Left side not working at all for Bose QC25

"jt8dtan



Rep: 25




1"

"I had the same problem, traced it to a bad contact to left side speaker itself, inside of its enclosure. Pressing a little on the speaker membrane re-established the contact. As the enclosure is sealed/glued, I couldn’t get inside to resolder it. Bought in 2015, so this may be part of the defect series mentioned by another user.

(Furthermore, the coil wire seems glued to the membrane so with sound vibrations it’s entirely possible to cause fatigue in the small conductor, so I don’t know if I’d have been able to fix it even if the speaker enclosure wasn’t glued in, because the membrane is plastic so it would have reacted poorly to a soldering iron.)

I’ll order another ANC headset but not Bose."

Same problem here. If you turn on the noise canceling without having the cable plugged in, I can only hear it kick in on my right ear, so no cable issue. Mine are over 5 years old, so I'll see if I can get a new speaker and replace it like this guide suggests.

"For posterity: I had this same problem recently with a QC25 from 2015. They are out of Warranty. Poking around various Bose forums it is clear that this is a manufacturing defect that has impacted many of these units.

The Bose repair website offered a new replacement for $135. I was concerned that this unit would have the same problem as the old so I called them up. I was initially offered the same deal, but after explaining that I had seen this was a known defective unit, expressing my concerns about such a short lifespan for a $300 pair of headphones, and my concerns that another QC25 would have the same problem, they:

Assured me that this is a newly manufactured QC25 with the defect addressed. This is plausible because based on forum posts it seems they were replacing them with QC35’s for a while; if they are dealing with mass replacement it would make sense for them to do another run of repaired QC25s.Dropped the replacement cost to $71 (including tax) with free shippingStarted a new warranty for the new unit (1 year, same as the original warranty)

Long story short, it is worthwhile to contact them even if you are well out of warranty. I’m happy with the resolution considering how old the unit is at this point."

I have QC25 bought in May 2015 and just got that problem with left cup yesterday. I’m in UK. Not quite satisfied with the response as I was offered a new pair of same headphones for £135, with one year warranty and having to send the old ones back. But, in my local shops you can easily buy these for £139 (or less if you look around) with 2 year warranty, and I’d still get to keep the old ones. I asked if I could upgrade to the newer model, but the only option they gave me was 20% discount on QC25 - so all in all £25 quid discount on same headphones, providing I’m returning the old ones. No help at all. I’d be perfectly fine with that if it was not known manufacturing defect - my pair is otherwise in pristine condition and not really used that much. I like them a lot, shame, as I will probably buy Sony now. I’d be happy to pay under £200 for QC35 replacement, or if I got the price as above I’d go for it too…

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