Ground Zero GZIW 300

All GZIW subwoofers have a new updated voice coil, andspirally stiffened IMPP dust cap with 3D structure logo. This significantly affects the resonance of the cone, so the redesigned GZIW guarantees an even tighter kick!Don´t get fooled by the affordable price! These budget class XSPL-monsters are designed with Klippel-optimization to squeeze out every single desibel that is possible to get. Voice coil cooling is very efficient and long excursion gives you a LOT of bass. Very linear impedance curve makes it possible to really extract all the power from the amp to these subwoofers. Diameter 30 cm / 12″ Power Handling (RMS) 350 Watts Impedance 4 Ohms Efficiency 88 dB Power Recommendation 200 – 400 Watts Voice Coil 50 mm / 2″ copper Membran Layout HQPP cone with 3D structure Max. Excursion (Xmax) 28 mm / 1.10″ Mounting Ø 287 mm / 11.30″ Mounting Depth 149 mm / 5.87″ Resonance Frequency (Fs) 30 Hz Overall Qaulity (Qts) 0.58 Equiv. Air Volume (Vas) 69.3 L / 2.45 cu.ft.