When using Vent calculators...

[ssbogger 10+ year member]

If you are calculating a box with 2 ports, the calculator give you a "length of vent". Is this length for one of the ports or for both combined?

http://www.carstereo.com/help/Articles.cfm?id=31 vent length calculator

Click to read more...

 

[vetkilr 10+ year member]

each

 

[ssbogger 10+ year member]

ok so where as the box with two vents at 14.75x3.5x15.75 would only need one at 6x14.75x9.75 keeping the same tuning

Does that sound right? Remember the two vents are sharing the same air space.

 

[Big Dee 10+ year member]

With less port area you also need less port length to keep the same tuning, but this comes at the cost of increased port air velocity.

 

[vetkilr 10+ year member]

Hell they are completely different ports???

If you go with only one port it would half as long, all other things being equal.

 

[ssbogger 10+ year member]

Hell they are completely different ports???If you go with only one port it would half as long, all other things being equal.

the calculator shows me that if i went from two 3.5 x 14.75 port at 15.73 long.

However if i change the number of ports to one, keeping the same W and H the length changes to 1.21. Looks like it is only about 1/13th of the length two.

 

[ssbogger 10+ year member]

also, when it asks for box volume, that is after sub and port displacement right?

 

[Big Dee 10+ year member]

also, when it asks for box volume, that is after sub and port displacement right?

 

yes, and you forgot a slash /.

 

[ssbogger 10+ year member]

if thats all i forget today i'll be good