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I would do a double baffle for an 18, and that would eliminate some of the bracing you have in there. Also a little on the big side port wise. I've built boxes for several Q's and have always done 12^2 per cube...
steveyhustle
Banned
i would tune it to 32. 30 bit to low
helotr3vor 10+ year member
CarAudio.com Elite
Whats that design maker called? i need to make a design
BuckyBoy 10+ year member
CarAudio.com Elite
I drew it up for him. If you need one, you can PM me.
If you want to make one yourself, then there is a sticky at the top of this section. There is no program that does it. The RE Calc is used by some, but is inaccurate.
BuckyBoy 10+ year member
CarAudio.com Elite
I figured with it being an 18" Fi Q, that it would need more port area, but I don't have any experience with them.
Only 12sqin per ft^3?
He is wanting to get more net volume anyways, so we will probably change the design a bit. Smaller port, more airspace.
helotr3vor 10+ year member
CarAudio.com Elite
Well whats the program that i can draw it out?
steveyhustle
Banned
i had a 15'' FI Q in a 3.5 cubic ft box tuned to 32herts from bjfish and it sounded amazing.
90accordman 5,000+ posts
CarAudio.com Veteran
ida went closer to 90 sq in or port 111 is alot imo
BuckyBoy 10+ year member
CarAudio.com Elite
Ah, didn't know that's what you were asking.
I use Google Sketchup...
http://www.download.com/Google-SketchUp/3000-6677_4-10257337.html?tag=lst-1&cdlPid=10626008
quest51210 10+ year member
CarAudio.com Veteran
scammer!!!!
Q is more of an SQL sub vs SPL, so no need for the massive port area IMO...
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