Amazon.com: Apogee GROOVE - Portable USB Headphone Amp and DAC, Bus Powered for Mac and PC, Made in USA : Apogee: Electronics
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Apogee Electronics Groove USB DAC and Headphone Amplifier Bundle with Neumann NDH 20 Closed-Back Monitoring Professional Studio Headphones - Walmart.com
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Amazon.com: Apogee Boom USB Audio Interface For Musicians, Podcasters, and Streamers- Featuring 2 channels, Studio Microphone Pre Amp, 24bit/192kHz sample rate, hardware DSP, Headphone Amp, and Ableton Live Lite : Musical Instruments
Apogee Electronics Groove - 24-Bit 192 kHz USB DAC and GROOVE