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Ultimate Ears makes some of the best earphones I've ever heard, with the high end UE line made of custom molded pieces with multiple drivers inside. The UE-11 Pro raises the bar to having 4 in each ear, broken down into dual subs, a mid and tweeter. Audio sensitivity is 110dB at 1mW, which is very efficient. Available in a variety of colors and designs (including monograms) for $1150. I believe that's in a custom metal case. [iLounge]