Megane Speaker

[Matt54]

I want to upgrade the speakers in my Megane.

Pioneer have a model out which are a direct replacement - https://www.caraudiodirect.co.uk/pion...c-renault.html

But, if I were to choose something else, how easy would they be to fit? Is it a case of swapping adapters? What else is better?

I understand there won't be a massive improvement without some sort of sub, but with having prams, shopping etc, space is somewhat limited.

I don't want loud boom bass, but something that when you have music turned up, it sounds crystal clear & punchy. Could this achievable with a under seat sub? Or would just an amp be better?