# QC Mini =\> No More Grounding and Hum Issues? **URL:** \ **Category:** Quad Cortex\ **Created:** [July 18, 2026, 1:32am UTC](https://unity.neuraldsp.com/t/qc-mini-no-more-grounding-and-hum-issues/22744 "2026-07-18T01:32:00Z")\ **Posts on this page:** 10\ **Page:** 1
**Author:** ![VmusicV](https://avatars.discourse-cdn.com/v4/letter/v/a9a28c/32.png) [@VmusicV](https://unity.neuraldsp.com/u/VmusicV)\ **Post date:** [July 18, 2026, 1:32am UTC](https://unity.neuraldsp.com/t/qc-mini-no-more-grounding-and-hum-issues/22744/1 "2026-07-18T01:32:00Z")
Hi, I was looking at getting the QC Mini for traveling and some other uses. - HOWEVER… does it have the exact same power supply? - HOWEVER…does it have the same horrific grounding issues and hum noise as the QC Thanks AJ ---
**Author:** ![cardinal](https://avatars.discourse-cdn.com/v4/letter/c/b9bd4f/32.png) [@cardinal](https://unity.neuraldsp.com/u/cardinal)\ **Post date:** [July 18, 2026, 5:07pm UTC](https://unity.neuraldsp.com/t/qc-mini-no-more-grounding-and-hum-issues/22744/2 "2026-07-18T17:07:31Z")
It still uses just a barrel connector for power, so pretty sure it needs to be grounded via an output to a monitor etc. ---
**Author:** ![SelfTitledLP](https://avatars.discourse-cdn.com/v4/letter/s/ecc23a/32.png) [@SelfTitledLP](https://unity.neuraldsp.com/u/SelfTitledLP)\ **Post date:** [July 18, 2026, 8:33pm UTC](https://unity.neuraldsp.com/t/qc-mini-no-more-grounding-and-hum-issues/22744/3 "2026-07-18T20:33:02Z")
Its the same as the normal QC aside from some basic functions and I/O ---
**Author:** ![Unguitar](https://avatars.discourse-cdn.com/v4/letter/u/74df32/32.png) [@Unguitar](https://unity.neuraldsp.com/u/Unguitar)\ **Post date:** [July 21, 2026, 6:02am UTC](https://unity.neuraldsp.com/t/qc-mini-no-more-grounding-and-hum-issues/22744/4 "2026-07-21T06:02:29Z")
can you expand this? I have no grounding problem with my QC except for one single guitar. How do you ground it in the studio? ---
**Author:** ![cardinal](https://avatars.discourse-cdn.com/v4/letter/c/b9bd4f/32.png) [@cardinal](https://unity.neuraldsp.com/u/cardinal)\ **Post date:** [July 21, 2026, 7:14am UTC](https://unity.neuraldsp.com/t/qc-mini-no-more-grounding-and-hum-issues/22744/5 "2026-07-21T07:14:36Z")
The QC doesn’t have a 3-prong power cord, so the power cord does not provide a ground connection. The QC instead can be grounded by connecting one of the TRS/XLR outputs to another piece of equipment (monitor, power amp, etc) that has a 3-prong grounded power cord. ---
**Author:** ![Unguitar](https://avatars.discourse-cdn.com/v4/letter/u/74df32/32.png) [@Unguitar](https://unity.neuraldsp.com/u/Unguitar)\ **Post date:** [July 21, 2026, 7:48pm UTC](https://unity.neuraldsp.com/t/qc-mini-no-more-grounding-and-hum-issues/22744/6 "2026-07-21T19:48:59Z")
well, this is a very easy solution. Will test it asap ---
**Author:** ![cardinal](https://avatars.discourse-cdn.com/v4/letter/c/b9bd4f/32.png) [@cardinal](https://unity.neuraldsp.com/u/cardinal)\ **Post date:** [July 21, 2026, 8:02pm UTC](https://unity.neuraldsp.com/t/qc-mini-no-more-grounding-and-hum-issues/22744/7 "2026-07-21T20:02:22Z")
It can be an issue if you want to use the QC plugged into only headphones or a laptop on battery etc, but otherwise is not really a problem. ---
**Author:** ![VmusicV](https://avatars.discourse-cdn.com/v4/letter/v/a9a28c/32.png) [@VmusicV](https://unity.neuraldsp.com/u/VmusicV)\ **Post date:** [July 24, 2026, 2:19am UTC](https://unity.neuraldsp.com/t/qc-mini-no-more-grounding-and-hum-issues/22744/8 "2026-07-24T02:19:59Z")
I get a ground noise hum plugging my QC into a PA system; where the QC is powered off of a different electrical outlet than the PA system. Also - I am using a wireless connection from my instrument (violin) to the QC. I wonder if the wireless has anything to do with it? But I have used the QC wireless in some places, and went straight out into the PA without any issues … in some places. ---
**Author:** ![cardinal](https://avatars.discourse-cdn.com/v4/letter/c/b9bd4f/32.png) [@cardinal](https://unity.neuraldsp.com/u/cardinal)\ **Post date:** [July 24, 2026, 12:23pm UTC](https://unity.neuraldsp.com/t/qc-mini-no-more-grounding-and-hum-issues/22744/9 "2026-07-24T12:23:39Z")
could be a ground loop. Might try a hum eliminator to see. ---
**Author:** ![xush](https://sea2.discourse-cdn.com/flex020/user_avatar/unity.neuraldsp.com/xush/32/5100_2.png) [@xush](https://unity.neuraldsp.com/u/xush)\ **Post date:** [July 24, 2026, 7:39pm UTC](https://unity.neuraldsp.com/t/qc-mini-no-more-grounding-and-hum-issues/22744/10 "2026-07-24T19:39:40Z")
yeah, that seems more like a ground loop issue in that case. Entirely possible that the wireless is inducing buzz, I’ve had that experience before. Should be easy enough to determine if that’s the culprit. Dirty venue power is a whole other subject- not a heck of a lot you can do with that