ive been looking for a thread that explains this concept. how do you "tune a box" to whatever hertz you want it to do. while at it, also wanted to know what was "hertz" was and how it affected differently each subwoofer. i hear this vented boxes can get a lot more power out of subwoofers, and im looking to building one myself. people make is sound easy but im thinking its a hard thing to do... calculating the space, and alla that... anybody can prove me wrong?