Audio system, Renault Megane 2 Sport 2004, approx. €1200.-

Good afternoon to each other, I joined a Renault Megane 2 Sport (2004) a few months ago ( :joy: ) and would like to install a sound system now.Budget My budget comes to around €1200.-. I think something can be done properly. Aim My goal is to install a complete audio system, i.e. head unit, power amplifier, sub as well as front and back speakers. If necessary another PowerCap.Requirements Since I didn’t really have a lot of idea of audio systems, I tried myself a little bit. I don’t know exactly what I have to pay attention to in the loudspeakers. Back coaxial systems (TMT) and front component systems (low tweeters and tweeters in the dashboard)? Now I would like to hear from you professionals what I need to improve or even replace where.evaluated components:HeadunitKENWOOD DDX5025DABPower AmpHelix B Five(does their power out for the sub mentioned below? Don’t come up with the same performance as int ist)SubwooferEton Force 12-600G Thank you very much k: