> 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/hv-99-interfunk.md).

# HV/99 (Interfunk)

Dayum... Should be less bassy with stock foam. But this is fun too.

<figure><img src="https://31762434-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-M4NrSugToAwYkW0a8hV%2Fuploads%2FfTp7HQwo4Sbf9Fpj57rW%2FKoss%20HV99%20Memory%20Foam%20Pads.jpg?alt=media&amp;token=c7072b56-a5c7-41fe-96cc-3c7dd7fdf3ed" alt=""><figcaption></figcaption></figure>

<figure><img src="https://31762434-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-M4NrSugToAwYkW0a8hV%2Fuploads%2FIYBJWgNckwpJkMQRDLXQ%2F_DSC8554.jpg?alt=media&amp;token=057c2116-083f-4911-a49d-64837995dbb2" alt=""><figcaption></figcaption></figure>