This Panasonic Technics A800 has very good sound and ANC and it's general volume and bass volume is much stronger and powerfull compared to Sony MX4 or Bose QC45. But to listen my favorite music genre electronic music and techno i prefer to use the Panasonic RB-M700B because they have somethning the A800 and other expensive head phones on the market does not have at the moment: A Bass reactor vibration system ! I really love the bass reactor vibration system very very very much !!!! It feels like you have a 2.1 subwoofer hifi system. Panasonic Technics A800, Sony MX4, Bose QC45 feels more like an 2.0 weak bass hifi system without any subwoofer. For a very very very noisy ambient or music without any bass (for example old music) the A800 is the best. So I change my headphones depending on the situation. I use public transportation and have a very noisy neighbor that is the reason I own the Technics A800 and the Bose QC45 (only to watch TV and video games but not music). For music I use my 3 pairs of Panasonic RB-M700B. I hope Panasonic will continue to offer and develop headphones with bass reactor vibration system because I can't listen to techno and electronic music on head phones without a bass reactor anymore. The sony Sony MDR-XB950N1 Extra Bass head phones from 2017 have a bass reactor vibration system (my first head phones i had with a bass vibration system) but the new Sony WHXB910NB Extra Bass from 2021 don't has a bass vibration system anymore imo.