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Quick start guide, DSP download link of K19
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What should I do if the K19 is abnormal? And safety instructions
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K19 accessory list, power supply instructions
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K19's Knob/Menu/Remote control setting instruction
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K19's signal input and output method description
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The sample rate supported by K19
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K19 indicator light description
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K19 DSP Equalizer Introduction
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K19 DSP function instruction
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How to control K19 on FiiO Control?