I gotta say. The LCD XC 2018 or 2021 edition is still an amazing and notable closed back headphone, especially when given a proper EQ profile! 
I can easily recommend the Schiit Loki Mini+. Hardware based EQ in the analog domain is amazing with this headphone. The LCD XC responds so well to EQ, which is why I think it is still a monster in the audio world.
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