Brand NEW! Including 90 Days USA Factory Warranty. Dayton Audio's Reference Series RSS315HFA-8 12" subwoofer utilizes the same low-distortion design as the rest of the series, but provides an 8 ohm alternative for increased connection and impedance-loading options. Key Features Extensively vented motor eliminates power compression and allows quiet excursion Lighter-weight black anodized aluminum cone minimizes moving mass 2-layer coil for reduced back EMF Triple shorting-ring motor for ultra-low distortion Optimized for large enclosures Highest quality materials throughout for long-lasting performance The Dayton Audio 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 the RSS315HFA-8 12" driver is ultra-low-distortion. Second, third, and intermodulation distortion are kept extremely low by utilizing three magnetic 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 this High Fidelity (HF) version for home speaker systems when your priority is clean, low bass and you are not restricted by cabinet size. Product Specifications Nominal Diameter 12" Moving Mass Of Diaphragm (Mmd) 194 Power Handling (RMS) 400 Watts Power Handling (MAX) 700 Watts Impedance 8? Frequency Response 25 to 1,500Hz Sensitivity 85.7dB 2.83V/1m Voice Coil Diameter 2.58" Thiele-Small Parameters Resonant Frequency (Fs) 22.2Hz DC Resistance (Re) 6.5? Voice Coil Inductance (Le) 1.56mH Mechanical Q (Qms) 2.5 Electromagnetic Q (Qes) 0.54 Total Q (Qts) 0.45 Compliance Equivalent Volume (Vas) 3.43ft Mechanical Compliance of Suspension (Cms) 0.27mm/N BL Product (BL) 18T·m Maximum Linear Excursion (Xmax) 14.3mm Surface Area of Cone (Sd) 506.7cm Materials of Construction Cone Material Aluminum Surround Material Rubber Voice Coil Wire Material Copper Voice Coil Former Aluminum Basket / Frame Material Steel Magnet Material Ferrite Mounting Information Overall Outside Diameter 12.36" Baffle Cutout Diameter 11.1" Depth 5.75" # Mounting Holes 8 Optimum Cabinet Size (determined using BassBox 6 Pro High Fidelity suggestion) Sealed Volume 1.54ft Sealed F3 40Hz Vented Volume 4.63ft Vented F3 20Hz - All international buyers are responsible for all tax, duties and/or customs fees.