3.5mm Audio Jack

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...

I'm planning on purchasing the Sony WH-1000XM4 headset. This headset only has a 3.5mm jack. I usually get headphones with a usb so that the sound quality doesn't rely on my soundcard, because I kind of assumed it isn't any good. So my question is whether I should get the Sony WH-1000XM4? Is it...

1st problem--No Audio output from Iphone 6 speakers when i plug in a External Mic(lavalier) into the Iphone's headphone Jack. My iphone using the voice memos seems to receive the audio from the external mic but i dont hear audio from Iphone speakers when i replay that voice memo. why? ext.mic...

Is it safe to plug my headphones (3.5mm) into a aux splitter (1x male to 2x female), then one end of a male-to-male aux cable into the splitter and the other end into my computer's audio output (headphone jack)? a diagram of what I'm trying to say. This would essentially extend the length of my...

I haven't bought these items yet, but I will very soon so I wish to get the best advice. I'm intending on using a computer monitor to display my games. I have the visual part in check already, using a HDMI male to DVI male cable, that s fine and dandy. Sound however, may be a hassle...or at...