DAP

I recently purchased a DAP (IBasso DX160) and I'm using a Sony headset (intended for cell phones with mic) I noticed that I don't have to push the 3.5mm jack all the way through the PO/LO/SPDIF port to get proper signal, however, if I push the 3.5mm jack all the way through I feel I'm loosing...

Hi. Strictly speaking this isn't about home audio, but I didn't want to use the cars/beyond the keyboard section as my question is more closely related to the kind of questions normally asked here. I have a Fiio X1 ordered and on its way. My current car stereo is not a CD player, neither does...