My take on M50x EQ. I used oratory1990 harman tuning for the lower bass, u/scratchr calculated IEF neutral settings for the rest and added a high trebble roll-off over 10khz. Now they
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Harman Kardon TU9200 Tuner Works black Made In Japan | eBay
HARMAN Ready Tune
Xiaomi Sound Speaker Bluetooth-compatible HARMAN Tuning 360°Omnidirectional Hi-Res High Resolution Connection Control Music - AliExpress
SoundStage! Solo | SoundStageSolo.com - Are There Valid Objections to the Harman Curve?
Shopping for headphones? You should know about the 'Harman curve'
What Is the Harman Curve (And How Does It Improve Headphone Sound Quality)?