Power Rating: 2100 W SPL Power Woofer: 3 x 25 cm / 10“ ( GZIW 10XSPL ) Impedance: 1.4 Ohm Recommended amplifier power: 1500 – 2100 Watt @ 1Ohm Dimensions: 83 x 34 x 32 / 24 cm 32.68“ x 13.39“ x 12.6“ / 9.45“ Vol. net: 60 L / 2.12 cu.ft.