I've never built my own box, ive always paid someone to do it for me. I am looking to build a box for my IA death row 12. I am looking at 2.20 cubes with 32 inches of port tuned to 32hz. That's what the average box is for this sub according to the IA website. 2.20 cubes is 12x12x26.4 i believe but I dont know what 32 inches of port means and how to tune it to 32hz. If anyone could help me I'd appreciate it.