View Full Version : External port

3rdGen V8
10-22-2005, 05:49 PM
I am building a ported fiberglass sub enclosure. It will house 2 mtx 7500s. 4cf total, 2 per chamber. since my space is limited i was wondering if i could make an external port out of pvc pipe. If so, what would the proper size pvc be and what length to tune it to 38 hz

10-22-2005, 08:35 PM
yes you can. and the length depends on the diameter of the PVC. you can do 2 x 4" pipes @ 8.6" ea not counting any flares you have on them to eliminate port noise.