Okay, so I have my 2 MTX subs and my 500 watt Orion amp sitting in the garage. I want to know If I could build a good box for in the house that would hold my MTX 10" sub and then could I run my amp off of my Reciever subwoofer output? Doesnt seem like a problem except how do I get poer to it? What could I use for a mpower supply? 12V is all I need right.