that end the S6512 is equipped with a progressive type spider that not only allows for lots of travel but it also lowers distortion at high power levels, keeping your bass clean and pure.
The patented surround is made from Santoprene, which can be easily molded to specific shapes. A combination of stitching and adhesive solidly connects it to the cone material.
The woofer's square polypropylene cone is vacuum formed into a parabolic shape, and it's driven by a pair of two-inch copper voice coils, wound on a black anodized aluminum former. Electrical power is delivered to the voice coils through flat tinsel leads that are integrated into the spider. Connections to the amplifier are chrome plated and spring-loaded terminals that will accept up to 10-gauge wire. Magnetic energy comes from an 88 ounce ceramic magnet, covered with a nice rubber boot. Thanks to the non-vented pole piece, the woofer can be mounted in shallower enclosures as well.