Re: QC35 II Noise Cancelling doesn't work after last firmware update
I ordered my QC 35 II a few days ago and afterwards came across this thread. I hope that my headphones don't have the newest firmware already installed and if so I will try to downgrade.
So I just reveived my pair. It came with firmware 4.1.3, manufacturing date 9th March 2019. I did a test. Since I'm not in the office right now, I played some office ambient sounds (people speaking, keyboards clicking, telephones ringing) on YouTube through my speakers. With ANC on high and no music playing through my headphones, the sounds were reduced by I would say 80% but still audible. With music playing at moderate volume I could not hear ambient sounds anymore. This was on 4.1.3. Then I performed the upgrade to 4.5.2. I cannot make out any difference to 4.1.3, although I don't know how well the headphones performed with a previous firmware (pre 4.1.3). I will probably perform a downgrade and test later. In both cases - 4.1.3 and 4.5.2 - I do hear a difference of ANC between high and low. Of course these results are purely based on my personal perception.