Corsa-B.uk - Vauxhall, Opel and Holden Corsa B Owners Club

hi, just need to know if this will work,or just a bad idear.

i wanna upgrade the door speakers and the rear ones, and then have my jbl 6+9s in the parcel shelf running off my amp.
basic set up i know but its all i need as would rather spend my pennys on makeing the car look nice first.
had a 1000 wat vibe sub in my old sri but leavin that in the garage this time as it was just to much for my delicate ears lol.
so just wanna use the amp to run the 6+9s instead, is it worth it or shud i just run the lot off the head unit???
any help would be appreciated,thanks

That set up will work. but i would loose the standard location rears if you want to run 6 x9's. Running both isnt ideal.