I, unfortunately, paid for the upgraded sound system in my car. I decided I wanted to change out the front set of speakers to voce audison speakers. I paid for the speakers and to have them installed and then come to find out the care throws an error of a yellow flashing speaker if you change out the factory speakers. So I had to pay the guy to re-install the factory HK speakers. Then I contact Alfa and all they can say we recommend you don't modify the car. I was never told when I bought the car that I could not change the speakers if I wanted to. Every car I have ever owned allowed you change the speakers. Not only that when they took the HK speakers out of the car and compared to the Voce ones, the HK ones are super cheap and where not worth anywhere near the amount you pay for the upgraded speakers.