For best audio results, make sure the right headphone (marked with an “R”) goes in your right ear, and vice versa.

If you can’t hear anything in your headphones, try adjusting your phone’s volume. There may also be a volume adjust panel on the headphones cord itself.

Chord Mojo - A large DAC with a secondary headphone input that plugs into your phone via USB cable ($599 USD). While considered fairly high-quality, the size of the unit and overall price are common complaints. [2] X Research source AudioQuest Dragonfly - Another USB DAC with a headphone jack. Comes in standard Black ($100 USD) or the higher-quality Red ($198 USD) models. Common complaints include poor volume control and less refined audio than more expensive counterparts. Arcam MusicBoost S - A DAC built into an iPhone 6 and 6S case ($190 USD). Common complaints include it’s limited compatibility (it won’t work with a 6 Plus or 6 SE), mandatory charging and limited improvement to sound quality. Make sure your DAC supports a 3. 5 millimeter set of headphones before purchasing it– while most do, you don’t want to order an expensive piece of hardware only to find that it doesn’t work with your technology.

If you can’t hear anything in your headphones, try adjusting your phone’s volume. You should also check your headphones’ connection to the DAC, the DAC’s connection to your phone, and any volume options on the DAC itself.