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Amazon.com: FiiO BTR5-2021 Headphone Amps Bluetooth 5.0 Receiver High Resolution 384K/32Bit Native DSD256 USB DAC Supports LDAC/aptX HD/MQA for Smartphones/PC/Laptop/Car/Home Audio (Regular) : Electronics
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Amazon.com: Audiolab Portable Headphone Amplifier Audio Powered USB DAC Headphone Amp for Phone (Android,USB-C Port) : Electronics
Geekria SJC01 Portable Headphone Amplifier/DAC/AMP with USB and Type-C Input, 3.5mm Audio Jack Output, Compatible with 384K/32Bit Hi-Res Appl Music Lossless Audio, PC, Laptop, Android Phones: Amazon.co.uk: Electronics & Photo
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iFi Nano iDSD Black Label Portable USB DAC and Headphone Amplifier - Upgrade Smartphones/Digital Audio Players/
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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Do you need a DAC? - SoundGuys
Amazon.com: LOKUKA USB C to Dual 3.5mm Female Headphone Splitter, Type C to AUX TRRS 2-in-1 Audio Adapter with Hi-Res DAC Chip, for USB-C Smartphone, Laptop, Pad to Two Headphones, Speakers, TRRS
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Apple Music Lossless, Amazon Music HD, Spotify Premium, Tidal Masters – But Your Phone Doesn't Have a Headphone Jack? DAC Buying Guide! – SomeGadgetGuy
A&K first with flagship ESS DAC for portable hybrid audio system
iFi hip-dac portable DAC/headphone amp review: Sublime sound from a tiny, well-built package | TechHive
ZEN DAC by iFi audio - Super-affordable DAC/amp from iFi audio
Amazon.com: Audiolab Portable Headphone Amplifier Audio Powered USB DAC Headphone Amp for Phone (Android,USB-C Port) : Electronics
EVISTR Hi-Fi Digital Audio Player Bluetooth Portable Music Player DSD MP3 Player USB DAC for Audiophile