The white AF218-sw Subwoofer Array Frame from QSC is a heavy-duty array frame constructed of welded 6061-T6 aluminum to suspend your WL218-sw subwoofer. The frame is comprised of ground stacking bumpers, a center support bar, shackle holes (accept 3/4" (20 mm) screw pin anchor shackle), a rigging plate, receiver blocks retaining bolts, and link assembly with ball lock pin.
The AF218-sw array frame supports flown array applications and can be inverted for ground stack applications. The enclosures can also be ground stacked without a frame using the stacking feet and recesses integral to the enclosure's design. The AF218-sw array frame can be used for ground stacking up to four WL218-sw enclosures. There is no recommended procedure other than the requirement that all articulated joints, links, and ball lock pins be in their normal position (as if suspended) and be fully inserted and locked into position.