Brand NEW! Dayton Audio PA Series Pro Woofers are a great upgrade for musical instrument or sound reinforcement cabinets, and also excel in custom-built speaker systems. Highlights Strong, low-mass carbon fiber impregnated paper cone I-beam rolled edge 1.2 mm steel frame Low distortion motor system w/copper cap Powerful 50 oz. ceramic ferrite magnet Vented pole piece/vented voice coil gap improve thermal management Black motor parts and black polyimide voice coil former dissipate heat Bumped back plate for unrestricted excursion Product Specifications Nominal Diameter - 10" Power Handling (RMS) - 300 Watts Power Handling (max) - 600 Watts Impedance - 8 ohms Frequency Response - 46 to 3,500 Hz Sensitivity - 92.6 dB 2.83V/1m Voice Coil Diameter - 2" Magnet Weight - 50 oz. Thiele-Small Parameters Resonant Frequency (Fs - )50.5 Hz DC Resistance (Re - )5.5 ohms Voice Coil Inductance (Le) - 1.49 mH Mechanical Q (Qms) - 8.49 Electromagnetic Q (Qes) - 0.66 Total Q (Qts) - 0.61 Compliance Equivalent Volume (Vas) - 1.455 ft. Mechanical Compliance of Suspension (Cms) - 0.24 mm/N BL Product (BL) - 10.6 Tm Diaphragm Mass Inc. Airload (Mms) - 42.3g Maximum Linear Excursion (Xmax) - 5 mm Surface Area of Cone (Sd) - 346.4 cm Materials of Construction Cone Material - Paper / Carbon Fiber Surround Material - Cloth Voice Coil Wire Material - Copper Voice Coil Former - Kapton / Polyimide Basket / Frame Material - Steel Magnet Material - Ferrite Mounting Information Overall Outside Diameter - 10" Baffle Cutout Diameter - 9.13" Depth - 4.92" Bolt Circle Diameter - 9.646" # Mounting Holes - 8 - All international buyers are responsible for all tax, duties and/or customs fees.