External port

[3rdGen V8 10+ year member]

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

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[ruckus]

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.