Brand NEW! Including 90 Days USA Factory Warranty. Dayton Audio's Designer Series DS215-8 8" woofer combines smooth response, excellent bass performance, and a stylish visual presentation. Key Features Cosmetic frame with low profile lip, designed for front mounting?no countersinking required! Coated paper cone, half roll rubber surround for durability and accurate reproduction Optimized to yield a low 3 dB down point and high potential output in a reasonably sized cabinet Smooth frequency response and linear roll-off simplify filter design, guaranteeing good results with off-the-shelf crossovers Vented pole piece for minimized power compression and maximized reliability Generous Xmax capability encourages use of moderate bass boost to tailor the response Retains the same "family look" as the popular Dayton Audio DVC Series subwoofers and passive radiators The Designer Series by Dayton Audio was developed specifically with the speaker designer in mind. It is an affordable, attractive line of drivers that puts performance first. Careful engineering ensures that each speaker in the series is capable of handling full rated power at the lowest possible frequencies?without exceeding Xmax. These speakers combine useful performance parameters with elegant style. Carefully optimized to provide superb audio reproduction when incorporated into a wide variety of enclosures and alignments, the Designer Series transducers put a beautiful face on audiophile excellence. Specifications Nominal Diameter 8" Bolt Circle Diameter 8.11 Moving Mass Of Diaphragm (Mmd) 29.7 Power Handling (RMS) 80 Watts Power Handling (MAX) 160 Watts Impedance 8? Frequency Response 35 to 4,000Hz Sensitivity 89.9dB 2.83V/1m Voice Coil Diameter 1.52" Thiele-Small Parameters Resonant Frequency (Fs) 34.3Hz DC Resistance (Re) 5.8? Voice Coil Inductance (Le) 1.25mH Mechanical Q (Qms) 1.75 Electromagnetic Q (Qes) 0.38 Total Q (Qts) 0.31 Compliance Equivalent Volume (Vas) 1.52ft Mechanical Compliance of Suspension (Cms) 0.72mm/N BL Product (BL) 9.89T·m Maximum Linear Excursion (Xmax) 5.5mm Surface Area of Cone (Sd) 211.2cm Materials of Construction Cone Material Coated Paper Surround Material Rubber Voice Coil Wire Material Copper Voice Coil Former Aluminum Basket / Frame Material Steel Magnet Material Ferrite Mounting Information Overall Outside Diameter 8.5" Baffle Cutout Diameter 7.09" Depth 3.76" # Mounting Holes 5 Optimum Cabinet Size (determined using BassBox 6 Pro High Fidelity suggestion) Sealed Volume 0.28ft Sealed F3 87Hz Vented Volume 0.6ft Vented F3 52Hz - All international buyers are responsible for all tax, duties and/or customs fees.