IMR R1 - Build Quality The R1 doesn't look and feel as nice in person as it looks in the pictures. I was expecting more heft like I felt with the CF Atlas. A matte finish would have been nicer, discoloration happens quickly and they look plastic-y up close. The nozzles don't always thread perfectly with the body and can sometimes pop out when you pull the IEMs out of your ears. Annoying. Features Open vs closed doesn't seem to change anything. All of the included nozzles suck in terms of tonality. The ones with more bass have a sucked out midrange and hashy mid-treble. The ones with less bass feel lean and peaky up top. Yuck. Fit / Ergonomics None of the stock tips give me a good seal. For some reason even my comply's don't want to seal well, even though I seal just fine with them on my Fourte and Rockets. The cable socket sits at a right angle compared to normal 2-pin cables. Because it's recessed, I can't use any of my other 2-pin cables either. WTF. The cable wants to spread outward from my head when I'm wearing it, which looks and feels awkward. It's also inflexible and cannot be turned in any direction without problems and resistance. I hate this cable. It's awful. For some reason one of the pairs of foam tips included with my old IE80 seemed to fit my ears with these, even though they don't fit my ears on any other IEM. Weird but it works, so problem solved. No issues with driver flex. Sound Unmodded I really don't like these in any configuration of nozzles and tips. Treble always feels ringy and bright, there's a weird fucky midrange response regardless of nozzles (your choice between only lower mids and no mid-mids or upper mids, OR only upper mids and no lower mids), and it's difficult to hear anything aside from bass with most of the nozzles either. Modded, however, I really like the sound you can pull out of these. It's clear the 13mm Be DD is quite dynamically capable, and the ceramic transducer can actually put out quite a bit of detail and information without being overly sparkly. For my mods, I settled with the blue nozzles (as they give the best control of the bass and come empty, which gave me an opportunity to experiment with damping and filters). I cut a tiny square of stiff felt (not enough to cover the entire bore) and put it in the nozzle using the back side of a sewing needle. Then, a tiny square of once-folded teabag (also not enough to cover the entire bore), and then a twice-folded wad of surgical mask filter. Sounds like a lot of damping, yes, but the result is a signature that's quite similar to my modded Fourte, but a bit less V-shaped (more midbass, more upper mids, less top octave and a half). Not quite as much extension in the treble, and spatialization is not quite as precise, but comparable both in dynamics and stage width. I've tried over 20 different damping configurations since I got these in earlier this week, and I think I'm pretty much settled on this one. Still a shitload of quality bass, but I'm a closeted basshead, and it ultimately bleeds less into the mids than the Atlas or Vega did and generally sounds better to my ears. On some stuff I prefer these to my Fourtes too. Conclusions Wouldn't recommend them stock at all at ANY price. Impressed only by the sonics (modded) of this IEM - everything else about it is a nuisance. Won't complain at the price I paid given sonic performance with mods ($175). I'm keeping them. Really hope I can find an alternative cable though. Associated gear was Shanling M0, Mojo, and a bunch of desktop gear. The R1's actually scale quite a bit, particularly with dynamics and smoothness in the treble. I love the sound with these out of the Phonitor 2 I have at my desk right now. Happy to share pictures of my modding procedure if there's interest.