I am wanting to get high quality sound from an aux input in my truck without buying a new radio. (My radio has no aux input). I used the ipod iTrip for a while, but that really sucks in sound quality. While looking at XM, I found a thing called an FM modulator. I think it hooks directly to the antenna or something? The one I say cost about $30.00. Is it possible to make one? Does anyone know anything else about them? https://www.amazon.com/exec/obidos/...81692-8120957?v=glance&s=electronics&n=172282