I model this after my current wall mount headphone hanger brought from Aliexpress. 

I added cable management nob below the hanger  as most of my headphone comes with long cables. 

I printed it with tree support and it comes off quite easily. I use default settings (2 wall, 15% infill, 0.2mm layer, 0.4mm nozzle) with Bambu PLA filament, and it is able to withstand 400g headphone (headphone + 3m cable + XLR connector) without any issue. If you have heavier planner headphone, please increase your infill density accordingly.