I traded in my 2003 Mazda6i for the 2006 Mazda6s and noticed my sound in my 03 was better. Not sure if they cut corners or not. Sounds good but not the same. My 03 shakes the car and mirrors at 12 where as my 06 you have to take it up to 20. Plus my 03 had a better sound all around. Any suggestions on speakers not too pricy but that will make it sound much better. Any ideas would be good do not know that much on cars however or speakers let alone. Anyone else notice a diffrence if you have listened to both??

 

i have an o3 6i with the bose and i have never heard this car shake anything at any level...
you might have just had a freak,
or ....

im not sure and im not next to my car at the moment but isnt there a small adjustment on the sub in the trunk of the car... i think you can turn it up a bit from the trunk, im not sure but i think you can. it cant hurt to check it out... if no one responds before i get i home i will ckeck and respond to myself here

 

I guess I forgot to state neither of my cars have a bose system. Sorry for the confusion