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Silver Member Username: Terry6405Sullivan, IN US Post Number: 235 Registered: Sep-05 | ok, i build my box totally guessing on the tunning. its a dual 12 hatchback divided in the middle with independent ports. it is 34" wide 16" high 16" deep on top 20" deep on bottom and the ports are (inside measurements) 1.5" wide 14.5" tall (highth of the box minus the top and bottom) and the port is 3" from the back of the box (so 13" on top and 17" on the bottom) all 3/4 MDF it doesnt sound box with my vmaxes but i just want to know with its tuned to any idea? |
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Silver Member Username: Terry6405Sullivan, IN US Post Number: 236 Registered: Sep-05 | bump |
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Gold Member Username: SouthernrebelMonroe, Louisiana USA Post Number: 2087 Registered: Mar-04 | how long is the center line of your port? (port lenght?) |
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Silver Member Username: Terry6405Sullivan, IN US Post Number: 243 Registered: Sep-05 | i belive around 15" |
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Gold Member Username: SouthernrebelMonroe, Louisiana USA Post Number: 2088 Registered: Mar-04 | if you port is 15" long...that box is tuned to roughly 43hz. per chamber you have: 21.75 sq inches of port 1.75cuft (net) air space tuned to ~43hz (if the port is 15" long) |
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Silver Member Username: Nocc1nUS Post Number: 182 Registered: May-05 | how do you figure that out, i wanna know hwo to figure out that stuff so i can make my own box |
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Silver Member Username: Terry6405Sullivan, IN US Post Number: 254 Registered: Sep-05 | that souns about right because the memphis box i modeled it after is 42, but yea how did you fiure that up for future boxes |
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Bronze Member Username: Goose5714Post Number: 41 Registered: Feb-06 | the12volt.com has a lot of converors that might help with that (i personally don't know how he came up with that) |
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Gold Member Username: SouthernrebelMonroe, Louisiana USA Post Number: 2090 Registered: Mar-04 | here is an only box calculator: http://www.bcae1.com/spboxnew2.htm scroll down about 1/4 of the way to the ported box calculator. better yet, download WinISD: http://www.linearteam.dk/default.aspx?pageid=winisdpro |
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Silver Member Username: Nocc1nUS Post Number: 183 Registered: May-05 | i know how to calculate box sizes and all that, but i wanna know how to calculate slot ports and what they are tuned to |
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Bronze Member Username: Teddy21Ann Arbor, MI USA Post Number: 21 Registered: Feb-06 | go here http://www.carstereo.com/help/Articles.cfm?id=31 |