Ground Zero GZUW 10SQ-D2 10″ sound quality subwoofer

450 Watts RMS 10″ sound quality subwooferwith aluminum cast basket ans pressed paper cone 10″ sound quality subwoofer Klippel® optimized Scooped and pressed paper cone U-shape foam surround Solid aluminum cast basket 50 mm / 2″ copper voice coil Audiophile Polycot spider Coated paper dust cap Model High-Quality SQ subwoofer Diameter 25 cm / 10" Power Handling (RMS) 450 Watts Impedance 2x 2 Ohms Efficiency 86 dB Power Recommendation 300 – 600 Watts Voice Coil 50 mm / 2" copper Membran Layout Scooped paper Max. Excursion (Xmax) 20 mm / 0.79" Mounting Ø 236 mm / 9.29" Mounting Depth 148 mm / 5.83" Resonance Frequency (Fs) 40.2 Hz Equiv. Air Volume (Vas) 21.8 L / 0.77 cu.ft.