Digital inputs in high end 2-channel preamps


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Why don't we see digital inputs in high end 2 channel preamps? With the proliferation of digital devices, a digital input seems like a natural. Is this something we can expect on the horizon?
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128x128mitch4t
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The latest issue of TAS has coverage of the last CES and there were a dozen or so new preamps or integrated amps w/ D/A built in or as an option.