12" Sq Per Cu Ft Port Rule....

[ptcary]

Just wondering how general this "rule" is? Is it safe to use this rule no matter what sub is being used? I have been fine tuning my wall design with amatt's excell program.

[SPL2K]

I dont think its a "rule". Ive never followed it on over 3000 boxes.

I make up my own rules as i go.

[ALPINE408]

I dont think its a "rule". Ive never followed it on over 3000 boxes.

I make up my own rules as i go.

x100000000000 you gotta think outside the box alot of timez the carzyest shit that shouldnt work will work sometimes lol

[USAMPFREAK]

I stick with 15 sq in. per cubic ft. on all of my boxes. Unless forced to have some stupidly small port then I do 10 sq in per cf.

[99_Xploder]

i dont do any crazy SPL setups so i generally try to do as much port area as possible while still maintaining a resonable box size in any daily driver setup

i try to do at least 20 sq for 10's 30 for 12's 40 for 15's...while my setups arent meant to put up numbers they seem to work out pretty well.

[Crazy For Hertz]

I have my own rule to it all depends on the x-max of the subs ,how much power the subs handle,an box size .

Like the box dat build for my 2 flame q`s dat have 18mm of xmax the box is 5 cuft tuned to 32hz an i have 90sqin of port