Versarray 218 Subwoofer

An incredible 4,800-watt program rating is made possible by
Kevlar®-impregnated cones that increase strength and minimize
distortion, as well as polymide-impregnated fiberglass formers,
die-cast
aluminum frames and 4-inch diameter edge-wound voice coils
with
solderless, diffusion-welded OFHC copper ...