Dayton Audio RSS265HO-4 10" Reference HO Subwoofer 4 Ohm As with the rest of the Reference Series, the main focus of the Dayton Audio RSS265HO-4 10" subwoofer is ultra-low-distortion. Second, third, and intemodulation 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, rubber surround, and custom basket give this 10" driver a unique, high-end look. Choose the high output version for automotive applications or for equalized high-power home subwoofer speaker systems.