Dayton Audio ND65-4 2-1/2" Aluminum Cone Full-Range Neo Driver 4 Ohm Dayton Audio's compact ND65-4 aluminum cone driver demonstrates the latest advances in high-excursion design processes. An efficient, low-distortion Neo-Balanced motor is combined with a rigid yet lightweight aluminum diaphragm, yielding impressive high-impact audio reproduction. Perfect for single point-source speaker applications, or combined in multiples and line arrays. Highlights Rubber-edged aluminum alloy cone Large excursion capability Self-shielded Neo-Balanced motor structure 4-layer underhung voice coil with polyimide former High power handling