QSC WL218-SW Spec Sheet
QSC WL218-sw is a high-performance subwoofer designed for use in demanding touring or installed concert applications. It features dual 18" woofers with 4" voice coils and a vented enclosure for powerful and accurate low-frequency output. The WL218-sw can be suspended or ground stacked and includes a simple, convenient suspension system based on the proven QSC WideLine design. With an impressive combination of punch, low-frequency extension, and accuracy, the WL218-sw is an ideal companion for QSC's acclaimed WideLine as well as other professional sound reinforcement systems.
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WL218-sw
WideLine™ Subwoofer
Features
• Simple, convenient suspension system based on the
proven QSC WideLine design. Supports up to 8 WL218-sw
subwoofers with 10:1 design factor
• Very high acoustic output capability – 139 dB SPL
(1m) peak
• Ample “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", 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
The WL218-sw is a premium, high-performance, dual 18" subwoofer designed for suspended or ground stacked use in the most demanding touring or installed concert applications.
With an impressive combination of punch, low-frequency extension and accuracy, the
WL218-sw is an ideal companion for QSC’s acclaimed WideLine as well as other professional sound reinforcement systems.
Sound system designers and operators are increasingly turning to subwoofer systems that are flown with the main array for a more seamless acoustical transition from the bass to the low-mid region. With a simple, three-point suspension design that is essentially a scaled up version of the QSC WideLine system, the
WL218-sw fulfills the requirement while also delivering powerful and stunningly accurate low frequency output.
Suspension of the array requires one AF218-sw for each subwoofer array. The AF218-sw is a simple, heavy-duty array frame constructed of welded, aviation-grade 6061-T6 aluminum and intended for suspension of up to eight
WL218-sw subwoofers with a 10:1 design factor. For ground-supported applications, the subwoofers may be stacked using the interlocking feet and recess features machined into the enclosure’s end caps.
The 18" woofers incorporate a double layer spider and triple roll surround for extended and controlled excursion at extreme power.
The 4" voice coil is wound on a fiberglass 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.
The extremely musical yet powerful performance of the subwoofer is the result of carefully balancing the transducer selection, cabinet volume and port tuning. The resulting system offers plenty of “punch” while maintaining ample extension so the musically important and satisfying fundamentals are solidly and accurately reproduced.
The enclosure of the WL218-sw is constructed of premium quality birch plywood finished in an environmentally friendly, waterborne, polymer finish that stands up to life on the road while also being field repairable. Extensive internal bracing is employed to eliminate acoustic losses due to panel resonance. Further contributions to cabinet rigidity come from vent walls constructed of the same plywood as the enclosure. Each woofer is protected by a heavyduty, 14 gauge, powder coated steel grille and housed in its own, separate chamber to prevent failure of one driver from causing damage to the other.
Despite the extremely large amount of air moving in the ports, careful attention to detail has resulted in a system that is free of port distortion “chuffing”. Ample port area allows massive amounts of air to move freely with minimal turbulence and the ports are arranged so as to eliminate asymmetrical loading of the woofers, which can result in distortion and voice coil failure related to rocking-modes.
Transport and handling were also given high priority. No matter how the box is deployed one of the dozen handles will be where it needs to be. The included dolly has rugged,
3.5", ball bearing casters and an elegantly easyto-use, snap on mechanism for attachment to the enclosure.
QSControl.net™ / BASIS™ DSP files are available for download. They are tuned for use with WL218-sw to provide optimized performance.
WL218-sw
Dimensions | Specifications
Top
45.9"
1166 mm
34.75"
882 mm
21.3"
541 mm
Front
Configuration
Low-frequency Transducer
Frequency Response (±3 dB) 1
Frequency Range (-10 dB) 1
Nominal Impedance
Continuous Power Capacity 2 / Recommended Power
Sensitivity (1 W at 1 m) 1
Maximum Output – Continuous / Peak (SPL at 1 m)
Cabinet Type
Enclosure Material
Grille
Connectors
Pin Outs
Attachment Points
Weight (Net / Shipping)
Dimensions (HWD)
Accessories Available
1) Half-space conditions
2) 2 Hrs, AES1984-2, 40 – 400 Hz, tested as system
Specifications subject to change without notice.
2 x 18" vented subwoofer
2 x 850 W, 8Ω 18" woofer with a 4" voice coil, ceramic magnet assembly
37 Hz – 200 Hz (without processing)
31 Hz – 1 k (without processing)
4Ω
1700 W / 3000 W
101 dB
133 dB / 139 dB
Vented, trapezoidal enclosure
Baltic birch plywood / 36 mm baffle and side panels; 15 mm top and bottom
14 gauge powder coated steel
2 x NL4 in parallel
Pins
1+/1- Sub
2+/2- NC
Integral, adjustable rigging system, vertical splay adjustable in 1° increments from 0° – 10°
204 lb (92.5 kg) / 244 lb (110 kg) – includes dolly
21.3" x 45.9" x 34.75" (541 mm x 1166 mm x 882 mm)
AF218-sw Array Frame (optional)
COVER WL218-sw Soft Cover (optional)
QSC, the QSC logo, QSControl.net and BASIS are registered trademarks of QSC Audio Products, LLC in the U.S. Patent and Trademark office and other countries.
All other trademarks are the property of their respective owners. Patents may apply or be pending.
1675 MacArthur Boulevard • Costa Mesa, CA 92626 • Ph: 800/854-4079 or 714/957-7100 • Fax: 714/754-6174
WL218sw Spec Sheet – 06/19/08
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