Sound deadening for front speakers. Followed the guide here: http://www.diymobileaudio.com/forum/diyma-tutorials/27-simple-cheap-effective-door-treatments.html
Basically each speaker is mounted on a 6.5" MDF ring, surrounded by non-hardening molding clay. Doors are dampened with Raammat, and plexiglass was used to seal up the large door openings. Finally a piece of foam was mounted behind each speaker to destroy backwaves. This totally seals each speaker in the door and isolates the frontwaves from the backwaves. Needless to say, the mids thump like nobody's business and I hardly even use the sub. (Sorry looks like the pics came out rotated and there's no option here to change it, so you'll just have to turn your head to the side)
