Since I now have my Paradigm Titans I am ready to start building my sub. I have decided on a 12" driver probably the Shiva or PE DVC(whichever one is better) and a sealed design. I was just doing some measurements in my room today and I wanted to know if an enclosure with these dimensions(approximately)is possible. (50cm wide x 50cm deep 40cm high). If these dimensions are completely unreasonable please tell me. I think those dimensions work out to 100L. Will a 12 inch driver in a box of this size go deep and manage reference level in a small room? How do I start designing a box? My price range is about $350 Canadian amp not included.