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Amazon.com: FiiO Q3 Amplifier Headphone Amp High Resolution DAC DSD512 for Smartphone/PC/Laptop/Home/Car Audio 2.5/3.5/4.4mm Output : Electronics
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iFi Audio hip-dac2 Portable USB DAC/Headphone Amp Combo Review: The Sequel Adds Tremendous Refinement! - HIFI Trends
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