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Discussion Starter #1
This is my first diy ported box build project for my alpine swr12d4 subwoofer.

I built sealed box for the same subwoofer last year, and it sounds fine or I am not even sure how good it sounds to be honest.

Anyway, now I am planning to build a ported box, with all the technical things detailed out first. So, I kind of modeled my sub in Winisd program. but not really sure what the graphs are really telling me.

So, can you please tell me whether the new ported box plan looks about right?
I want it to be louder.

yellow line: sealed box I built last year
green line: ported box plan

thank you
winisd spl.jpg

winisd phase plot.jpg

winisd group delay.jpg

winisd gain.jpg
 
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