I want to build my own box never done it before I've got a single dcon 12 in a sealed box and I want to make a ported box but I want it to sound good with a low tuning somewhere around 32-34 so when my sub is in to give me around 36-37 I listen to about 85% rap and the other is country and rock. I'm giving the dcon 400w rms. I've heard of ppl using resin on the inside of the box but I've also heard ppl say its stinks and if your sub gets hot it can smoke. I plan on smoothing all the surfaces in the box down, do I need to mess with all that resin and 45 degree angles in the corners or will a regular box with a good blueprint work??