Dayton Audio RSS265HF-4 10" Reference HF Subwoofer 4 Ohm As with the rest of the Reference Series, the main focus of the Dayton Audio RSS265HF 10" subwoofer is ultra-low distortion. Second, third, and intermodulation distortion are kept extremely low by utilizing three short-circuit paths within the motor structure. A durable aramid fiber spider and extensive venting throughout provide quiet and uniform excursion. The black anodized cone, thick rubber surround, and custom basket give this Dayton Audio driver a unique, high-end look. Choose the High Fidelity (HF) version for home systems when you are looking for clean, low bass and are not restricted by speaker cabinet size.