i have a JVC 180 watt head unit and i want to replace my 2 front speakers (4X6) and i don't know what kind of speaker or how many watts
Any 4x6 speaker you want. The power rating of the speakers will far exceed anything your headunit is capable of outputting (which is about 20 - 23W RMS). Go to the store, listen to as many speakers as you can, pick one out that you like and fits your budget. Make sure the speakers are playing off the same headunit, powered by the same amp, and playing the same song. Compare apples to apples.
