Can Some one calculate tunings of this with one Nightshade 18?

[vforvengence 10+ year member]

With one port blocked and 2 ports blocked also just for curiosity. It was supposed to be for the Orion H2 15's so it would've been 43hz, 35hz and 30hz I believe but thats obsolete now anyway. So I need to know if I'll even need/want to block anyports because It'll be SOOOO big for the 18 anyhoo I think 7 cubes and some change. I added a little more bracing than is in the design but it shouldn't be enough to change the tuning significantly.

Thanks for the help

Tye

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[vforvengence 10+ year member]

I know there are some knowledgeable member here.....anyone?

 

[skmfkr 5,000+ posts]

so if the only thing changing is the sub displacement. the tuning should still be pretty much the same thing.

 

[vforvengence 10+ year member]

Really? I was thinking that due to the difference in the FS and QES that it would tune it MUCH different. When it was calculated for Nightshade 15s it was 40hz 32hz and like 27 or something waaayyyy too low for them.