The new unconventional motorstructure was requested by touring professionals for accurate low-frequency reproduction using a high excursion piston. The 19-inch cone size is the ideal balance between traditional high-speed 18” and the slower 21” and inherits the best characteristics of the two sizes. Employing lightweight aluminum core coils, high-damping cellulose cone material, composite spiders and a 4-layer inside-outside voice coil, the ultra-long excursion moving mass (67mm/2.6-inch safe peak-to-peak) gains high power with fast acceleration. The improved TT+ Audio’s Hypervented technology reduces power compression, heat and distortion.