School me - speakers and amps

Hi all,

I have some questions I would like help with in order to better understand my build.

I have a set of focal krx2's

I see the watts asks for 100 norm and 200 max.

Q: is that per speaker? meaning I should be giving each speaker 200 watts?
So if I have 2 in front and 2 in back 4 speakers total I need a amp that pushes about 800 watts?

I was looking into getting a 600/4 JL HD. Right now I have a arc audio 300/4 but not sure I am giving it what it needs and wants.

Please help me pick the best amp to server my 100-200 watt speakers.

---
system will eventually be.

krx2's - front
PS 165 - back
12" w7 - sub . 750/1 JL HD



THANKS