How to tune for hertz?

[Ben G.]

Hey, I am wondering how you calculate and tune for differnt hertz, when building a box. I know hertz is cycles per second, but what is the difference in higher hertz and lower hertz. i see alot of people tune there boxes to like middle 30s. I am just wanting a basic understanding of what different hertz do and how you create different hertz when building a box...thanks alot.

[uhoh_45]

listen to the different hz and see the difference between the lows and highs

just play from computer speakers at normal volume

[Ben G.]

i need more info...like how to tune for hertz

[Marlo Stanfield]

In a ported enclosure you can tune for specific hz by adjusting the length of the port... In every different sized enclosure the length will differ for whatever you are trying to tune to.

[Torres]

port area also plays a role. the more port area you have, the longer the port needs to be to maintain a frequency tuning of a port that has less port area. the port with less area can be much shorter. also you dont want too much port area or too little port area. general rule of thumb is 12-16 sq inches of port per cubic foot

[Ben G.]

ok, so how to i calculate port area.

[andym85]

ok, so how to i calculate port area.

*sigh*

for a square its height * width

for a circle its pi*r^2

8th grade geometry

[Boon]

Would you like us to hold your hand while you do it?

Honestly.

http://tinyurl.com/yzfmg2o

[Ben G.]

wow im a highschooler and just learning the important stuff about car audio. You guys started somewhere too. But thanks for the help.

[uhoh_45]

wow im a highschooler and just learning the important stuff about car audio. You guys started somewhere too. But thanks for the help.

trial and error bud (not trying be a dick) but i learned on my own after failing i picked up a pen and paper and calculator and started reading

plug in your numbers in the http://www.the12volt.com/caraudio/boxcalcs.asp figure out how many cubes your box is.

box = X = 5 cubes

so in order to find my port area i times how many cubes my box is by 13-16 to find out how many square^2 of port there is

so 5*15 is 75 so i'd have 75^2 of port

once i have that need to plug in some numbers to make that 75" of port work with you so say my port is 12" tall i need it to be 6.25" wide

i get all that and take it here and plug in my numbers and come up with how long my port needs to be

pretty simple