I was bored because my wife was making a pie so I decided to make some true "bookshelf" speakers. These are meant to be put in a bookshelf with books and such. As such I figured I could forgo a BSC circuit if I could keep the face of the enclosure flush with the books in the bookshelf. Lying around the house I had some MDF, some 6" PVC and two
Tang Band W3-593's (that were on sale for a whopping $8.88).
So, after fiddling with Unibox a bit I came up with a decent response for a vented enclosure. I didn't want to build a port so I sized it so that the depth of the port would be 3/4" - the same thickness as the MDF. This way I would only have to drill a hole (or holes as it turned out). I didn't feel like using my circle jig to drill a 1 1/8 inch hole, so I drilled four 1/2" holes instead (with a power drill).
I didn't have any binding posts so I just ran a wire through one of the ports and hooked up the two speakers. Considering my wife isn't even done baking her pie I'm very impressed. The highs are very clear and the soundstage is pretty big. Vocals sound great and are super-clear. There is a bit of a rise way up (the FR says 8kHz up) and output only goes to about 100Hz. I'm surprised at the articulation of these $8 drivers. I've been doing an A/B switch between these and a hand-me-down Bose Acoustimass system I also have hooked up to this reciever (MSRP $400 - I use it when I'm playing video games). The Bose has more bass (bloated "bass module bass" but bass nonetheless), but nowhere near the clarity from mid-bass up. I think for everything except death metal I prefer the $20 set though.
I've included a FR - please note this is on a driver that has not yet been broken in. Also, one of the four ports is covered by the wire (I have no binding posts lying around). I'll update as I play with these.