Two new and ultimately insane ideas:
1: Drill a good 2 3/4" hole in the back of a standard sealed enclosure, glue a threaded PVC pipe end on it. Bingo! Instant ported box, and if you don't like it, screw a cap on the PVC end. Use a cut funnel for that professional touch.
(OMG that is so redneck...)
2. Use 1/2" cube wood blocks to space the speaker from the box. Again, instant cheap reversable airflow!
(I did this on a pair of roadmaster 6.5s, WOW, they hit at least 50% harder...)
1: Drill a good 2 3/4" hole in the back of a standard sealed enclosure, glue a threaded PVC pipe end on it. Bingo! Instant ported box, and if you don't like it, screw a cap on the PVC end. Use a cut funnel for that professional touch.
(OMG that is so redneck...)
2. Use 1/2" cube wood blocks to space the speaker from the box. Again, instant cheap reversable airflow!
(I did this on a pair of roadmaster 6.5s, WOW, they hit at least 50% harder...)