I am getting really pissed off right now.
I've tried various 3d audio video clips (and I found this to be the best to give me a solid orientation of where the sounds are coming from) and I've tried four different earphones and one headphone.
FOR THE LIFE OF ME, I CANNOT PERCEIVE 3D AUDIO.
I can understand the sound coming from the right ear or the left (of course) but I cannot perceive a solid fix in locations between 'left', 'left front' or 'left surround'. Left sounds a bit more muffled than 'Left Front', but other than that, I do not understand where exactly in the left the sound is coming from. Heck my TELEVISION'S speakers gave me a better understanding of something sounding BEHIND my TV set, rather than the earphones themselves.
And I hear comments from people on YouTube claiming that they listen to perfect 3D audio with 5$ earphones, and it's pissing me off!! I even heard the infamous barbershop 3d audio clip, and I wasn't impressed in the slightest. My 5.1 Dolby system does a much better job at giving me the illusion of real audio coming from all around me.
After this, I'm hesitant on spending 150$ on the PS4 platinum headphones when I don't think I'll understand the difference.