Has anyone seriously considered a slot-loaded design for the AV15? It seems to help with the tuning issues and I can't see the downside. Of course, it does not get the response flat to 20hz like PR would, but PR is not an option and I want to try this anyway. gross internal volume 7ft^3 / 198l slot on bottom and back 2" x 19" x 48" total length net volume after slot ~5.5ft^3 / 155l With 750w hits 112db at 20hz, and 116db at 30hz. To get to the slot length I took the bottom + back - 2" for the intersection (can't count this twice) - 2" for the opening in the inside of the cabinet (although I think that length would actually contribute). The overall cabinet would be 24" x 22" x 34.5" with double walls and triple front (dry curb weight just short of a honda civic). This tunes to about 18.5hz, f3 at 22.8hz, and max port speed at 750w is around 22m/s. The slot is roughly equivilant to a 7" inside diameter round port. I am also thinking it would be easy to flare the slot on the sides (just flare the short side) which would help with noise, although I think this would not be a problem for this design. Has anyone built a slot design and care to comment on the ups and downs? I must be missing something because this seems way too easy.