Right so ive searched and still i am non the wiser! Some questions to answer if you could please.

Running a 50x4 alpine h/u

1 What size are the front and rear standard speakers in cms?

2 If i want to keep the original OR have uprated tweeters then do i need component or coaxial speakers?

3 If i keep the tweeters disconnected then what type of speaker am i after?

4 If i amp the lot up would i need crossovers for each speaker?

Thanks for your time!

3 If i keep the tweeters disconnected then what type of speaker am i after?

I have disconected the tweeters in my Octy and I have used Alpine two way and they sound good.

Hope that helps.

Fabia fronts are 16.5cm and the rears are 10cm, dont bother with the rears and install front speakers (components) along with soundproofing and if you can an amplifer. Be aware of the front door speaker mounting depth as you have the window mech to contend with.