The car is an `05 E500. There are 2 Kenwood 12s in the trunk in a 1.75cuft (per sub) sealed enclosure. Sitting in it with the motor running it sounds like the subs cant breathe, for lack of better wording. I know they are taking the power but the bass is less then spectacular. I would almost go so far as to say the factory sub-less system hit harder. Right now I have pulled a piece of trim in the package tray out and I can see into the trunk and it helped somewhat, thankfully my windows are tinted so others cant see in as well. What gets strange is when I pop the trunk the subs hit like mad. What is going on? Cliffs: Trunk closed, subs suck. Trunk open, subs hit.