My wife runs hers through an FM modulator (isn't FM modulator redundant?) out of the headphone jack and it sounds reasonably good. Not fantastic, but passable for a non-audiophile. I listen to it and it doesn't bother me, but don't think I could live with it if it were my car.
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-Jeff
Rome did not create a great empire by having meetings; they did it by killing all those who opposed them.