The Dayton Audio Reference Series subwoofers bring the quality and performance of the RS Series into subwoofers. As with the rest of the line, the primary goal of these subwoofers is to achieve ultra-low distortion. Second-order, third-order and intermodulation distortions are kept extremely low by the use of three shorting paths in the motor structure. A durable aramid fiber spider and extensive venting ensure a quiet, even excursion. The anodized aluminum diaphragm, rubber surround and steel frame give this speaker a unique design. This high-fidelity version offers clean, accurate bass and is ideal for integration into large speaker cabinets.