More news from 6moons and it looks like the printed circuit board designation mentioned above is indeed a new dedicated headphone amp from Bakoon.
"more and more people love the AMP-11R as headphone amp. We thus wanted a more affordable model superior even to the 11R for this purpose. With an output impedance close to 1MΩ, expect up to 1/10th the headphone distortion with the HPA-01's current-mode output. We believe this will be a true game changer. It is a larger one-box solution with internal battery power supply derived from our EQA-11R."