I had these awful Infinity reference speakers with super harsh highs. I took those out and replaced them with the polk db series 6 1/2' component system in the front and 6x9's in the rear. These sound a lot better but for some reason I"m not completely sold on them. To me they seem to be missing some crispness or sharpness that other speakers have. I've tried adjusting my JL audio 4-channel amp but it didn't change this at all. Any thoughts on this?