The all new 300 Series “e” revision comes to us with 10” and 12” models featuring 2.5” voice coils and 100oz magnet motors. These new drivers bring increased sensitivity, Xmax, and excursion control to deliver powerful bass from higher efficiency enclosures on 250 to 500 Watts RMS. Upgrades to this series include cones with fiberglass loaded non-pressed treated paper, taller and thicker EROM surrounds with black stitching, heavier dual layering with integrated tinsel leads, and new basket and motor boot designs elevating cosmetics with DD branding. Item dimensions: 0.0 inches Item depth width height: 0.0 inches Item weight: 16.0 pounds FEATURES: Free Flow Cooling System High-temp Voice Coil Dual Layer Spider System With Integrated Tinsel Leads Extended Pole Piece DD Logo Basket Double Stitched EROM Surrounds Fiberglass Loaded Non-Pressed Cones Embossed DDesign Magnet Boot SPECIFICATIONS: Speaker Size (In): 10 Watts RMS: 500 Watts Peak: 1500 Impedance: D2 / D4 VCD (In): 2.5 Fs (Hz): 39 Qms: 5.18 Qes: 0.688 Qts: 0.61 Vas (Liters): 11.43 BL (TM): 25 Xmech (MM): 30 Xmax (MM): 14 Frame OD (In): 11.17 Frame OD w/Gasket (In): 12.126 Mounting Diameter (In): 11.02 Mounting Depth (In): 6.53 Motor Diameter (In): 6.14 Motor Depth (In): 2.59 Magnet Weight (Oz): 100 Woofer Displacement (CuFt): 0.07 Ported Enclosure (CuFt): 1.25 - 1.5