Why is that? (hijack alert! :eyes

I've got some 6.5 audiobahns with the tweeter up by the lower portion of the wind wing in that little plastic trim piece. Separation is good but actually sounds a little better from outside the jeep (?) I'm swapping parts over to another xj and wanted to improve the sound of the front speakers. Suggestion?
Cherokid
PS. speakers are 100w rms pushed with an amp of the same rating.