> 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/stax/sr-lambda-pro.md).

# SR Lambda Pro

Powered with harman/kardon PM640 Vxi - High Voltage mode

Many thanks to [Kabeer ](https://www.head-fi.org/members/kabeer.53689/#about)for the loan.

<figure><img src="https://31762434-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-M4NrSugToAwYkW0a8hV%2Fuploads%2FJiE4sndOrZchpvZr9xFg%2FSTAX%20Lambda%20Pro%20with%20vintage%20amp%20high%20current.jpg?alt=media&amp;token=2d8313b0-8bc6-46dd-845f-5a416c9c4d69" alt=""><figcaption><p>Sounds more lush with this amp, but still needs tone control through amp.</p></figcaption></figure>

<figure><img src="https://31762434-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-M4NrSugToAwYkW0a8hV%2Fuploads%2Fsrk4o13DKhCS0lTAvFIg%2F_DSC8606.jpg?alt=media&amp;token=36780f29-cd22-4ee9-a5c7-577c9d0f4bd1" alt=""><figcaption></figcaption></figure>