I'm finally getting another set of speakers to replace the blown ones in the rear of my 96 Mustang. Last fall I put a new set in the front. At that time I also installed a Kenwood eXcelon KDC-693. I plan on getting a match set of speakers for that rear, so that means an Alpine SPR-57C. My question is, I remember hearing if I get an amp it would not only mean being able to play music louder without crackling/breaking up, but the music at lower volumes would also be a lot cleaner sounding. Is this true? For example, if I turn the volume on my headunit to something relatively low, like 15, would I be able to hear a difference when I installed the amp? Or does an amp only shine at ungodly high volumes? Or would it make a noticeable difference at lower volumes as well? Thanks.

Edit: Also would this be a good amp since I don't plan on getting a sub now, and if I did get a sub I would just get a mono-block. http://signature.crutchfield.com/s_0...3&tp=115&avf=N
I don't need to have my mirrors rattling or anything like that, and 60w RMS x4 @ 4ohms for $130 seems like a pretty good deal.