The new ATH-M50x has the same sound as the previous version, but with a few added features.
Professional monitor headphones, ATH-M50x, Audio-Technica
Maruszczyk Instruments - From Player To Player - Audio Technica ATH-M50X WH Headphone
As the most critically acclaimed model in the M-Series line, the Audio-Technica ATH-M50x Professional Studio Monitor Headphones feature 45 mm
ATH-M50x
Audio-Technica ATH-M50 and ATH-M50x headphones go Ice Blue
Audio-Technica ATH-M50x Professional Monitor Headphones - Trew Audio
Studio Headphones Closed Circumaural Dynamic 45 mm driver with neodymium magnet system and CCAW voice coils 90-Degree swivelling earcups Earpads made
Audio-Technica ATH-M50X
Audio-Technica ATH-M50xWH Closed-back Studio Monitoring Headphones - White
Audio-Technica ATH-M50x Headphones Review — Gadgetmac
Audio-Technica ATH-M50xBT Headphone Review: Serious Sound, To Go
Audio-Technica ATH-M50x review: The best-sounding headphones under $200 get (slightly) better - CNET
As the most critically acclaimed model in the M-Series line, the Audio-Technica ATH-M50x Professional Studio Monitor Headphones feature 45 mm
ATH-M50x
Audio-Technica ATH-M50X review: A durable standard - SoundGuys
ATH-M50xMGProfessional Studio Monitor Headphones
Audio-Technica ATH-M50x (Black/Silver)