Ground Zero GZHW 25XSPL-D2

10″ high quality SPL subwoofer with alumiunum cast basket and reinforced paper cone 10″ high quality SPL subwoofer Klippel® optimized Reinforced paper cone Long stroke compound surround Solid aluminum cast basket 63 mm / 2.5″ copper voice coil 2-layer Polycot spider IMPP dust cap with 3D structure logo Model High-Quality SPL subwoofer Diameter 25 cm / 10″ Power Handling (RMS/SPL.) 1200 / 2500 Watts Impedance 2x 2 Ohms Efficiency 83 dB Power Recommendation 800 – 2500 Watts Voice Coil 63 mm / 2.5″ Copper Membran Layout Reinforced paper Max. Excursion (Xmax) 45 mm / 1.77″ Mounting Ø 238 mm / 9.37″ Resonance Frequency (Fs) 41.8 Hz Overall Qaulity (Qts) 0.487 Equiv. Air Volume (Vas) 8.53 L / 0.30 cu.ft..