Can Some one calculate tuning of this with one Nightshade 18? - Car Audio Classifieds!
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  #1  
Old 03-08-2009, 03:35 PM
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Default Can Some one calculate tuning of this with one Nightshade 18?

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
















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Old 03-08-2009, 04:58 PM
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it should be the same if anything it might be 1or 2hz higher because of the extra volume taken up by the subwoofer
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Old 03-08-2009, 05:04 PM
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You think? When Fallen calculated it for 2 15" shades it was like at least 3hz lower. I guess due to the qes and fs of the shades. I cant get a hold of him now though
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Old 03-08-2009, 05:10 PM
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well I guys it might be tuned lower over all I don't know how to do that that well I was just talking about the box specifically
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Old 03-08-2009, 05:15 PM
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yeah its like I know how to do it box wise I guess but not to the drivers specifications. Like just to find the port area total. Then find the port area with one blocked is just subtracting one of the sections .......
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Old 03-08-2009, 07:18 PM
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If everything's accurate on that enclosure, your specs come to:

7.889879 cubes net(I used .25 as the sub's displacement wasnt sure on the exact #)
40.81Hz tuning
180 sq inches of port area
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Old 03-09-2009, 08:30 AM
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What about with one port blocked? I am going to guess around 35hz?
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as it is you would have been better off with a 50cc hot pink moped with slutty on the plate
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im sry bro but actions like this bring down you and the whole site....this is a place to help and or learn car audio along with selling used car audio equipment.....posting to get a rise out of ppl is not only childish it hurts caco on the whole.....
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Old 03-09-2009, 05:32 PM
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just let me know if you need anymore help my good man
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Old 03-09-2009, 05:56 PM
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Undadog figured it ALL out for me via PM thanks for the help guys
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as it is you would have been better off with a 50cc hot pink moped with slutty on the plate
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im sry bro but actions like this bring down you and the whole site....this is a place to help and or learn car audio along with selling used car audio equipment.....posting to get a rise out of ppl is not only childish it hurts caco on the whole.....
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Old 03-09-2009, 06:40 PM
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Looks like there's no need to fear on this one
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'Horn'-wall: 12.75 cubes net, ~25Hz tuning, 200 sq inches of port area (lowz..?)

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