Bose assured: the latest firmware has not worsened the noise cancellation of the Quiet Comfort QC35
QC35 series 2 - Did bose ever resolve the firmware update/anc issue? : r/ bose
Did Bose QuietComfort 35 firmware upgrade make headphones sound worse? - CNET
Bose QC35 II owners complain of degraded noise cancellation after recent updates - The Verge
Optimum Teco guides - Bose QC35 noise cancelling was gimped by recent software update, claim owners Both generations of Bose's QuietComfort 35 headphones have long been some of the most popular noise-cancelling
How to fix problems with Bose QuietComfort 35 II - SoundGuys
Bose is now visiting customers at home to figure out QC35II noise cancellation problems - The Verge