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Introduction
The WL218-sw is a dual 18-inch (457mm) subwoofer designed for suspended or ground stacked use in touring or installed concert appli-
cations. With an impressive combination of sonic impact, low-frequency extension, and accuracy, the WL218-sw is an ideal companion
for QSC's WideLine as well as other professional sound reinforcement systems.
Suspension of WL218-sw subwoofers is easy using the AF218-sw, a heavy-duty array frame constructed of welded 6061-T6 aluminum. In
ground-supported applications, the WL218-sw may be stacked using the interlocking feet and recess features machined into the enclo-
sure's ends.
The woofers incorporate a double layer spider and triple roll surround for extended and controlled excursion at high power. The 4-inch
(102mm) voice coil is wound on a fibreglass former to prevent deformation at high operating temperatures and is extensively vented to
reduce power compression. An aluminum demodulating ring is employed for low distortion. Each woofer is housed in a separate chamber
to prevent failure of one driver from causing damage to the other. A 14-gauge (1.9mm) powder coated steel grill protects the drivers.
Enclosure construction features premium quality birch plywood finished in an environmentally friendly, water-borne, polymer finish that's
tough and field repairable. Extensive internal bracing and exclusive use of birch plywood minimizes acoustic loss due to panel resonance.
Ample port area allows air to move freely with minimal turbulence. The ports are arranged so as to eliminate asymmetrical loading of the
woofers, further protecting the drivers.
Transport and handling features are also provided in the WL218-sw's design. No matter how the box is deployed, one of the dozen han-
dles will be where it needs to be. The included dolly has rugged, 3.5-inch ball bearing casters and an easy-to-use, snap-on mechanism for
attachment to the enclosure.
For users of QSC's digital audio transport and processing products, QSControl.net / Basis DSP files tuned for use with WL218-sw are
available for download. Visit us at http://www.qscaudio.com for the latest products, and news.
WL218-sw Loudspeaker
1- Handles
2- Stacking recesses
3- Stacking feet
4- Receiver tubes with ball lock pins & captive articulated joints
5- Dolly board latch plates
6- Grille
7- Skids
8- Serial number plate
9- Rear link and receiver block
10- Input connector plate
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