After a series of complaints about Active Noise Cancelation starting with the ones dating back to January 19, 2017, professional audio equipment maker Bose has now addressed the claims of Bose QuietComfort 35 owners.

However, if you’re still facing issues, Bose has temporarily made it possible to downgrade the firmware through its Bose BTU site. “We’re re-introducing the ability to downgrade firmware QC35 II to 4.3.6 and QC35 series 1 to 2.5.5 via the Bose BTU site for a limited time. Further communication regarding the availability of the downgrade option will be posted to the community at a later date, but if you wish to take advantage of this downgrade option, we advise you to do so as soon as possible.”