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Silver Member Username: TylerslivaSt.Ignace, Mi U.S. Post Number: 204 Registered: Oct-08 | ok guys im gonna get get 12" alpine type r subwoofers... im gonna make the box myself can someone make me a blue print.... also idk if im gona have the subs face up or not... will that have anything to do with where the port goes?? ill prolly just face them toward my back seat... but if you could it would help alot if i have a basic blue print or a pic with some dimensions.... im using the back of my 98 silverado to put the box |
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Silver Member Username: TylerslivaSt.Ignace, Mi U.S. Post Number: 205 Registered: Oct-08 | also if you don't want to make me a blueprint could u tell me a program that will make boxes that will tell my cubic feet and port specs and all that? |
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Platinum Member Username: InsearchofbassPost Number: 11315 Registered: Jun-04 | http://reaudio.com/speaker_box/LPort_Box_Calc.html |
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Silver Member Username: TylerslivaSt.Ignace, Mi U.S. Post Number: 208 Registered: Oct-08 | can someone go to the link above and type in these dimensions and tell me if the box will be good for 2 type r's width: 30" Height: 16" top & Bottom depth: 19" wood thickness: .75" square port width: 3.25" square port length 2: 9" |
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Gold Member Username: Hittin1TEAM REVOLUTIONLake Charles... Post Number: 2525 Registered: May-07 | do it yourself and post results.. That is how YOU learn. |
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Silver Member Username: TylerslivaSt.Ignace, Mi U.S. Post Number: 209 Registered: Oct-08 | results of what? |
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Silver Member Username: TylerslivaSt.Ignace, Mi U.S. Post Number: 210 Registered: Oct-08 | i did put in thoes demensions its just idk if that box will be perfect for thoes subs |
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Bronze Member Username: CaraudioislikecrackPost Number: 22 Registered: Nov-08 | look at rovins review of the single type r he has a part where he talks about tuning and how many ft3 it is in n how it sounds. |
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Platinum Member Username: InsearchofbassPost Number: 11316 Registered: Jun-04 | So you know how much port you need. You calculate a round ports area by multiplying half the width and half the height by 3.14 ex. one 4 inch port would be 2x2x3.14=12.56 square inches of port. Then you add up the area of all your ports and from that you know how to make a slot port. Dont forget to figure in the amount of space each port takes up. ex. length times width times height times 3.14 divided by 1728. Use linearteams vent mach as your guide to how much port you need. From my exp. dont let it go higher than .10 vent mach. http://www.linearteam.dk/default.aspx?pageid=ventcalculator |
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Silver Member Username: TylerslivaSt.Ignace, Mi U.S. Post Number: 211 Registered: Oct-08 | sean u comfused me lol |
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Platinum Member Username: InsearchofbassPost Number: 11317 Registered: Jun-04 | I cant put it much simpler. As far as cubic feet your box will be you multiply length times width times depth divided by 1728. ex. width: 30" Height: 16" top & Bottom depth: 19" external but you would take off 1.5 inches of each of those measurements since you want internal measurements minus the .75 mdf times two. so 28.5 wide 14.5 high 17.5= 7231.875 divided by 1728= 4.1851 cf. |