For those of you who are simply looking for the most boom for the buck, MTX has built the S65 square series of subwoofers. Because a square shape has a greater surface area than a round shape in the same footprint, the S65 series of woofers move more air, and we all know what that translates into. Designed for bass enthusiasts everywhere, the S6512-44 is a dual four-ohm voice coil twelveinch woofer and has a retail price of $349.95 here in the U.S. Xmax.Xmax For the propeller heads out there, here is a very brief description of the patent:
“This invention provides a square speaker with a square surround with a rounded corner having an arcuate portion having a radially inner portion having an arcuate transverse cross-section, a radially outer portion having an arcuate transverse cross-section, an apex defining a boundary there between, and circumferential undulations only on the outer portion.” (arcuate means “curved”)
So we have a woofer that has a larger than normal cone area, and more Xmax, but they didn't stop there. All that cone area and excursion is useless if the woofer won't handle power, so MTX also builds the S65s with a special spider venting plateau that forces cool air over the voice coil. To further enhance the woofers thermal ability, a radially ribbed T-yoke also aids in heat dissipation, and can also lower distortion.
With great excursion comes the need for great suspension, and to 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.