Just found out that the rear speakers werent done by the previous owner, it was done by the dealer. I think the Previous owner too them out of the car before he returned the lease and dealer had to put something there. I have the report in front of me saying that put 2 speakers at the back. According to the sales person they were either blown and empty so they fixed the issue by putting 2 new speakers. I hope he didnt cut anything. Soon i will find out.. I am about to place my order on 2 woofers.