SMSL DO300EX MQA DAC Balanced Headphone Amplifier AK4191 AK4499EX XU-316 USB/Optical/Coaxial/Bluetooth 5.1/IIS Input RCA/XLR/4.4mm/6.35mm Headphone Output HiFi Desktop Preamp (Black)

SMSL DO300EX HiFi DAC Headphone Amplifier, AK4499EX AK4191 Chip XU316 USB DAC, DSD512 PCM32Bit/768kHz Digital Audio Converter with 4.4mm/6.35mm Headphone Output (Black)

Fosi Audio V3 300W Class D Stereo Power Amplifier, TPA3255 Chip HiFi Audio Amplifier for Home Theater and Bookshelf Speakers, Compact Design with Advanced Heat Dissipation with 32V5A Power Supply

WiiM Ultra Music Streamer & Digital Preamp | 3.5" Touchscreen, Compatible with Google Cast & Alexa, Stream Spotify, Amazon Music, Tidal & More | HDMI ARC, Phono Input & Headphone Output | Space Gray