Hey there guys i'm new to this but i have installed a aftermarket single din DVD and ordered the wire harness off eBay that connected in my stock harness in the dash so took the factory one out and everything works great but now i'm looking in to changing my speakers the front doors and the rear ones.The stock speakers have the amp on the back of them and what would be the easy way to do it i don't care if i have to take the stock amp off the back of the stock speaker out i\m fine with that today when i pulled the door panel off to see what i was getting my self in to there were 4 wires Green,Red,Black and Gray so Green and Red are going to my tweeters and Black and Grey to the speakers and i'm not gonna install a amp yet for the aftermarket speakers right now later on maybe so any Help thanks And oh yeah i still run the factory tweeters?