Wanting help with an ABC sub box
I want to build a box for my single 12" Type R sub. The box I built before is good, built to spec and tuned to 45 but I wanna go with an ABC box. For those who dont know what ABC is, its having 2 seperate tunes, and I want to tune for 35 and 50 hz and run the sub up to 65 (instead of tuned at 45 and running 50) So instead of having 1 spike where its tuned to, you get 2 and more of a flat response inbetween. Right now, my box doesnt like the lows. Ive heard this sub in a different box hit them lower harder, so I know its capable of doing it. Just want to drop the low to 35 and the rock freq's to 50.
The problem is, I have never built an ABC box and I dont know where to start with some information. How does the inside dimensions of an ABC box compare to a regular box? Does it change because of the 2 chambers?
Anyone have a typical layout of an ABC box I can work from? Ive got a guy that works installing into cars that can help me out. He's got the mdf and all the tools needed.
Any help would be appreciated.