> 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/pfr-v1.md).

# PFR-V1

<figure><img src="https://31762434-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-M4NrSugToAwYkW0a8hV%2Fuploads%2Ft8DEN8XISF2VuxIuBqWc%2FSony%20PFR-V1.png?alt=media&amp;token=8b7c1ac5-4a2f-4df9-a126-1508e21aacdb" alt=""><figcaption></figcaption></figure>