Dayton Audio ND91-4 3-1/2" Aluminum Cone Full-Range Driver

The Dayton Audio ND91-4 is a 3.5-inch full-range driver that delivers remarkably clear and detailed audio from a compact footprint. Engineered for versatility, this aluminium cone driver excels in applications where space is at a premium yet sound quality cannot be compromised. It is ideally suited for use in small sealed enclosures, desktop speakers, portable Bluetooth systems, or as a high-fidelity replacement driver in existing designs. Its full-range capability means it can reproduce vocals, instruments, and ambient details with impressive accuracy, making it a superb choice for both DIY audio projects and commercial upgrades.

At the heart of the ND91-4 lies a lightweight aluminium cone and an aluminium voice coil wire, ensuring rapid response and low distortion. The driver features a total Q factor (Qts) of just 0.41, which allows for excellent performance in compact, sealed cabinets. With a maximum linear excursion (Xmax) of 4.6 mm and a sensitivity of 85.6 dB SPL at 2.83V, it offers a balanced blend of efficiency and dynamic range. The 4-ohm impedance and low DC resistance of 4.3 ohms make it easy to integrate into a wide variety of amplifier configurations. Its 85 mm cutout diameter and four mounting holes simplify installation, while the 63.4 mm depth ensures it fits neatly into shallow enclosures. Whether for a near-field monitor or a portable speaker, the ND91-4 delivers exceptional full-range sound in a small package.