this is the trick:
! install your amp and drivers.
2. before playin make sure if the volume control of your HU is set to 0
3.check if the gain of the amp is set to its minimum.
4. while playing set the volume of the HU to 12 oclock (1/2)
5 slowly turn your gain of your amp to 9 oclock(1/4)
6. do this till you reached the clipping point of the drivers then set it to its nominal possition so that even the hu was tured to its max the drivers still can ressist the powers of the amps!