18-inch Flyable Subwoofer

The SB-118F single 18-inch and SB-218F dual 18-inch subwoofers are designed specifically for low frequency enhancement in cinema applications, especially for low frequency content of the surround channels using bass management techniques. A common application is suspending these enclosures from the cinema ceiling in proximity to the wall mounted surround loudspeakers for which the SB-118F/218F provides low frequency enhancement. The SB-118F/218F covers the frequency range from 37 Hz to 230 Hz.

These enclosures are designed for safe and easy suspension using eight built-in M10 fly points. Heavily braced, tour grade 15 mm plywood construction provides great strength while keeping weight to a minimum. The custom 800 watt, 18-inch transducers were developed especially for cinema use. They feature large 4-inch (101 mm) voice coils and a multi-vented pole piece to ensure cool operation, even at high power levels. Cooler temperatures increase transducer lifespan and decrease the problem of power compression at high power.

The SB-218F enclosure features separate chambers for each transducer. In the rare event of a transducer failure, this prevents over-excursion of the remaining transducer caused by improper box loading. Both models feature 4 ohm impedance, which means that you can use a smaller amplifier to get maximum output from the loudspeaker.


  • High output performance with 1600 W / 6400 W continuous power rating
  • Eight built-in M10 mounting points for overhead suspension
  • 15 mm plywood construction for increased cabinet structural integrity
  • 4 ohm impedance for efficient amplifier power
  • Side mounted hand holds for easy handling during installation
  • Foam-lined perforated steel grille
  • Barrier Strip and Neutrik SpeakOn® connection
PRELIMINARY Specifications SB-218F
Configuration 2 x 18-inch, subwoofer
Frequency Response (-6 dB) 37 Hz – 230 Hz
Frequency Response (-10 dB) 32 Hz – 230 Hz
Power Capacity2: Continuous/Peak 1600 W / 6400 W
Sensitivity (1W, 1m) 101 dB
Output1 (Peak SPL @ 1m) 139 dB
Driver 2 x 457 mm (18-inch) drivers with 101 mm (4-inch) voice coils
Nominal Impedance 4 ohms
Input Connectors 2 x NL4, 1 x barrier strip
Enclosure 15 mm plywood, black texture finish. Hand holds on each side
Grille Perforated, powder-coated steel, foam-lined
Mounting Eight (8) M10 threaded mounting points
Net Weight 168 lb / 76.4 kg
Shipping Weight 183 lb / 83.2 kg
Dimensions (WxHxD) inches 46.5 x 23.2 x 25.25
Dimensions (HxWxD) mm 1180 x 595 x 640

  With QSC processing
2  Power that the device can withstand for 2 hours without permanent change in acoustical, mechanical,
    or electrical characteristics, greater than 10%, using IEC60268 noise based on nominal impedances

Specifications are subject to change without notice.