does anyone know the minimum port area or how to find it for an xxx12? I'm looking to go ~2.1cuft at 28hz.
i'd say at least 6in pvc or an equivelent square port...to keep port noise down.
those subs displace ALOT of air, if you use a small port (ex: 3 in) then the air velocity at the port will be very high...this translates into port noise (that little huffing or whistling sound we all JUST LOVE )
Would changing the box size of a ported box change how the sub will sound? 2.1cuft is what RE recomends for SQ and that is what I was looking for. The best combo that I have found would be 2.5"x17.75" that gives me a length of 51.25" but that is still way too long.