![Amazon.com: Bose QuietComfort 35 (Series II) Wireless Headphones, Noise Cancelling - Black (Renewed) : Electronics Amazon.com: Bose QuietComfort 35 (Series II) Wireless Headphones, Noise Cancelling - Black (Renewed) : Electronics](https://m.media-amazon.com/images/I/81+jNVOUsJL._AC_SX425_.jpg)
Amazon.com: Bose QuietComfort 35 (Series II) Wireless Headphones, Noise Cancelling - Black (Renewed) : Electronics
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Bose disproves conspiracy theories regarding reduced noise canceling performance with QC 35 II update - GSMArena.com news
![Bose fends off claims 'noise cancellation-breaking' firmware update was intended for sly sales boost | ZDNet Bose fends off claims 'noise cancellation-breaking' firmware update was intended for sly sales boost | ZDNet](https://www.zdnet.com/a/img/resize/7a8a74b6fff01b44654ad58b032bb2887d488d04/2019/07/24/771da80a-48a5-42a5-93f9-5f0801c9ba5d/bose-headphones.jpg?auto=webp&height=1200&width=1200)
Bose fends off claims 'noise cancellation-breaking' firmware update was intended for sly sales boost | ZDNet
![Downgrade your Bose QuietComfort 35 II from any version to 4.3.6, 4.1.3, 3.1.8, 3.1.7, 2.5.1, 2.2.1, 2.2.0, 2.1.3 or 2.0.1 : r/bose Downgrade your Bose QuietComfort 35 II from any version to 4.3.6, 4.1.3, 3.1.8, 3.1.7, 2.5.1, 2.2.1, 2.2.0, 2.1.3 or 2.0.1 : r/bose](https://preview.redd.it/iepygxkmk6q31.png?width=2838&format=png&auto=webp&s=cb2258be55bdcd1407295b16ae012a41a58ff128)