Sorry I'm a newbie. I'm not really mechanically inclined. Anyways I just bought a 2019 ram rebel. It was the foret one that came into the dealership back in July. I fell in love with the truck so much. I didnt care it only had the 6 speaker system with nav. And didn't have the towing package with fold in mirrors. Anyways I'm finally realizing the speakers suck bad. And I was on crutchfield. And they are saying I cant buy 4ohm aftermarket speakers to replace the factory ones. And also I dont even know what size the front and rear door speakers are. So any insight or links to YouTube videos will help. I searched up and down the web and can not find speaker upgrade videos