Hello mate,
The Cup has the same setup as pretty much all the other Clios (not bad for a lightweight edition).
The front speakers are 13cm but are component speakers, so there are some tweeters running off the same channel sitting in the dash. The speakers in the doors are a 2-way design.
The rear speakers are also 13cm, but are a 3-way design (incorperating the tweeter).
I brought a Sony MP70 head unit which has 4x52 RMS output. My rear speakers are 13cm Alpine 3-ways, and my fronts are Kenwood components (forgot which ones). I have had the dash off to replace the tweeters and crossovers, and changed the front door speakers too.
The final result is very nice, but the whole thing could really do with a sub just for depth, but Id feel bad for putting it in seeing as Renault worked so hard to save weight.
