I just picked up a pair of these on a whim (not sure why I didn't earlier at this price) and was impressed, almost irritatingly so TBH. Sounded really good. Then early last night I dug out my old C&C BK which has mostly been languishing - I used it on several IEMs for years but not as much the past 2 years or so with other equipment. It's battery is *still* strong, amazingly and it just keeps ticking.
Anyhow the synergy between it's "high" gain setting (no soundfield boost, no bass boost) (source last night was 50/50 LG G8 Qobuz and Qobuz on my laptop via a cheap little AuxLink hi-res USB-C dongle) is uncanny. It sounded really good on everything else I fed it, but when I connected it to the C&C ..... well I have barely taken them off and stayed up FAR too late as a result (and they're back on my head right now since waking). It's phenomenal - the tell-tale sign is me just sitting around playing track after track that I know as well as just letting tracks advance without paying attention. Hip-hop, acoustic, orchestrated... I've not found a track with this combo I'm not loving. Thick, warm, bright, detailed, textured. I'm just astounded. It's ridiculous and I'm considering letting a couple other cans go as a result. Ridiculous.