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Bose's first wireless noise-canceling headphones, praised for their industry-leading noise cancelation technology and comfort. Released in June of 2016.

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Left speaker only working intermittently, crackling noise with ANC

Hello good repair-inclined folks,

Recently, my Bose QC35 headphones have developed an annoying fault. At first, I noticed a crackling sound in the left speaker, which is motion-sensitive and linked to active noise cancelling (no ANC, no crackling). Later that day the left speaker kept dropping out.

Has anyone dealt with this? Is the driver shot? Any repair advice would be appreciated.

Thanks!

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@cistron check the wire and solder connections on the driver. Resolder if possible. Also check the wires in the barrel connector. If those are all okay you know it is the driver but it does sound more like a bad connection

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Thanks for the advice. Let’s see if I can take it all apart and resolder :)

Maybe a stupid question, but what is the barrel connector?

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Sorry to resurrect this… How did you get on?

I have a similar fault - first crackling with ANC on, but fine without. Few days later, either speaker can drop out completely.

Even now, it seems fine for first minute or two after powering on.. then lots of weird noises and failure to play music, then the power button doesn't turn them off. So many symptoms its hard to write a sensical description!

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Sadly, they’ve been sitting on my shelf untouched for a long time. I started disassembly and got stopped in my track when I saw the tiiiiny gage of the wires used to connect the PCB. Thinly coated, no way for me to keep them apart and my soldering iron wasn’t small enough. :/

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