the stock tweeters get their power from the stock speakers. when you pull the stock speaker out you'll see an extra set of wires that run to a connecter mounted on the door(was for me). then you'll see that connector runs another set of wires up to the stock tweeter location. for me whenever i replaced my speakers the ones i got already had a tweeter mounted and i just removed the stock tweeter altogether. it's held in by clips but it's very easy to break them cause it happened to me. oh another thing about the rear speakers. that secondary smaller speaker i mentioned that's where the main audio wire comes in at. so in a way the 6x9 is getting it's power from that other speaker. i invested in those speaker harness adapters that you get at circuit city and that's where the adapter plugs into is that smaller speaker so i just got rid of that one as well. anymore questions just ask.