Ground Zero GZHW 38XSPL D1 YELLOW Dual 1 ohm - 15 inch SubwooferGround Zero GZHW 38XSPL D1 is a 15 inch high quality SPL subwoofer with an aluminum cast basket and reinforced paper cone. It has an impedance of 2x1 Ohm and a power recommendation of 1500 3500 Watts. Key Features of Ground Zero GZHW 38XSPL D1 15 high quality SPL subwoofer Klippel optimized Reinforced paper cone Long stroke compound surround Solid aluminum cast basket 75 mm 3 copper voice coil 2 layer Polycot spider IMPP dust cap with 3D structure