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Silver Member Username: 54danny54Post Number: 255 Registered: Nov-04 | how do you figure out: 1.)tuning of ports 2.) volume of boxes i need the calculatins...thanx all |
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Gold Member Username: InsearchofbassPost Number: 1969 Registered: Jun-04 | circle ports http://www.linearteam.dk/default.aspx?pageid=ventcalculator square port calculator (use the circle port as a guide for port volocity) http://www.carstereo.com/help/Articles.cfm?id=31 box volume calculator http://www.bcae1.com/spboxnew2.htm |
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Silver Member Username: 54danny54Post Number: 256 Registered: Nov-04 | thanx...but what is the calculations if i dont have the internet handy...cause ualready answered wat i needed its just wat if idont have a calculator handy........oh yea and surface area |
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Gold Member Username: InsearchofbassPost Number: 1971 Registered: Jun-04 | copied an easy answer hi. all u gotta use is pie. if u have a round port of say 4 inches diameter. u must multiply this by pie(3.14 approx). this will give you 12.56.now wat u have here is the surface area of the port. now consider 12.56 as a single length of the port. now if ur port is 1 inch wide(slotted), and the port is 12.56 in height- 12.56multiplied by 1 = 12.56.so finally if ur port is gonna be 2 inches wide all u gotta do is divide 12.56 by 2. and this gives ur dimensions. 6.28 in height and 2 inches width.u can do this forever u can divide it by 3,4,5 but remember u always have to use both numbers as the dimensions. also when makin the port u must consider the displacement of the mdf if it is a certain thickness it will take up space, and therefore reduce volume of the box. so making the box bigger is a must if u r using very thick mdf. oh yeah, if u want two ports into one, all u have to do is calculate the surface area of the port so say 4inches * 3.14= 12.56. all u do is add this to the surface area of the other port. so therefore 12.56*2=25.12. so your port will be this amount divided by whatever width you want the port to be. but remember that the port at say 25.12 inches in height will always be 1 inch wide not 0. (do the math) |
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Silver Member Username: 54danny54Post Number: 257 Registered: Nov-04 | i kinda get it |