Hello, brand new to this forum. Hope to get some opinions. I already have a custom build box for my Subaru Hatch that is a 2.5 cubic foot Wedge (before Sub or port displacement). I am interested in putting in either a single 12 inch DCON or Sundown ported to specs, or just going with a Single 15 inch sealed. I probably would prefer SQ over SPL, but would love to get LOW 30hz range if possible. Any thoughts on either the DCON vs Sundown, or ported vs sealed? BTW, this Single sub would be run off an Old School MTX Blue Thunder amp, putting out 300 Watt Bridged at 2 ohms, so I wanted a dual voice coil 4ohm Sub. Thanks!