# QA-403 power readings off by 6db

**URL:** <https://forum.quantasylum.com/t/qa-403-power-readings-off-by-6db/1504>\
**Category:** QA40x\
**Created:** [August 1, 2024, 7:33pm UTC](https://forum.quantasylum.com/t/qa-403-power-readings-off-by-6db/1504 "2024-08-01T19:33:19Z")\
**Posts on this page:** 1\
**Showing post:** 24

<div class="post-metadata">

**Author:** ![Claudio](https://avatars.discourse-cdn.com/v4/letter/c/7cd45c/32.png) [@Claudio](https://forum.quantasylum.com/u/Claudio)\
**Post date:** [September 9, 2025, 8:26am UTC](https://forum.quantasylum.com/t/qa-403-power-readings-off-by-6db/1504/24 "2025-09-09T08:26:02Z")

</div>

Hi @emc.audioserch. There is a way to tell the system that it is using differential mode. In the context menu of the “dBV” button, select “External gain” and set “Output Gain (dB)” to 6.02dB. Doing this will display what you are asking for in the “Tiles.” I think the screenshot clarifies everything.

 ![c](https://canada1.discourse-cdn.com/flex032/uploads/quantasylum/original/2X/8/8cfd74d9b8fb3d6bb43186d4943a9c42f90fead7.jpeg)

---

_[View the full topic](https://forum.quantasylum.com/t/qa-403-power-readings-off-by-6db/1504)._