Dayton Audio RS75-4 3" Full-Range Driver

The Dayton Audio RS75-4 3" Reference Full-Range Driver represents a remarkable achievement in compact audio engineering, delivering exceptional clarity and detail from a surprisingly small footprint. This 4-ohm driver is ideally suited for a wide range of applications where space is at a premium but sound quality cannot be compromised. It excels in high-fidelity desktop speakers, near-field monitoring systems, and custom multi-channel installations, and is equally adept as a dedicated midrange driver in two-way designs or as a full-range solution in portable Bluetooth speakers and soundbars. Its precise, articulate response makes it a favourite among DIY enthusiasts and professional designers alike.

Technically, the RS75-4 is built around a rigid aluminium cone and a copper voice coil, ensuring both low moving mass for transient speed and excellent thermal management for sustained performance. The driver achieves a total Q factor (Qts) of 0.83, indicating a well-damped alignment suitable for sealed enclosures, while its mechanical Q (Qms) of 5.76 and electromagnetic Q (Qes) of 0.97 contribute to a natural, uncoloured midrange. With a maximum linear excursion (Xmax) of 1.1 mm and a displacement volume (Vd) of 1.31, it produces surprisingly robust output for its 3-inch nominal diameter. The sensitivity of 85.2 dB SPL at 2.83V ensures efficient use of amplifier power, and the 0.72 mH voice coil inductance helps maintain smooth high-frequency extension. This driver is a superb choice for anyone seeking reference-grade performance in a compact, versatile package.