most will prob blow, if its a good, underrated brand then they might last for a while. keeping the signal clean and crossed over will definitally make a difference. but 300 watts is a lot for a tweeter, lol
If you were to give the full 300 watts, definately. If you're referring to driving it with a 300 watt amp, if you stay away from full volume, it could be ok if you're careful. For every 3 db, twice the power is utilized. So starting at full volume, every time you cut the system by 3db, you are cutting the power in half approximately.