The Dayton Reference Series subwoofers take the quality and performance of the much acclaimed RS line into the subwoofer realm. As with the rest of the Reference Series, the main focus of these subwoofers 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 driver a unique, high-end look. Choose the high fidelity version for home systems when you are looking for clean, low bass and are not restricted by cabinet size. Specifications: *Power handling: 500 watts RMS/800 watts max *VCdia: 2-1/2" *Le: 1.00 mH *Impedance: 4 ohms *Re: 3.3 ohms *Frequency range: 18 - 800 Hz *Fs: 18 Hz *Magnet weight: 150 oz. *SPL: 90 dB 2.83 V/1m *Vas: 9.55 cu. ft. *Qms: 3.10 *Qes: .49 *Qts: .42 *Xmax: 14mm *Dimensions: A: 15-5/16", B: 14-1/8", C: 6-1/8".