SEAS Prestige U18RNX/P - H1571-08 7" Curv Cone Woofer

The SEAS Prestige U18RNX/P - H1571-08 7" Curv Cone Woofer represents a pinnacle of engineering for discerning audio enthusiasts who demand accurate, natural mid-bass reproduction in their high-fidelity loudspeaker designs. This exceptional driver is ideally suited for use in two-way or three-way systems, where it excels at delivering the critical midrange frequencies with clarity and authority, while also providing a solid foundation in the lower registers. Whether you are constructing a pair of standmount monitors or a floorstanding loudspeaker, this woofer integrates seamlessly to create a cohesive and immersive soundstage.

Technically, the U18RNX/P features a 177.8 mm nominal diameter and a curvilinear cone crafted from SEAS’s proprietary Curv material, which combines low mass with high stiffness for minimal breakup and distortion. The motor system is optimised for linearity, with a total Q factor (Qts) of 0.37, a mechanical Q (Qms) of 2.05, and an electromagnetic Q (Qes) of 0.45, ensuring controlled, tight bass response. With a sensitivity of 88 dB SPL (1m/2.83V) and a maximum linear excursion (Xmax) of 6 mm, this woofer handles dynamic passages with ease. The low-loss suspension, 5.9 Ω DC resistance, and 0.25 mH voice coil inductance further contribute to its refined performance. Designed for a cut-out diameter of 145.3 mm and a mounting depth of 83.3 mm, this driver is a superb choice for serious loudspeaker projects.