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Amazon.com: AC Q3 PRO DAC PC USB Decoding Audio Decoder with Headphone Amplifier for 3.5MM Headphones (Black) : Electronics
THX Onyx Portable DAC Headphone Amplifier: High Resolution Audio DAC for Smartphone/PC/Home Audio - THX AAA - MQA Renderer - Direct Stream Digital (DSD) - ES9281PRO DAC - Magnetic Cable Management
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Headphone Amplifier Portable 3.5 mm Audio Amp with Lithium Battery for MP3, MP4, Tablets， Smart Phone, Digital Player, Computer PC
