Essential has announced the release of its new Audio Adapter HD. The small adapter can be attached to the PH-1 and allows users to plug in a 3.5mm cable for an MQA-certified audio experience.
https://www.notebookcheck.net/A-year-after-launch-Essential-gives-users-of-the-PH-1-a-3-5mm-jack-and-makes-them-pay-for-it.308238.0.html