Hello together, In my TT-Coupe 225er a Radio Concert 2 with normal serial loudspeakers is built. I am not satisfied with the performance nor with the sound. Now I think about a new radio e.g. Sony CDX-R 3350 o. Sony CDX.S 2220 – also because of the flat front regarding the TT-folding or the one of Audi. ” Ubgrading ” front door loudspeakers. These are supposedly easy to replace and should sound better. Do you have more experience or what brings more.? ng on Bose is too expensive. Thank you for your help. Greetings from Düsseldorf by Wolfgang