Okay, so been doing some poking around and I was curious, whats the deal on th new shallow mount subs? Are they really any good? Other then giving you more space in your vehicle do they sound the same as a typical 12" sub? Do they weigh less overall? I currently have 2 12" Image Dynamics in my car and they are in sealed box and together they must weigh about 70-80lbs or so, I would like to lighten this up some so I was possibly heading to the shallow mount sub route to help with this, now the question is... would this help or jsut be a waste of time?