I had that same issue when my trunk was sealed off. Theres ZERO airflow back there. Once its hot in there. It just gets hotter. Hence the major problem with walling a trunk car.
Whats up everyone. I'm new to this forum but not to car audio. It was reccomended by "TheRamRod" so I came on over here. Currently I have a 1996 Pontiac Sunfire. My substage consists of 2 American Bass XFL's on an Audiopipe AQX2500.1. Heres a vid of it in action. http://www.youtube.com/watch?v=RjdL1jhVUf0