The M50Xs are closed back headphones with very good passive noise isolation, making these great for studio and tracking use. The sound signature is fairly neutral with slight boosts to the highs and lows, so these are quite fun to listen to.
Pro Generally neutral sounding but with an added kick to the low end
The ATH-M50x are great sounding headphones with a sound that may fall in the neutral category, but with very slight boosts to the bass and highs; a slightly V-shaped sound. The bass is full and has a lot of power. The sub bass has a hint of elevation though, which can make the bass sound a bit loose on hip-hop or EDM tracks. The mids are fairly neutral with no elevation. The highs are also slightly elevated, which does not add harshness but instead gives the sound a shimmery and detailed feel.
This sound signature of the M50x makes it versatile. It is neutral enough for monitoring use, yet also has just the right qualities to make it a great choice for enjoying music.