> 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="https://31762434-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-M4NrSugToAwYkW0a8hV%2Fuploads%2F4I7So6ApOu0wlqcVQlX3%2FSony%20MDR-401.png?alt=media&amp;token=c2f8d097-f7eb-41f0-9eec-ddbc3d9db8ed" alt=""><figcaption></figcaption></figure>