Yeah, i've read that page. The only problem is, that many of those systems cost too much. I'am not looking for the best solutions, just an <1000€ update for the previous system.
I haven't found any information about wiring-diagrams of the oem speakers and that's why i'm a bit loss connection wise. I can't also pm anybody, cos I'm a newbie here.
Anyways, our roads here are so rough, that there isn't any point searching for the best sound, it's always ruined by tire noise when driving.
Just looking for that one fellow, who could point out exatly what i need (we must remember that marks may vary a bit here in Europe), i could figure out the rest myself.