Simple question about round ports, first dumb post in 3 years lol

[Jeepjones85 10+ year member]

Its been about 3 years since my last build of 4 15in DC's lol I got married and stuff.

Anyway, im getting ready to build a box soon and i think this time I'm

Going with round ports and i was using the round port calculator from

The12v.com and my simple question is if i want two round 4in ports

do i just double that into the calculator and say 8in round and then the length

It gives me divide it by two ? Right.

I know that sounds like a stupid question, but its been awhile.

Also what's a good hz to tune the ports to for a daily driver needing

good lows ? I for got that too :/

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[UnderFire 10+ year member]

Download Torres' Box Tuning Calculator, it gives an option for multiple round ports.

Torres' Box Tuning Calculator - Updated 8/18 - Subwoofers / Enclosures - SMD Forum

 

[Jeepjones85 10+ year member]

O cool thanks I'll look into that!