Is this enough port area?
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Gold Member Username: Tdeaton1021Near Tampa, Florida USA Post Number: 1853 Registered: Sep-04 | hey guys, im brainstorming on ideas for my box for my SI mag 15s. i was thinking 8cuft net (1 box 2 subs) interior dimensions 15x27x45 with (8) 4 inch flared ports 40inches long. tune is appx 28hz. do you think 8 4 inch ports is enough port area? thats appx 100inches of port. remember these subs move 3 inch P2P! should i try to make it 10 4 inch ports? its hard when the ports get long for round ports... i may fall back on slot or square ports but i like the flared port idea lol. the box is going to have 1.5 inch thick walls EVERYWHERE! and one brace in the middle 1.5 inches thick. and besides the port area question i have one more... how am i going to get it in my truck? lol its going to weigh probably close to 300 lbs im guessing.... thanks guys |
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Gold Member Username: Tdeaton1021Near Tampa, Florida USA Post Number: 1857 Registered: Sep-04 | bump |
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Bronze Member Username: LewassBloomfield Hills, MI USA Post Number: 71 Registered: Jan-06 | Dude I have no idea, I was actually going to ask you a box building question, haha. I got a PA Mofo-12" that I want to build a much better simple ported box for. Do you know where I can find the perfect dimensions for a box for this sub? I am pretty good with craftsmanship but I want to use a premade set of dimensions so that I know what frequency I will end up with. The manufacturer says tune the box to 40 hz, but I think 35 might be best? Also, they recommend 2.4 cu ft, and I want to go bigger if it will help the output. Thanks Trevor |
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Gold Member Username: SouthernrebelMonroe, Louisiana USA Post Number: 2189 Registered: Mar-04 | 8 4" flared ports for 2 SI Mag 15's....yea, thats more than enough. lol |
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Gold Member Username: Tdeaton1021Near Tampa, Florida USA Post Number: 1861 Registered: Sep-04 | marshal- why does this site http://www.carstereo.com/help/Articles.cfm?id=31 say you always need so much port area. i know you dont need that much at all but i was just wondering if yoiu knew about what was going on witht the site. (im tlkaing about the top part of the page. it says i need minimum 215 sqinches. i know thats not right. lol. lewass- by using one of these 2 links you can choose the size you want (2.4 cuft net) and the max dimensions you can fit in your car. then select 35hz tuning. it will designs you a box and tell you exactly how to build it. goodluck! http://www.accelerator-pedal.com/l-ported-box.htm http://www.accelerator-pedal.com/ported-box.asp |
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Silver Member Username: Terry6405Sullivan, IN US Post Number: 320 Registered: Sep-05 | does internal volume include the volume inside the port when building to specs? in other words for a SX 12, would i make the 1.9 cu ft after displacement, and then add the port? a total of like 3.5 cu ft? of just the whole boz 1.9? |
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Bronze Member Username: LewassBloomfield Hills, MI USA Post Number: 77 Registered: Jan-06 | Thanks Trevor, I'll check that out. |
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Gold Member Username: B101Queen City, NC USA Post Number: 1261 Registered: Sep-05 | Trevor thats more than enough port area. Dont worry about it!  |
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Gold Member Username: Tdeaton1021Near Tampa, Florida USA Post Number: 1872 Registered: Sep-04 | net internal volume is the volume after sub AND port displacement. thanks guys for your insite! |
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