this design is very pointless and would be very hard to build but it was a challeng to design. it is about 4 cf tuned to 35 hz. port lenth = 24" long and port area is 13*2= 26 sq". the 2 outter ports are an extra 3/4 long i forgot to take into account the front baffle

 

i like it
what box maker are you useing ?

 

that is a trituned box. i would imagine that was off a site and not from a box program. that would take about five minutes with a calculator to build or rather design.

 

sketch up 5

 

yes its an abc box they are simple to design one chamber is exactly 2x as big as the other.i never said it was from a "box program" i drew it because you dont normally see abc boxes with slot ports, and i am still learng how to use the sketch up program

 

i made a small mistake the port in the middle need to move 1/4" over towards the smaller chamber.

 

i'm still trying to get my box right
and i thought it was a box planner typ thing you had
i have sketch up 5 but had no time to play with that

 

i do have winisd and bass box pro if thats what you mean.

you should get 400 free minuites of sketch up use . try redo downloading it