View Full Version : can someone please check this tuning frequency?

07-26-2005, 08:12 PM
-1 box

-(1) 15" L7

-4.25cu ft after bracing/sub displacement,

-(4) 3" pieces of PVC(3" is outside diameter, inside dia is 2.5" I think), 12in long each.

-30hz tuning freq.

Side question... Are (4) 3" pvc ports enough to prevent port noise with 550wrms to this sub?