QSC WideLine WL218-sw Specification Sheet
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WL218-swWideLine™ SubwooferThe WL218-sw is a premium, high-performance,dual 18" subwoofer designed for suspended orground stacked use in the most demandingtouring or installed concert applications.With an impressive combination of punch,low-frequency extension and accuracy, theWL218-sw is an ideal companion for QSC’sacclaimed WideLine as well as other professionalsound reinforcement systems.Sound system designers and operators areincreasingly turning to subwoofer systems thatare flown with the main array for a moreseamless acoustical transition from the bass tothe low-mid region. With a simple, three-pointsuspension design that is essentially a scaledup version of the QSC WideLine system, theWL218-sw fulfills the requirement while alsodelivering powerful and stunningly accurate lowfrequency output.Suspension of the array requires one AF218-swfor each subwoofer array. The AF218-sw is asimple, heavy-duty array frame constructedof welded, aviation-grade 6061-T6 aluminumand intended for suspension of up to eightWL218-sw subwoofers with a 10:1 designfactor. For ground-supported applications,the subwoofers may be stacked using theinterlocking feet and recess features machinedinto the enclosure’s end caps.The 18" woofers incorporate a double layerspider and triple roll surround for extendedand controlled excursion at extreme power.The 4" voice coil is wound on a fiberglassformer to prevent deformation at high operatingtemperatures and is extensively vented to reducepower compression. An aluminum demodulatingring is employed for low distortion.The extremely musical yet powerful performanceof the subwoofer is the result of carefullybalancing the transducer selection, cabinetvolume and port tuning. The resulting systemoffers plenty of “punch” while maintainingample extension so the musically importantand satisfying fundamentals are solidly andaccurately reproduced.The enclosure of the WL218-sw is constructedof premium quality birch plywood finishedin an environmentally friendly, waterborne,polymer finish that stands up to life on theroad while also being field repairable. Extensiveinternal bracing is employed to eliminateacoustic losses due to panel resonance. Furthercontributions to cabinet rigidity come from ventwalls constructed of the same plywood as theenclosure. Each woofer is protected by a heavy-duty, 14 gauge, powder coated steel grille andhoused in its own, separate chamber to preventfailure of one driver from causing damage tothe other.Despite the extremely large amount of airmoving in the ports, careful attention to detailhas resulted in a system that is free of portdistortion “chuffing”. Ample port area allowsmassive amounts of air to move freely withminimal turbulence and the ports are arrangedso as to eliminate asymmetrical loading of thewoofers, which can result in distortion andvoice coil failure related to rocking-modes.Transport and handling were also given highpriority. No matter how the box is deployedone of the dozen handles will be where itneeds to be. The included dolly has rugged,3.5", ball bearing casters and an elegantly easy-to-use, snap on mechanism for attachment tothe enclosure.QSControl.net™ / BASIS™ DSP files are available fordownload. They are tuned for use with WL218-swto provide optimized performance.Features• Simple, convenient suspension system based on theproven QSC WideLine design. Supports up to 8 WL218-swsubwoofers with 10:1 design factor• Very high acoustic output capability – 139 dB SPL(1m) peak• Ample “punch” combined with low-frequency extensiondown to 31 Hz• Comprehensive transport and handling featuresincluding an easy to attach dolly and twelve thoughtfullyplaced handles• Premium-grade, long-excursion, high-power woofers with4", fiberglass voice coils, double layer spiders and tripleroll surrounds• Birch ply enclosure with independent, dual chambersand extensive internal bracing for rigidity and solid,accurate reproduction |
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