Well, with if I can answer this differently, if factoring in cost, the most effective upgrade was dedicated lines without a doubt. The cost? Only $400, but sonically worth thousands.
The Source. Always has been...always will be: the most down right major player in a system. Speakers a close second. With the advances in digital in the past few years, most new cd players today, can bring some added happiness to ones's tympanics...peace, warren
Re-thinking my answer, this time without regard to cost, I heartily agree with Warrenh. Other components have improved the sound of my system (some quite a bit), but nothing has increased the music I hear more than when I have upgraded my source.
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