They were purchased in July 2022. All year long, we used at least two hours per day. The right channel has just now, in August 2022, died down three times. The ears are lovely, but who cares when false marriages are all around. And I have no idea why people listen to complaints on phones or give them to their ears for a thousand (initially giving out a nasty sound). However, while the frequency characteristics and dB of all headphones are essentially the same, other considerations, such as: excellent wire or G-plug (not beautiful, but reliable)
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