2 ohm /4 ohm difference
 

i want to swap out a blown 6x9 speaker in my lude and the speaker in there is a 2 ohm and i have a 4 ohm. will it sound shitty? whats the diff?

That's fine, it will just sound a little quieter back there. There is really no harm in doing that though.

I swapped my 2 ohms for my 4 ohms pioneers and I immediately swapped them right back. I have a 5th gen and the 4 ohms produce barely anything compaired to the 2 ohm factory ones.