People are welcomed to discuss any IEM, good or bad, in this thread. I'll start with a compilation of my very short subjective impressions of IEMs. Some I own or have owned are marked by *, some are long/short auditions. Some were audited years ago, some are recent. I can't possibly recall everything and I'm not going to cover every detail. I'm no seasoned IEM expert and therefore take my impressions with a hefty grain of salt. Of course YMMV. No particular order. This will always be a WIP and will edit due to feedbacks. 1. PSB M4U4: no comments. Comfort was too bad that I couldn't put it in my ears for longer than 10 sec. 2. RHA MA750*: good clarity, a touch of warmth, sounds energetic. Good details for its price. Comfy. 3. Shure SE535*: mediocre. Wasn't very impressed by its pseudo-legendary fame. Regretted owning this shit. 4. Noble 6: euphoric and pleasant sounding. Smooth. Probably not suited for critical listeners. 5. Noble 3: strange timbre. Fat low end. Brain entered shut down mode. No f**k no. 6. Noble 4*: reference-style tuning. Correct selection of tips crucial for non-anemic bass. f'ing sweet vocals. If I had never encountered the UERM 30% off I'd never sell this shit. 7. Noble Savant: UERM wannabe. Possibly the closest sounding universal to UERM, but might to extend as much. A peculiar, yet tastefully done combination of audiophile and reference hardcore. If I worried about the reselling value of UERM, I'd go for this shit. 8. Noble K10: overly euphoric. Wasn't satisfied with planktons. A more refined N6. I can see some people like it, but an absolute no for me. New aluminum version is f'ing ugly. 9. Alclair Reference*: treble-tilted signature. Treble hot, possibly faking details. Very good sense of space. Slightly rolled bass. No match against UERM, but still a nice introduction to custom-Fi (for me). Not recommended for people with treble sensitivity issues. 10. Atomic Floyed Superdarts Ti: an absurd amount of bass. Otherwise good clarity and a fun signature. 11. Atomic Floyed Powerjax*: good clarity. Tight bass. Treble is piercing. It just got me. 12. Westone W40: pretty balanced signature (among the retarded Westone bunch), with more sense of space than N4. But also slower than N4. 13. Dita the Answer Truth: strange timbre, very possibly due to it being dynamic. It's just...not...right to me. Cable voodoo is a huge minus. 14. RE400: dull. Reference-oriented tuning. Surprisingly good imaging. 15. JH Angie*: catastrophic fit. Highly suited for rock music. OMG guitar performance. Decently resolving. Want to revisit sometime if I've got enough money. 16. UE900: personally thinking, it's a scale-down UERM. But not as revealing as Savant. 17. InEar Stage Driver 2: the most f'ing comfortable universal I've ever put into my ears. A bit slow-sounding. Slightly grainy. 18. Campfire Audio Lyra: anemic. Rolled bass, slightly rolled treble. Weired mid spikes. Soft. No. Significant cable noise. The small earphone case was f'ing nice though. 19. K3003: I'd buy it for half of its MSRP. 20. IE800: lean. Treble was hot. Despite being a single DD, sounds very incoherent. WTF was Sennheiser thinking when they finalize this piece of shit?? 21. Westone W60: dark, gooey, slow, bass was fat. Someone tell me the one I've heard was a faulty unit. How can this surströmming be TOTL?? 22. Westone W50: even darker and more gooey than W60. 23. RHA T10i: bloated and fat bass. Darker than my morning coffee. 24. Grado GR10e: (#｀Д´)ﾉﾉ┻┻ 25. VSonic VSD3S*: I have noting to complain at the price I bought it brand new (45CAD). However, said to have very high faulty rate. 26. UERM: neutral. Feel the bass vibration in your jaw bones. Medium-small soundstage. Responds to amplification drastically. Perceived FR flat as Emma Watson with maybe a lift in the upper midrange and lower treble. Not the CIEM for everyone, but a heavenly bliss for me. 27. Shure SE846: overall coherent with slightly bumped lower end. Extends down good, but not up. Not bad, but not great. 28. Shure SE215: OKish sound, shitty construction. I'll take an MA750 or VSD3S over this any time. 29. Phonak PFE 012: Marginally better than iPod earphones. 30. Aurisonics ASG 2.5*: not the smoothest sound. Oh that f'ing bass coupled with a big open soundstage. You either love or hate them. Don't expect typical neutral audiophile sound, this one is a f'ing bass cannon.