K11&K11 R2R (12)
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What should I do if the K11/K11 R2R is abnormal?
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Operation introduction for K11 and K11 R2R
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K11/K11 R2R signal input, output, gain description
K17 (24)
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Quick start guide, DSP, DAC driver download link of K17
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How to upgrade the firmware for K17?
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How to control K17 via FiiO Control APP?