then dont run them at high volums. very few cars come with high end sound setups. unfortunately the speakers that come stock in pakistani cars (corollas, civics swift) are all crap. the ones who say theyr good havnt listened to aftermarket setups.
better you get a 4 channel amp. since u cant chenge the comps now, run the rear speakers from 2 channels on the amp. when u have enough budget, get some aftermarket components and replace the stock ones and power them from the remaining 2 channels.
in the mean time run the front speakers directly from the pre and when u turn the volume up and the fronts cant keep up with the rear speakers, use the fader from ur pre and focus the sound on the rear. this way ur front speakers wont rip themselves at high volume.
