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 8 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 7 and 3.5 inches big (for the speakers and tweeters respectively) so they fit snugly. This enclosure also features a speakon terminal.