So I recently bought my new JKU (2011). I drove two different configurations (both a sport). One had the 6 speaker system in it and the other had the 7 speaker system in it. I wound up with the one with 7 speakers. Now, my question is this...is there a difference in equipment provided with the two systems? For example, is there an amp provided with all 7 speaker systems, or does it specifically need to say amp on the sticker? The reason I ask is both systems sounded nearly identical. The 7 speaker (with the sub) had a "bit" more bass, but certainly not something that I thought it should have. I'm just trying to see if there is any adjustment I need to make to get a bit more bass from my 7 speaker system.