well i mean the spec sheet says high pass ("subsonic") filters must be used with non-sealed applications to prevent over over-excursion at frequencies below port tuning. i am going ported and the recommended tuning frequency is 38.

so any suggestions on the filter??

blue 95 se MTX alpine 9805 2 diamond 12" cm3's tuned to 38 hz 4 pioneer 3-ways(POS) jbl bp1200.1 pimpin hoes, like the river flows..... constantly!