Valco VMK20 and their Chinese twins, or how the Finns improved Chi-fi. BT ANC headphones for less and more demanding users | Audio-room
Bose QuietComfort 35 PARTIAL Teardown - iFixit
Trying to Repair: Bose QuietComfort 25 Part 2 (Finale) - YouTube
QC25 repair] While it's actually not that hard to find good tutorials online on how to replace the speakers, I want to really insist about the heat on plastic. Don't do like