Just finished an 3 ft^3 AV12/Rythmik sub for a friend. Built from 1" MDF w/ 3 x 3" x 11.5" flared PE ports (multiple tunings). The finish is PE Black Oak Vinyl. It looks a little funny in the pictures, but that's just finger prints and smudges on spray on furniture polish. If sounds great. I like it for music w/ 2 ports open, F3 around 25hz, and a nearly a 4 db boost @ 35hz. For HT I like it w/ 1 port open, F3 around 21hz, and flat response. My friend likes it w/ 3 ports open, F3 around 30hz, and a almost 7db booste at 40hz, for both HT and Music... to each his own I guess. The 3rd port (not shown) is bottom firring. It'll actually be on one side until we get the big spike feet from PE. Only problem so far is some port noise, even w/ all 3 ports open, at loud volumes. It's not audible from the listening position, but is within 4 or 5 feet of the sub. I figured w/ 3 3" flarred ports this wouldn't be a problem... any idea why (other than just moving alot of air)?