Integrate Low Frequency Extension Into Standard Ceiling Speaker Systems

The Extron SF 8CT SUB is an in-ceiling subwoofer that complements the Extron range of ceiling speakers by extending the low frequency response in music and high performance audio applications. Designed to be mounted in the ceiling structure, the plenum rated SF 8CT SUB blends in with other ceiling speakers in the system. The 8" (203 mm) low frequency driver delivers rich bass for exceptional audio quality, even from smaller systems. With low and high impedance taps and an integrated low pass filter, the SF 8CT SUB offers the flexibility to meet a wide variety of system requirements.

The SF 8CT SUB extends the low frequency range of any ceiling or program speaker system for improved impact. A subwoofer can cost effectively turn a thin sounding system into a good music playback system or a good music playback system into a great one.

Flexible Installation

For distributed systems, the SF 8CT SUB has an integrated 70/100 volt transformer, allowing placement of multiple subwoofers within a space to provide even coverage from a single amplifier. Power taps at 64, 32, 16, and 8 watts enable the SF 8CT SUB to be placed in low ceiling rooms without being overpowering, or in low SPL applications where low frequencies require additional reinforcement to acheive equal loudness across the audio spectrum.

For installations where more power is required, the SF 8CT SUB can be connected in 8 ohm direct mode, offering up to 200 watts continuous program power handling capability.

A selectable 120 Hz, 6 dB per octave low pass filter is included to simplify setup without the need for additional crossovers.

Features

Tuned Port Enclosure

Extends the low frequency range of the SF 8CT SUB for powerful bass
Low or High Impedance Operation

8 ohm direct
70 volt: 64, 32, 16, and 8 watt selectable
100 volt: 64, 32, and 16 watt selectable
Selectable 120 Hz Low Pass Filter

Included low pass filter simplifies setup
8" Low Frequency Driver

Delivers rich bass for exceptional audio quality, even from smaller systems
UL 2043 Plenum Rated

Designed to be mounted in the ceiling structure to match other ceiling speakers in the room

Frequency Range: 45 Hz to 300 Hz

Can add a full octave of powerful bass to many typical ceiling speaker systems without distortion.
Power Handling Optimized for Headroom in any System

100 watts continuous pink noise
200 watts continuous program
Side Oriented Cable/Conduit Access Plate

Integrator-friendly design allows for clearance from other structures above the ceiling
Supports Thicker Ceilings

Locking arms support ceilings up to 2.25" (57 mm) thick
Magnetically Attached Paintable Grille & Bezel

Provides a finished look to match the room with easy access to speaker controls

Application Diagram

In this classroom, the SF 8CT SUB provides sonic impact for a wide range of content. All sources are mixed and routed through a DMP 64 Plus C AT audio DSP processor and amplified by an XPA U 1004 SB with one bridged output to the subwoofer and stereo outputs to the SM 26 program speakers. System control is made easy with an ACP 100 audio control panel mounted on a wall or in a lectern.

SF 8CT SUB

SoundField 8" In‑Ceiling Subwoofer

Global Support

Get help with choosing a solution or schedule a visit to our office

View Extron Worldwide Office Locations

Subwoofer Impact for Ceiling Speaker Systems