New box in progress need help

[rpfuror 10+ year member]

your kind of doing it backwards, but here you go (very subjective):

you can get 3.25 cu/ft @34hz with a slot

Slot Vent Width: 2.50 inches

Slot Vent Length: 18.00 inches

you can get 3.5 cu/ft @34hz with 2

Round Port Diameter: 4.00

Round Port Length: 14.25

 

[RipDaJacka]

how was I doing it incorrectly?

what program or link do you use for your calculations? Im really interested in learning this stuff for myself

 

[rpfuror 10+ year member]

I have a program I made based on the calculations

Here

http://mobile.jlaudio.com/products_amps_pages.php?page_id=30

&

Here

http://www.carstereo.com/help/Articles.cfm

 

[RipDaJacka]

My ports are bout 20inches.. which I guess took my box down to around 3.25 like you stated.. I will have pics up l8r