how do i hook up 100-Watt PA Indoor/OutdoorPowerhorn in my car grill do i need to put a amp on it if so what kind or can i just run it to my head unit or will that be loud enough need help asap
Do you mean that you want to install a house speaker into a vehicle?
If so, then I would suggest you do not try this. I say this because home speakers have different Ohm ratings than car speakers. Try to install one would either result in really horrible sound quality or damaging something.