A landmark international study across five Central European countries has found hazardous chemicals in every single pair of headphones analysed, from premium models to cheap imports. Authors say the results reveal a systemic failure in consumer safety regulation across the electronics industry. The investigation, conducted as part of the EU-funded ToxFree LIFE for All project, analysed 180 samples of hard and soft plastic components from 81 headphone products marketed to children, teenagers, and adults in the Czech Republic, Slovakia, Hungary, Slovenia, and Austria.


Link to the pdf itself
Product list starts on page 37.
It’s mildly annoying that they didn’t sort the list alphabetically. Also, they didn’t test AKG, which is what I use for studio headphones. Glad I just got some studio monitors, so now I only use my headphones for additional reference.
Thanks!