sadistic

you maybe able to get away with these and some under hung 5-1/4's from pe check out the kick panels here at this link. http://www.crutchfield.com/p_044K100419/Q-...ll=N&tp=130

i suggest a equlizer with a xover in it like this one i know you can find them cheaper too. http://www.crutchfield.com/p_161EQXG/Audio...ray.html?tp=116

use the formula/ info at this link in conjunction with the info above http://mobile.jlaudio.com/support_pages.php?page_id=165

http://www.ecalc.com/calculator/scientific/ use this calculator at link above square root key look like a check with a x inside powers of ten key looks like a y to the power of x av =10 lv=30 vb=864 do the this part first av(1.84x10to the power of key looks like y sub x when the calculator does the y to the power of x key it will put some thing that looks like a up side down carrot. Then write the answer to all of the above down Next do vb(lv+.823then hit the square root key put in av then write the answer down Take the first answer and divided buy the second one Then take and put in to the calculator .159 square root of the answer of the two this should equal 40.63716007346 hertz for the fb Just remember you can plug any thing you want into av or lv or vb that the plug part Av =a 2 inch by 10 inch wxh or area of vent Lv = length of vent Vb = volume of box just try to keep the area of the vent less then a 9 :1 just divide like a 10 by 5 inch port in to this 5/5 and how many section of ten you get and 10 /10 and how many section of 5 you get this would equal 1x10inch and one 1x5 inch the 1x5 would pass but the 10x1 would not it to big here are some other formulas pie times radius squared radius is half of a circle and this trans forms a round to a square vent real quickly square root of

hi bromo i wondered over here for a wile yes it is tuned to high. you will need 2 ports 12 inches long that are 4 inch inside diameter to be 30 hz i think you are using single wall material "3/4 inch mdf" for 5 cuft total right ? if doing the box right you have to split it in two sections of equal portions like 2.5 cuft. you can't just can throw two ports in five cubes it will have a high tune and be very short ports. i will post a link to a port formula and if you need help crunching the numbers i will help ya. just say some thing if you would like the math.

here is what i get from it. the port is irregular sized making it impossible to fit. so i tried adjust it for you doing so i changed size from a 94.5 sqin to a strait 90 sq inch. this is what i come up with box is still the same size i used double thick walls deduct 3 inch from all sides to get a box that is 7.58 cuft the internal sizes were 38x 15x23 divided by 1728 = 7.58 cuft net internal. the port i cam up with was 90 sq inch a 6 x 15 inch x 20 inch = 33hz. the only side i could put it in was a 18x26 inch side panel or in the back of the box opposite the woofers. the woofers would be in the 41x 18 inch side. how i would do it is in the back of the box the port would be a "s" shape firing back. this means you would have to keep it away from the back of the seat a few inches. any ways hope this help you good luck on your build!