how many sq inchs of port

[iowaaurora 10+ year member]

re sx 18 tuned to around 33 in 5.8 cubic feet after port and displacement

i was gonna go whith 90 but figure i would ask

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[bball09124 10+ year member]

90 will work. I'd personally go a little smaller, around 75, but that's just me.

 

[themommyvan 10+ year member]

12-16 sq in per cubic foot

 

[Mike465 10+ year member]

I had an 18" Mt that I had in a 8.75 cubic foot box with 155 square inches of port tuned to 38Hz. It beat and sounded good. The only problem you will have with a large port is losing control of the cone once it gets down lower that the tuning freq.

 

[iowaaurora 10+ year member]

i went whith 78.5 at 31h

box is all put togather got some sanding and paiting to do yet

will post work log when i get futher along

thanks for the help though

 

[Pioneer~Saturn 5,000+ posts]

i went whith 78.5 at 31h
box is all put togather got some sanding and paiting to do yet

will post work log when i get futher along

thanks for the help though

You should be happy with that