special_formula

i need help on dimensions and how to tune a box for 2x dc level 4m2 15" in a ported enclosure please help tune to 32/34 hz the space i have to work with is 43" wide subs will be on the side panel 43 wide 22" height 19" depth Interior Volume cubic feet 8.61581 /// 8.19581 with displacement the subs combined have a total of .42 displacement the subs need 3.25 cube feet each .. or 6.5 cubes total it would be nice to have 1 port in the center .. as for making the box smaller or larger to tune the height can be taken down or up i know how to find the cube feet of a normal box.. i just dont know how to calculate and tune the port.. / and find the displacement

thx everyone.. ya the d3400 is brand new .. im must wanting a sturdy system built right.. ya think 2x d3400 is enough for this setup ?

so i have a d3400 in the front of the car and want to add a seccond batterie ... can i add a D3100 or at D7000 in the back of the car ? will there be any inbalance ? or should i juust get a 2nd d3400 this is powering a dc 3.5k and another amp pushing 2k 3 runz of zero front to back mechman 270 alt on the way