Dayton Audio ND64-4 Full-range Woofer

The Dayton Audio ND64-4 is a compact 2.5-inch full-range driver that delivers remarkably clear and detailed sound across the entire frequency spectrum, making it an exceptional choice for space-constrained audio projects. Its aluminium-magnesium cone provides excellent rigidity and low mass, ensuring accurate transient response and reduced distortion even at higher volumes. This driver is ideally suited for portable Bluetooth speakers, desktop monitors, soundbars, or any application where high-quality audio is required from a small footprint. The neodymium magnet assembly contributes to its lightweight design while maintaining strong motor force, and the 4-ohm impedance allows for efficient power handling in battery-powered or low-voltage systems.

Technically, the ND64-4 features a total Q factor (Qts) of 0.33, indicating a well-damped response suitable for sealed or small vented enclosures. With a maximum linear excursion (Xmax) of 1.9 mm and a sensitivity of 85.2 dB (1m/2.83V), it offers a balanced blend of output and control. The voice coil is wound with copper-clad aluminium wire (CCA) for efficient thermal management, and the 4.36 mechanical Q (Qms) combined with a 0.36 electrical Q (Qes) ensures smooth frequency extension. The driver’s 64 mm diameter and 39.1 mm depth allow for easy integration into tight spaces, while the 53.1 mm cutout diameter and four mounting holes simplify installation. Whether for a custom portable speaker or a refined desktop system, the ND64-4 provides full-range performance that belies its compact size.