Dual 18-inch Flying Subwoofer


  • Simple, convenient suspension system based on the proven QSC WideLine design. Supports up to eight WL218-sw subwoofers with 10:1 design factor.
  • Very high acoustic output capability—139 dB SPL (1 m) peak.
  • Exceptional "punch" combined with low-frequency extension down to 31 Hz.
  • Comprehensive transport and handling features including an easy to attach dolly and twelve thoughtfully placed handles.
  • Premium-grade, long-excursion, high-power woofers with 4-inch, fiberglass voice coils, double layer spiders and triple roll surrounds.
  • Birch ply enclosure with independent, dual chambers and extensive internal bracing for rigidity and solid, accurate reproduction.
  • Finish available in black.
Configuration 2 x 18-inch vented subwoofer
Low Frequency Transducer 2 x 850 W, 8 ohm 18-inch woofer with a 4-inch voice coil, ceramic magnet assembly
Frequency Response
(±3 dB) 1
Frequency Response
(-10 dB) 1
37 Hz to 200 Hz (without processing)

31 Hz to 1 kHz (without processing)
Nominal Impedance 4 ohms
Continuous Power Capacity 2 1700 W
Max Recommended Power 3000 W
Sensitivity (1 W at 1 m) 1 101 dB
Maximum Output (SPL at 1 m)

133 dB
139 dB
Cabinet Type Vented, trapezoidal enclosure
Material Baltic birch plywood / 36 mm baffle and side panels; 15 mm top and bottom
Finish Available in standard black finish
Grille 14 gauge powder coated steel
Connectors Two NL4
Pin Outs Pins
1+/1- Sub
2+/2- NC
Attachment Points Integral, adjustable rigging system, vertical splay adjustable in 1° increments
from 0° - 10°
Weight 204 lb / 92.5 kg net
244 lb / 110 kg shipping (includes dolly)
Dimensions (HWD) inches 21.3 x 45.9 x 34.75
Dimensions (HWD) mm 541 x 1166 x 882
Accessories Available AF218-sw Large Array Frame
CVR218 Cover

1Half-space conditions
2Two hours, AES1984-2, 40 - 400 Hz, tested as system

Specifications are subject to change without notice.