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Bose's consumer range of active noise-cancelling headphones are called "QuietComfort".

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Left side not working at all for Bose QC25

Hi the left ear peice has stopped working suddenly. No sound and the noise cancelling not working either. The right side is fine so not sure what is going on..

These are just over a year old and working perfectly yesterday..

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Same here, had them maybe 3 years, left side stared making funny noises with sound and noise cancelling, regardless if the cable was in or not, now they barely work or at least you cant wear them as they are annoying. Contacted Bose, they qouted $189.00(AUD) for repair with 1 year warranty. I asked if I could upgrade as it seems expensive but they said that was not possible. Considering I have always looked after them well and its not a cable fault I am not happy with the response ! Based on this it is the last pair of Bose I will buy.

さんによる

Identical problem. Had my QC25s for about three years, had many happy travels with them, and then for no reason at all the left cup emitted a few dying squawks and then died.

I cannot live without NC headphones so I’ve already ordered replacements.

The Sony XM3s of course.

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Yep did the same., Sony XM3 snd they are soooo much better than the Bose !!

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Me too . It’s the right speaker.

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Hi,

The left speaker (earphone) is connected to the "tip" of the connecting cable. Ensure that you have fully inserted the cable at both ends. Also try plugging into another source of music etc to see if the problem still exists,

If inserted OK and another source makes no difference try the following:

With the headphones playing, very gently flex the cable where it leaves the plug and listen if the sound comes and goes in the left speaker. Do this at both ends of the cable if necessary. If it does you probably have a faulty termination in the cable connector plug. If the left speaker still makes no sound it could still be a faulty cable or faulty headphones

If you have an Ohmmeter you can check for continuity from one end of the cable to the other. You may have a faulty termination in the cable You should only have to check for continuity from the "tip"of one end of the cable connector to the "tip" of the other end, as only the left earphone is faulty.

If you haven't got access to an Ohmmeter or your tests don't prove anything you could try going to a Bose outlet and ask if you could try a cable. That way you will be able to prove whether the fault is in the cable or in the headphones.

If you prove that the headphones are faulty and not the cable, given that it is just over a year old I would still contact Bose and ask if there is anything that they will do for you. I think that they may be less receptive to a cable problem as opposed to a headphones one.

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最も参考になった回答

I have a QC25 purchased in BIC Japan in April 2015, the right speaker failed in August 2015 and I had it replaced under warranty by Atlas Singapore (local Bose distributor).

The left speaker started having intermittent problems in September 2016, warranty was already over by this time. Nevertheless after reading on other forum about this being a manufacturing defect, I went back to Atlas Singapore, in October 2016, and they replaced this as a courtesy with a 2016 manufactured unit. The support personnel I spoke to was very helpful, and she confirmed that BOSE has acknowledged there were manufacturing issues with 2014 and 2015 units.

So if you have a problem, get it replaced and I would not recommend trying a DIY fix.

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Thanks for the advice,

just changed the cable and the pb was still here,

i called bose and gave them serial number and they just were amazing,

they send me a return UPS ticket and i'll have new headphones in 10 days,

never saw such an easy replacement whereas out of warranty ! (apple should learn form them ! )

thanks a lot guys you made my day !

さんによる

Similar problem (QC35) -- called their support line. I purchased them 13 months ago, so I was 1 month out of warranty. They offered only to upgrade me to the next model (QC45) for $209 + shipping. :/

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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.

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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.

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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:

  1. 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.
  2. Dropped the replacement cost to $71 (including tax) with free shipping
  3. Started 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.

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I have gone thru 3 pair of these headphones - purchased 2, 1 was warranty replacement. The left ear cup quit working for no apparent reason on all 3 pair. The most recent, the replacement pair stopped working and website says they are out of warranty yet I've had them for less than 6 months. This tells me that they replaced with old inventory. I filed for a warranty replacement over 2 weeks ago and Bose responded with a reduced price for a new pair. Why? They should be eligible for replacement. I've already spent over $500.00 for the first two pair and have no plans to spend a penny more. I guess it's time to call in the BBB.

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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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Seven years! I hadn’t realized I had purchased my Bose QuietComfort 25s over seven years ago. Three or so weeks ago, my left speaker just quit working. I have three cables, one with an in-line mic, that all have the same symptom, so I’m positive it’s not the cable itself. I’ll crack it open and start hitting it up with the multi-meter later this week, but 7 years is not a bad stretch!

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EASY !!! NO SOUND IN A SPEAKER, BOSE QC 15-25:
In most cases, it is the speaker that is the problem !!!

Easy to change:

1. 2 screws inside the earcups and the cloth piece (The earcups are "clips" on place...use your finger all the way around until you here click....every 2 cm.....)
Begin the repair by removing the ear cushion.

The pad is held in place by some small plastic clips. Carefully pry with plastic opening tool or nails.
2. Use a scalpel to open the cover of the speaker (NB!! warm up a bit first...hair dryer works fine!)

3.Unsolder the speaker and solder a new one !!

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The earcups are "clips" on plase, use your finger until you hear a click...all the way around !!!!

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Steve さん、ありがとうございました!
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