Would it be crazy to have two of these: http://www.partsexpress.com/pe/showd...number=295-560 In a large ported box? I would build it about 20" wide, 40" tall and 30" deep or so (standing upright like a file cabinet ) I know the Titanic's are bigger and all, but they are also a big spendy and I think two 15" Quattro's would be able to produce a lot of bass without a lot of excursion. Any input? Oh, Parts Express rules!!!