chococya96
100+ Head-Fier
Chococya, the PS4 console only has digital outputs, so you need a digital to analogue converter before you can start amplifying the analogue signal. Some cheap options:
In stereo: FiiO D3k, or the D5k
In stereo or processed to headphone surround: Turtle Beach DSS, on eBay. Also has built-in amp, not bad.
The other option is you can plug a headphone or amp into the headphone port on the DualShock 4 controller... Just don't expect the sound quality to be as good as a smartphone or the options I mentioned above.
Would this work:
PS4 > optical to FiiO D3k > RCA to Schiit Magni 2 (normal version, not "uber") > 3.5mm to headphone (AKG Annie/K712)