Hello, I am new to all this and working on cars. I bought a 2010 Hummer H3T. The speaker sound on the drivers side sounds terrible. It rumbles. I thought it would help to replace the door speakers, so I bought new kicker CS speakers and installed them. But now I keep reading that changing the speakers wont really help with the overall sound and that the stock ones are what are optimal for the car. It sounds like in order to really made your car sound better, its gotta be a full setup change-out. I feel like I have made a mistake replacing the speakers and now I am wondering if I should change the rear ones like I planned. I also think maybe its the tweeters that are busted?? IDK what I am doing.