I just put these in my 07 frontier. What a difference! The stock 6x9s were blaupunkt paper cones with a little cone in the middle for the highs, I guess. It sounded ok for stock. I replaced the head unit with the Alpine CDE-9874 and added matching 6 1/2s to the rear. WHAT A DIFFERENCE! Once you get the sound adjusted to your tastes, you will love it. I ran the 6 1/2s for a week, along with the stock 6x9s in the front. A slight difference. Once these puppies were in place...WOW! It now sounds like I have a sub and amp. Excellent value! Oh, at the national chain, BB, they are asking $120, plus $70 for install! These are straight forward to hook up, two wires, which are included. OCS, I will be back!