Model SPL Subwoofer Box Diameter 30 cm / 12″ Power Handling (RMS/SPL.) 500 / 1000 Watts Impedance 2x 2 Ohms Subwoofer GZIW 12XSPL-D2 Dimensions (B x H x T1/T2) 560 x 380 x 360/260 mm / 22.05″ x 380″ x 360″/10.24″.