If you're a real car audio fanatic, a sub enclosure with just a hole or two isn't good enough. You need your music to really be banging. You need the Q Power Quad Subwoofer Enclosure. This enclosure features 4 holes for a pair of 10 inch mid and a pair of 3 inch tweeters. The 5/8 inch MDF construction is covered in durable black carpet that will blend in with your car's interior. The holes are 10 and 3.5 inches big (for the speakers and tweeters respectively) so they fit snugly. This enclosure also features a speakon terminal and speakon cable.