tigon_ridge
1000+ Head-Fier
Mids are my problem just a bit. I have a feeling that Audeze offered a bit more refined and structured mids. More rich. (I may be wrong, this may be also due to Audeze's warmness. I need some more time to come to final conclusion). But this was something I valued LCD-X the most and it's missing here a tiny bit.
It's likely you interpret a sucked out upper midrange (common among Audeze and Hifiman headphones) as "rich." Enhanced "thickness" in the lower mids is also described as rich. Both of these things are considered colorations. Not to say that your preference is wrong, but let's be very clear--what people describe as "rich" most of the time is just coloration, not fidelity. You mentioned the HD600, which I also own. To me, it has one of the most accurate tonality of any headphones I've ever heard. I prefer it to Hifiman's HE-560. How would you compare the L300 to the HD600?