If youre a real car audio fanatic, a sub enclosure with just a hole or two isnt 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 6.5 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 cars interior. The holes are a half an inch bigger than the tweeters and subs, so they fit snugly. This enclosure also features a speakon terminal.