Well I have a set of CDT components up front and a set of CDT coaxials in the rear. I have a 4 channel amp thats not strong enough for the components or clean enough. So I am going to get a better amp for the components. Now keep in mind that in the rear I found the sound to be coming TOO much from the front only. I am thinking of adding another set of coaxials in the rear and running all those off the 4 channel amp and using the better amp for the front. Or I might just get a better 4 channel and stick with what I have? What would you do? Also, the 4 channel can be taken back to the zeb if I want.