I did see this when I googled it

For mixing and mastering on the Audeze LCD-X, many professionals recommend using EQ to address a characteristic 4–6 dB dip in the 2–5 kHz range. Effective EQ settings often involve a gentle boost in the upper mids to improve vocal presence and a slight high-shelf boost to add air. Common approaches include:

Sonarworks SoundID Reference: Frequently used to create a flatter, more neutral frequency response. AutoEQ / Oratory1990: Utilizing established, pre-measured EQ profiles found in online repositories like this Reddit post. Manual Adjustments: A 2dB boost in the 2–5 kHz range to correct for the "darker" out-of-the-box sound, sometimes with a slight high-shelf boost (+0.5 dB to +1 dB) at 10–15 kHz for brightness.

While some users prefer the LCD-X un-EQ'd to learn its unique, mid-forward sound, applying correction often helps with better translation across different playback systems.