HiFiJayJay
100+ Head-Fier
First, kudos for the detailed impressions and comparisons, very interesting!
I have a different take between Phantoms and Volt but both in my case are CIEMs so there is that and I suspect it does have importance. When I compared my custom Phantom to the universal I noted than the universal wasn't as thick or powerful in the bass as the custom (yes, I am not kidding) and the universal Phantom had a tad more air. To me Volt is better at separation, layering and staging what we agree upon is bite where the Phantom has more upper mids and lower treble energy so definitely more bite. One thing that might be surprising to some, Phantom has more sub bass tilt where the Volt has more mid bass slam and richer textures.
Worth noting, Volt needs more power than the Phantom though, quite noticeably so it's the first IEM I had to use Medium to High gain in Turbo mode with Hiby R8, don't let the low impedance fool you those babies need current and power to shine.
Thanks for the detailed reply! I have no experience with CIEMs at all so I can't compare with your experience. But the differences you pointed out are really interesting to note. I can't imagine the Phantoms being any thicker than the universals, yikes!
I wish I had the time to run the Volt and Phantoms off all my sources to discern the power comment though. But I was running the Volt off my Paw 6k balanced so I think the power requirement should be quite satisfied?