QSC WL218-sw WideLine Portable Subwoofer (White)


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The WL218-sw WideLine Portable Subwoofer from QSC is a high-performance dual 18″ subwoofer with a black tour-grade finish.

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QSC WL218-sw WideLine Portable Subwoofer (White)

The WL218-sw WideLine Portable Subwoofer from QSC is a high-performance dual 18″ subwoofer with a white tour-grade finish. It is designed for suspended or ground stacked use in touring or installed concert applications, and can be used with the WideLine as well as other professional sound reinforcement systems. 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 vented to reduce power compression. An aluminum demodulating ring is employed for low distortion. MFR # WL218-SW-TG

The enclosure of the WL218-sw is constructed of 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 heavy duty, 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. Ample port area allows massive amounts of air to move freely, 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.

The unit features 12 handles for ease for transport and handling. The included dolly has rugged, 3.5″, ball bearing casters and an easy-to-use, snap on mechanism for attachment to the enclosure. Suspension of the array requires one AF218-sw (sold separately) 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. QSControl.net/BASIS DSP files are available for download. They are tuned for use with WL218-sw to provide optimized performance.


Simple suspension system based on the QSC WideLine design. Supports up to eight WL218-sw subwoofers with 10:1 design factor

139 dB SPL (3.3′) peak acoustic output capability

“Punch” combined with low-frequency extension down to 31 Hz

Comprehensive transport and handling features including an easy to attach dolly and twelve handles

Long-excursion, high-power woofers with 4″, fiberglass voice coils, double layer spiders and triple roll surrounds

Birch plies enclosure with independent, dual chambers and extensive internal bracing for rigidity and solid, accurate reproduction

Finish available in black (WL218-w-BK) or white (WL218-w-WH).


Configuration            2 x 18″ vented subwoofer

Low Frequency Transducer                      2 x 850 W, 8 ohm 18″ woofer with a 4″ 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)


Peak:            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           Black (WL218-sw-BK) or white (WL218-sw-WT) texture coat

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 (HxWxD)           21.3″ x 45.9″ x 34.75″  (541 mm x 1166 mm x 882 mm)

In Box       Limited 3-Year Warrantyhttp://qscservice.com/policies/warranty-statement

Accessories Available AF218-sw Array Frame (optional)

COVER WL218-sw Soft Cover (optional)

1 Half-space conditions 22 hours, AES1984-2, 40 – 400 Hz, tested as system

Specifications are subject to change without notice


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