Loudspeaker conversion

Moin people! So here’s the thing, I finally decided on speakers for my car. I think I’m going to start slowly! I’m going to buy only the new speakers for the door and the amature board. I was thinking about the Canton RS 2.16! (Canton RS 2.16) What do you think about it? I want to do without a power amp and test how it all sounds like… worse than with the standard Golf 3 speakers it can be How does it look like with the external crossover? How and where do I put it best? What do I have to bear in mind? Should I definitely install new cables? What is it like with the connections? The whole program stop, don’t have a trace of! Would be grateful for any comment!