Re: Ported fiberglass box.....
but the port adds displacent, it is not a dimmensionless object, therefor ur box volume will decrease causing a diferent port tuning. But you could put a rather long tube in it, and then figure out the displacement and then see what it is tuned to, if its ti low cut a little off and figure again. And to seal the tube to the box perhaps Silicon would work
Car: 1999 Plymouth Neon
Head Unit: Alpine CDA-9853
Components: RE RE comps in some custom kick panels.
Subs: 1x Alpine Type R 1242D In a vented 33 hz 3cuft box. (redesiging)
Sub Amp: 1x Alpine MRD-M301 mono amp (400 rms/14.4volts @ 2ohms)
Speaker Amp: Infinity 7520a (97 rms x2 /14.4volts @ 4 ohms)