Dayton Audio’s ND64-4 is truly a full-range driver and capable of over 6 mm of peak-to-peak excursion. It features a dual neodymium magnet structure, a 3/4" CCAW voice coil, and a copper sleeve to minimize distortion. An efficient, low-distortion neodymium motor is combined with a rigid yet lightweight aluminum magnesium diaphragm, yielding impressive high-impact audio reproduction. Perfect for single point-source speaker applications, or combined in multiples in line array designs.