custom box

[Immacomputer 10+ year member]

sorry to double post, but on the website with Minimum Usable Vent Diameter, who does Xmax mean?

It's a parameter of a speaker. It is the linear throw that a speaker has. It's not the total throw the speaker can have but where the motor force is for the most part, linear. Outside of that region, all the electrical parameters will shift as well as the mechanical parameters (if we're approaching the non-linear region of the suspension).

 

[bonesninja 5,000+ posts]

in your case....21mm

 

[Enellz 10+ year member]

It's a parameter of a speaker. It is the linear throw that a speaker has. It's not the total throw the speaker can have but where the motor force is for the most part, linear. Outside of that region, all the electrical parameters will shift as well as the mechanical parameters (if we're approaching the non-linear region of the suspension).

when I read this I feel like charlie brown, wah wah wah wah, lol. but d*mn I didnt know designing a box was this crazy....//content.invisioncic.com/y282845/emoticons/crap.gif.7f4dd41e3e9b23fbd170a1ee6f65cecc.gif

 

[Immacomputer 10+ year member]

when I read this I feel like charlie brown, wah wah wah wah, lol. but d*mn I didnt know designing a box was this crazy....//content.invisioncic.com/y282845/emoticons/crap.gif.7f4dd41e3e9b23fbd170a1ee6f65cecc.gif

It's one of many parameters that are very useful for speaker enclosure design. They are known as the Thiele Small parameters. You can read more about each of them here:

http://www.the12volt.com/caraudio/thiele.asp

 

[bonesninja 5,000+ posts]

It's one of many parameters that are very useful for speaker enclosure design. They are known as the Thiele Small parameters. You can read more about each of them here:
http://www.the12volt.com/caraudio/thiele.asp

what a noob....you're a few posts late //content.invisioncic.com/y282845/emoticons/crazy.gif.c13912c32de98515d3142759a824dae7.gif

 

[Enellz 10+ year member]

nice write up on the link, found out its 21mm....Another thing learned

edit: bonesninja you the sh*t. helping me out alot over here

 

[miker 5,000+ posts]

I pretty sure its deeper than, I rather do it myself, I mean I rather do stuff myself anyway. LEARN, Its the key to life

Learning is not at all what you think it is //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif lol I "learned" that today.... //content.invisioncic.com/y282845/emoticons/crap.gif.7f4dd41e3e9b23fbd170a1ee6f65cecc.gif

 

[HlorridiXplorer 10+ year member]

If your wondering how to determine the length of an aero port then the equation is:

((14630000*(D/2)*(D/2))/((Fb*Fb*Vb*1728)-(1463*(D/2))))

where

D = Port Diameter

Fb = Tuning Frequency

Vb = Box Volume (cubic feet)

But for a more understandable version just go to psp-inc.com and on the left side click on port length calculaor and it will ask u for the above information and itll put it into the formula for you. (NOTE: the Formula above is for calculating 1 port! You have to modify the formula if you want to figure out multiple ports.) If you want to use multiple ports then take your box volume and divide it by the number of ports you want to run and then use the above formula to figure out the length for that port and the other ports will be the same length. For example, you have a 8 cu ft box and you want to run 4 4 inch ports. so you do the box volume divided by the number of ports and 8/4 = 2 so then use the above formula to find out the length required for that 1 port with a box volume of 2 cubes. Do the math and it'll be 3.99 for 34 hertz i believe. In a nut shell if you make the ports longer the frequency of the box goes up and if you make the ports shorter than you make the frequency of the box go down.

If your talking about a slotted port then you can just go to audioque.com and click on the sytem design tab and then click on calculate port size and read that cause I dont feel like copying it and that should be enough information for now for you to play around with your box's tuning and port sizes and everything else. Enjoy //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[Enellz 10+ year member]

If your wondering how to determine the length of an aero port then the equation is:
((14630000*(D/2)*(D/2))/((Fb*Fb*Vb*1728)-(1463*(D/2))))

where

D = Port Diameter

Fb = Tuning Frequency

Vb = Box Volume (cubic feet)

But for a more understandable version just go to psp-inc.com and on the left side click on port length calculaor and it will ask u for the above information and itll put it into the formula for you. (NOTE: the Formula above is for calculating 1 port! You have to modify the formula if you want to figure out multiple ports.) If you want to use multiple ports then take your box volume and divide it by the number of ports you want to run and then use the above formula to figure out the length for that port and the other ports will be the same length. For example, you have a 8 cu ft box and you want to run 4 4 inch ports. so you do the box volume divided by the number of ports and 8/4 = 2 so then use the above formula to find out the length required for that 1 port with a box volume of 2 cubes. Do the math and it'll be 3.99 for 34 hertz i believe. In a nut shell if you make the ports longer the frequency of the box goes up and if you make the ports shorter than you make the frequency of the box go down.

If your talking about a slotted port then you can just go to audioque.com and click on the sytem design tab and then click on calculate port size and read that cause I dont feel like copying it and that should be enough information for now for you to play around with your box's tuning and port sizes and everything else. Enjoy //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

on the port calc I got this:

Min. Diameter: 9.83 (this is the height or the length on the outside

Min. Area: 75.93 (explain, I think I have an idea?)

Length of side from sqaure vent: 8.71 (the length right?

 

[Enellz 10+ year member]

bump

 

[Rashaddd 5,000+ posts]

on the port calc I got this:
Min. Diameter: 9.83 (this is the height or the length on the outside

Min. Area: 75.93 (explain, I think I have an idea?)

Length of side from sqaure vent: 8.71 (the length right?

1. thats the diameter you would need if you did a circular port.

2. thats the amount of port area you need, the other two numbers will both give you that amount

3. thats the dimensions for a square vent in terms of the face of the port, it'd be an 8.71x8.71 port in order to get that 75.93 port area

 

[Enellz 10+ year member]

1. thats the diameter you would need if you did a circular port.
2. thats the amount of port area you need, the other two numbers will both give you that amount

3. thats the dimensions for a square vent in terms of the face of the port, it'd be an 8.71x8.71 port in order to get that 75.93 port area

so on this the Port has to be 8.71" tall and 8.71" into the box?