I see. I have a question. Why does the headphone jack (3.5mm one) loose? For example, if I plug in my headphone into the Fiio E17 jack, I can turn the adapter smoothly. Also, if I reverse the e17, the adapter will come out of the jack immediately.
Moreover.
When I connected my headphone to this jack, there is no sound from my headphone. Even though there is sound from my headphone, sometimes I only heard one side (left or right) gives sound to my one ear. Therefore, Is my Fiio E17 damaged? Thanks.
Remark: My headphone is not damaged since I plug into my computer, and I heard both sound from each side of the headphones.