It doesn't have to be a whole separate device. The Audioquest Dragonfly is the size of a USB stick, runs off your phone's power, and provides excellent DAC/amp

It doesn't have to be a whole separate device. The Audioquest Dragonfly is the size of a USB stick, runs off your phone's power, and provides excellent DAC/amp capabilities. Fiio also makes some similar mobile DAC/amps. Here's a nice long article on the details: https://www.computeraudiophile.com/ca/bits-and-bytes/an-audiophile-switches-from-ios-to-android/ https://www.computeraudiophile.com/ca/bits-and-bytes/an-audi...