.

30

0

-10

-20

-30

-30

-30

-60

6.30 kHz

8.00 kHz

-60

-90

90

60

10.00 kHz

12.50 kHz

60

0 Deg.

30

0

-10

-20

-30

1.6 kHz - 3.15 kHz

0 Deg.

30

0

-10

-20

-30

-30

-60

-90

16.00 kHz

20.00 kHz

-30

-60

90

4 kHz - 8 kHz

-90

Specifications are subject to change without notice.

90

10 kHz - 20 kHz

-90

SF 26CT - PANEL DRAWINGS

SF 26CT

10.64"

(270 mm)

Front

9.25"

(235 mm)

100 V

16W

32W

64W

OFF

8
Ω

OFF

8Ω

64W

32W

16W

8W

70 V

11.09"

(282 mm)

Grille

Rear

9.30"

(236 mm)

Cutout

8.00"

(203 mm)

0.46"

(12 mm)

0.35"

(8.9 mm)

Side

11.09"

(282 mm)

Grille

SF 26CT LP - PANEL DRAWINGS

SF 26CT LP

10.64"

(270 mm)

100 V

16W

32W

64W

OFF

8
Ω

OFF

8Ω

64W

32W

16W

8W

70 V

Front

9.25"

(235 mm)

11.09"

(282 mm)

Grille

Rear

9.30"

(236 mm)

Cutout

4.20"

(107 mm)

0.46"

(12 mm)

0.35"

(8.9 mm)

Side

11.09"

(282 mm)

Grille

SPECIFICATIONS

SF 26CT SF 26CT LP

AUDIO/ACOUSTIC AND ELECTRICAL

Speaker type 2-way ceiling speaker with composite back can
Frequency range 65 Hz to 22 kHz, -10 dB, half space (per IEC 60268-5)
Frequency response 88 Hz to 22 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
Nominal coverage angle 111° conical coverage (1 kHz to 4 kHz)
Drivers

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

GENERAL

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 8.34" H x 10.64" diameter

(211.8 mm x 270.3 mm diameter)

8.0" H (203.2 mm H) from front of ceiling tile to back of
rear enclosure

Cutout dimensions 9.3" diameter

(236.2 mm diameter)

Product weight 9.4 lbs (4.3 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%.

Model Version Description Part Number

SF 26CT 6.5" 2-Way Ceiling Spkrs, 70/100V, Complete Pair 60-1310-03
BCK SF 26CT SF 26CT back can only, pair, 1 of 2 70-1268-01
DAK SF 26CT SF 26CT driver/baffle assembly only, pair, 2 of 2 70-1268-03

For complete specifications, please go to www.extron.com

Specifications are subject to change without notice.

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

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)

Nominal sensitivity 88 dB SPL, 1W, 1 m, half space
Nominal impedance 8 ohms per speaker
Nominal coverage angle 95° conical coverage (1 kHz to 4 kHz)
Drivers

Woofer (1) 6.5" (165 mm) polypropylene cone with moisture

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

Overload protection Full range power limiter with the 8 ohm direct input only,

Input connector (1) 5 mm captive screw connector, 4 pole for 1 input and

GENERAL

Package 2 speakers (1 pair)
Included accessories Cutout template/paint shield, setup guide, mounting

Temperature/humidity Storage: -40 to +158 °F (-40 to +70 °C) /

Mounting Ceiling mountable with included hardware
Enclosure type Plenum rated, fire-resistant (UL94V-0) composite back

Enclosure outer dimensions 4.72” H x 10.64” diameter

Cutout dimensions 9.3" diameter

Product weight 8.6 lbs (3.9 kg) each
Regulatory compliance

Safety CE, UL 2043, UL1480, NFPA 90A, NFPA 70

Environmental RoHS, WEEE

Product warranty 5 years parts and labor
NOTE:

All nominal levels are at ±10%.

Model Version Description Part Number

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

For complete specifications, please go to www.extron.com

130 W (rms) continuous program

106 dB, 1 m (linear)

resistant coating

100 V: null, 64 W, 32 W, 16 W, 8 ohms direct

protecting the tweeter, woofer, and crossover

1 loop-through

screws, 4 V-rails, 2 C-rings, 2 round grilles, 2 cable
clamps, 2 captive screw connectors

10% to 90%, noncondensing
Operating: +32 to +122 °F (0 to +50°C) /
10% to 90%, noncondensing

can/baffle;
Magneticallyattached powder-coated steel grille with
plastic bezel.

(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

(236.2 mm diameter)

UL Listed for use inplenum airspaces:
UL 2043 listed for heat and smoke release,
UL 1480 listed for commercial and professional audio
systems

Specifications are subject to change without notice.

WORLDWIDE SALES OFFICES

Anaheim • Raleigh • S ilicon Valley • Dallas • New York • Washington, DC • Toronto • Mexi co City • Par is

London • Frankfurt • Madrid • Stockholm • Amersfoort • Moscow • Dubai • Johanne sbu rg • Tel Aviv • Sydney

Melbourne • Bangalore • Mumbai • New De lhi • Singapore • Seoul • Shanghai • Beijing • Hong Kong • To k y o

www.extron.com

© 2021 Extr on. All ri ghts res erved . All trad emarks m ention ed are the p roper ty of their respe ctive own ers. Pri ces and s pecic ations subject to c hange wi thout no tice.

01-2021
68-3624-01
REV. A
Letter - English - NP