Really great with FLAC material using foobar2000 and RetroArch upsampler, and also my own electronic music in Ableton Live, going through RME Fireface UCX II at 192kHz (98kHz in Ableton Live), the original cable, and some cheap 3.5mm to 1/4" adapter. Also very good with Moondrop Dawn 4.4mm over phone and CTU-01 cable, although I didn't get it to work in higher bitrates on my phone yet. I'm not sure, but I think I need to get some app for that. It seems like it has less bass compared to listening from the RME interface. Which seems reasonable considering that RME has an external power supply.
This is my first pair of IEMs. But I've used Behringer Truth B2030A and AKG K 271 MKII.
Having two types of drivers seems very basic, at least in modern terms, but it's part of a world of miniaturized Hi-Fi sound systems which fit into your ear.
Yes, my initial assumptions were confirmed. This is the closest thing we have to a virtual reality device like some of the devices described in novels of ... ah, help... the guy who wrote Neuromancer, yes, William Gibson.
Balanced armature - who cares what it means. It screams cyberpunk.