Campfire Audio Orion Measurements Quick subjective notes: I am actually impressed. At first, I wasn't super fond of them - because I was coming from the Andromedas. C'mon, that's not exactly fair coming down from Campfire Audio's TOTL IEM (which is like the one IEM to rule them all - at least for me) to this entry-level IEM. The best thing to do is to put the good stuff away, wait a few days, and start over from here. To be honest, I've really grown to like them quite a bit in the past few days. Do they have the separation, layering, goose-bump liveliness of the Andromeda? Not quite. And why are we comparing to the Andromeda anyways. Well the answer is because they seem to have a frequency response and timbre very similar to the Andromeda, but without the extension at the extremes. (This is from the Sony ZX2 as a source, but I also suspect the Orion will have a less reactive impedance curve.) A more mid-centric Andromeda would be a good way to put it. The bass is a little bit more smeared, the overall sound is not as clear, the articulation and speed is a notch behind; but really it's not all that far off. In essence, this is an Andromeda Lite. If you can't afford the Andromeda, get this. But really, if you can afford to spend $350, just move up and stretch for the Andromeda. I've kept the UERM for years, and the Andromeda was the only thing that unseated it. This is coming from someone who doesn't collect shit. I'll let the IEM nerds tell us about the technology, number of drivers, number of testicles, erectness and alignment of shafts, TWERKs, and all that other crap I really don't care about. See general measurement notes before digesting the plots below: http://www.superbestaudiofriends.org/index.php?threads/note-on-iem-measurements-changelog.2153/ Campfire Audio Orion Frequency Response (0db REL = 100db SPL) Campfire Audio Orion Distortion (at above FR levels) Higher D2 compared to Andromeda Campfire Audio Orion Impedance and Electrical Phase It's kind of screwy like Andromeda. I measured twice, checked with a resistor, and also took a DC measurement from the multi-meter that read 4.6 ohms. Higher source impedance will introduce more of the diffuse field effect and also increase mid and high treble. May not necessarily be a bad thing.