M-SERIES EVO HIGH EFFICIENCY 30 l bass reflex enclosures with M10 EVO2 with CARBON front design very strong housing made of MDF and 33 mm double front panel 400/300 watts. Impedance: 4 Ohm. Length=550mm Height=360mm Depth1=200mm Depth2=320mm Suitable for: 10 Inch Subwoofer box passive