Dayton Audio UM8-22 8" Ultimax DVC Subwoofer

The Dayton Audio Ultimax UM8-22 Subwoofer is a remarkable driver that brings deep, accurate low-frequency extension to even the most compact systems. Designed for audiophiles and home theatre enthusiasts alike, this 8-inch subwoofer excels in sealed enclosures, where its high-excursion capabilities produce controlled, distortion-free bass that belies its modest dimensions. Whether you are building a discreet subwoofer for a stereo setup or integrating multiple units into a high-performance home cinema, the UM8-22 delivers a clean, articulate low end that enhances any listening experience.

At the heart of this subwoofer lies a Nomex cone, chosen for its exceptional rigidity and damping properties, which ensures precise cone behaviour even under extreme dynamic demands. With a massive 16mm linear excursion (Xmax), the driver moves significant air volume—evidenced by its displacement figure of 359.1—while maintaining low distortion. The robust motor system, featuring a copper voice coil and a 4.2-ohm DC resistance, achieves a sensitivity of 84.2 dB and a total Q (Qts) of 0.64, making it ideally suited for sealed cabinet designs. The subwoofer’s mechanical and electromagnetic parameters (Qms 2.47, Qes 0.87) further contribute to its tight, controlled response. Built with a 203.2mm nominal diameter and an 8-hole mounting pattern, the UM8-22 is engineered for straightforward installation and long-term reliability, delivering bass that is both powerful and precise.