> For the complete documentation index, see [llms.txt](https://itsgreq.gitbook.io/headphone-measurements/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://itsgreq.gitbook.io/headphone-measurements/sony/mdr-401.md).

# MDR-401

<figure><img src="/files/rn7gFkfiFZ6VZs6qWQa6" alt=""><figcaption></figcaption></figure>