R-SERIES EVO 2 SUBFRAME Round closed box 14 liters with R 10 FLAT EVO 3-D4 Hole cutout for 2nd R 10 FLAT EVO 3-D4 available Very strong MDF housing and internal supports 400/300 watt Impedance: 2 Ohm Width = 580 mm Height = 135 mm Suitable for: 10 Inch Subwoofer box passive