> 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/iems/ccz-harmony-bc01-pro.md).

# CCZ Harmony BC01 Pro

Sounds much bassier to me. More than KE4. Also I don't hear the ear-gain peak at 5KHz at all.

<figure><img src="https://31762434-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-M4NrSugToAwYkW0a8hV%2Fuploads%2FcYDvm6Z2v8jXwiSQjXUQ%2FCCZ%20Harmony%20BC01%20Pro.png?alt=media&amp;token=ebd1465e-fe26-45bb-93d7-81942f3f927e" alt=""><figcaption></figcaption></figure>