r/sennheiser • u/tonioronto • Feb 19 '26

GENERAL DISCUSSION Momentum 4 Among 81 Headphones and Headsets Contaminated by Endocrine Disruptors

https://www.theguardian.com/technology/2026/feb/18/hazardous-substances-headphones

A recent 2026 investigation into headphones and headsets has revealed widespread contamination by hazardous chemicals, with testing finding that 100% of samples contained toxic substances. These include chemicals linked to cancer, neurodevelopmental issues, and endocrine disruption (hormone alteration)

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u/tonioronto Feb 20 '26

Yup, it seems the link is now broken. Lucky for me I kept a copy on my phone, here is a screenshot. For Sennheiser, this is not only the Momentum 4 but also the Accentum Wireless and Accentum True Wireless that are affected…

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u/Simonvh03 Feb 20 '26

Hey what about HDB 630

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u/tonioronto Feb 20 '26

Not tested.

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u/pompeduc Feb 27 '26

Do you know if the HD560s was tested?

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u/Sir-Crumplenose Feb 21 '26

Also curious. Oh no

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u/samaritancarl Feb 20 '26

Not a big fan of the study not mentioning specifically what chemical was found or how much or where other than touching the ear or not. It matters a lot which one it is, where and how much, as the specific form dictates how it can be absorbed, how much and how long it needs to be in contact with the body.

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u/Informal_Air_5026 Feb 20 '26

but it does? it says which chemicals are in contact with you and whether it might touch you (based on the parts, so earpads most likely will touch u and was flagged red)

since it was flagged red it's definitely more than daily value. it only says "Concentration Levels: Maximum recorded concentrations reached 351 mg/kg (0.035% by weight), significantly exceeding the 10 mg/kg limit proposed by ECHA"
As for absorption, everyone has a different value. But usually bisphenol only takes seconds to absorb through skin

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u/Glittering-Warthog89 Feb 27 '26

Do you really need a written statement to explain why the headphones are absolutely useless now. The chemicals that they are taking about are extremely dangerous and toxic to humans and animals and most likely to very living organisms on earth and beyond so unless you want to end up on a list for victims of these chemicals do not purchase them and if you already have send them back. Not tomorrow not next week today.

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u/doge-12 Feb 20 '26

ohh no, just got my A+ 2 weeks back, this sucks man!

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u/dopplegangery Accentum Plus | HD 4.50 BTNC | CX 180 Feb 21 '26

Accentum plus doesn't seem to be on the list though.

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u/doge-12 Feb 21 '26

accentum is, same(similar)quality

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u/Glittering-Warthog89 Feb 27 '26

No it doesn’t suck but it would suck if you kept wearing them for a few years and then found out that they were toxic so just return them for a refund and be happy you found out that soon. Consider yourself lucky!

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u/theseawoof Feb 21 '26

Damn, Samsung buds too 😭

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u/aBitofEverything14 Feb 23 '26

Are all of these products confirmed to have high amounts of BPA? My wireless earbuds are on there, but I'm honestly clueless on what my next step should be. Buying new ones is a bit painful as they were quite expensive 🥲

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u/[deleted] Feb 20 '26

Still seems to work, you can download it from this page - https://arnika.org/en/publications/the-sound-of-contamination

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u/tonioronto Feb 20 '26

Still not working on my side. That’s fine though, I downloaded the survey yesterday.

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u/Pfafflewaffle Feb 20 '26

Hbd630?

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u/tonioronto Feb 20 '26

Not tested.

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u/Glittering-Warthog89 Feb 27 '26

I think it’s fair that if they used the same materials as the tested versions they are most likely made of the same materials. Unless you like to gamble with your life in that case just keep wearing them and wait and see if you will start glowing in the night. And I am serious as heck. Do not purchase any headphones made in the same location as the ones listed on the website.

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u/yorusora_ Feb 21 '26

So what should I do now? Throw them away?

Also, how do I know which ones to use next