I just ordered one set of the 6.5" Infinity Kappa perfects and was gunna buy another 6.5" pair for the rears for my 07 Roadster but then I started reading about speaker depths being an issue? Has anyone used these speakers, I only got them because they were the top of the line Infinitys.

 

I have the Infinity Kappas all around with a Soundstream amp running them to a Clarion headunit. Sounds very good. The fronts are a very tight fit with the glass and you should use the stock fittings/frame to get them in.

 

Im assuming its the same speakers size in the coupes as it is roadsters? 6.5s all around? I figured the kappa perfects were a bit "deeper" than the kappas were, i could be wrong though

 

I have the Kappa 6.5 Perfects and depth is a tight fit but works fine with the stock speaker plastic trim pieces. I would take the money spent on the back pair and buy a better amp for the fronts only, though. The back speakers won't do you much good, and with a good amount of power pushed to them the sound really comes out of the front stage.