> 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/koss/pro4-aa/pro4-aa-+-fostex-t50rpmkii-pads.md).

# Pro4/AA + Fostex T50RPmkII Pads

Much more reliable graph, and almost no deviation from pressurized stock pad sound.

<figure><img src="https://31762434-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-M4NrSugToAwYkW0a8hV%2Fuploads%2F7AXlMFsPyxFlN1Jwx2UY%2FKoss%20Pro4AA%20%2B%20Fostex%20RP50MKII%20Pads.jpg?alt=media&amp;token=72099f49-efe5-4fea-8f2f-9a606f8e565b" alt=""><figcaption></figcaption></figure>