> 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/yamaha/yamaha-hp50-a-modified.md).

# HP50-A + Mods

1 layer of Arctic Cotton over the driver rear (driver size), 1 donut of felt around the edges around the back of the driver, new slightly thicker on-ear pads.

<figure><img src="https://31762434-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-M4NrSugToAwYkW0a8hV%2Fuploads%2FMll667SZodK4faV9grOM%2FYamaha%20HP-50A%20modified.jpg?alt=media&amp;token=8336b6c8-f853-4004-b2e1-faa21e51ebe1" alt=""><figcaption></figcaption></figure>