OK I have a 2005 STi. I already have an eclipe AVN 2454 Navigation unit and am putting together a system. I will be putting a single 12 in JL Audio W3 v2 in the trunk in a sealed box and feeding it about 300w. Will the bass have no problems getting into the main cabin i.e. where were sitting, or will it be muffled as there are no real openings as such for the bass to travel from the trunk to the cabin? I have only put systems in my hatch backs before and this was not a problem as the trunk and cabin are one as such.