ported box

[iammiowngod 10+ year member]

i just went from a small sealed to a large ported and wow what a DB change. anyway i heard people talking about tuneing a ported box and from what i understand it has to do with the port size and volume and so on .also about box impedence and how it affects your overall ohm load. I have no idea what my box is tuned at or how to figure that out, is there a computer program, open sorce preferable, to do it or what formula would i use, also how do i test it

thanks

-brian

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