To start I think I should mention I’ve never done a sound system but I’m 99% sure I can do it I’m just hoping to get some pointers so I don’t screw it up. I have the alpine(cheap) system and I was going to start with a custom box for two 12” subs. I was looking at the skar brand specifically. Has anyone used these? I can post links between the two I’m looking at. As for as changing speakers in the car itself I’m a little more weary of that. Can someone educate me please