Mass is a double-edged sword in the audio world. Circumstances very much dependent, weight can be beneficial – adding it to record players and speaker stands can help dampen unwanted, sound-affecting vibrations, for example. Or it can be less desirable, as is the case with speaker driver cones, as lighter materials are typically optimal for faster cone movement and response.
With headphones, however, low mass is, on the whole, valuable – not only for the driver cone as it pertains to performance, but also the entire build when it comes to comfort levels.
