> 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/quad-era-1.md).

# QUAD ERA-1

<figure><img src="https://31762434-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-M4NrSugToAwYkW0a8hV%2Fuploads%2F0MrugEn82fspxO4QahAz%2FQUAD%20ERA-1.png?alt=media&amp;token=851165a0-2d44-40fc-be3f-9eeb19e6e965" alt=""><figcaption></figcaption></figure>