So I bought a 2005 Mustang GT new when it first came out. It had the Shaker 1000 sound system. It sounded great and definately rumbled inside the car. I recently purchased a 2008 Shelby GT500 with the Shaker 1000 and it sounds NOTHING like the from my '05 GT. Is the Shaker 1000 less powerful now? Is there a way of making it sound better? I took it in for a warranty check to see if it was right, and they said it was..... anyone have any suggestions/input?? Thanks alot!!!!