# How to resolve a ground loop hum from my Direct Stream DAC

**URL:** <https://forum.psaudio.com/t/how-to-resolve-a-ground-loop-hum-from-my-direct-stream-dac/6970>\
**Category:** DACs\
**Created:** [September 4, 2018, 5:01am UTC](https://forum.psaudio.com/t/how-to-resolve-a-ground-loop-hum-from-my-direct-stream-dac/6970 "2018-09-04T05:01:05Z")\
**Posts on this page:** 4\
**Page:** 2

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**Author:** ![John\_Dubya](https://avatars.discourse-cdn.com/v4/letter/j/c6cbf5/32.png) [@John\_Dubya](https://forum.psaudio.com/u/John_Dubya)\
**Post date:** [September 5, 2018, 1:58am UTC](https://forum.psaudio.com/t/how-to-resolve-a-ground-loop-hum-from-my-direct-stream-dac/6970/21 "2018-09-05T01:58:19Z")

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Try : [Upgraded to CAT 7 ethernet cabling - \*remarkable\* improvement in sound quality streaming music to my DirectStream](https://forum.psaudio.com/t/upgraded-to-cat-7-ethernet-cabling-remarkable-improvement-in-sound-quality-streaming-music-to-my-directstream/1957/16)

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**Author:** ![John\_Dubya](https://avatars.discourse-cdn.com/v4/letter/j/c6cbf5/32.png) [@John\_Dubya](https://forum.psaudio.com/u/John_Dubya)\
**Post date:** [September 5, 2018, 2:08am UTC](https://forum.psaudio.com/t/how-to-resolve-a-ground-loop-hum-from-my-direct-stream-dac/6970/22 "2018-09-05T02:08:36Z")

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“The Bluejeans Cat 6a cable has a floating shield design which may help with breaking a ground loop through the shield.”

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**Author:** ![JeffofArabica](https://sea1.discourse-cdn.com/flex015/user_avatar/forum.psaudio.com/jeffofarabica/32/135_2.png) [@JeffofArabica](https://forum.psaudio.com/u/JeffofArabica)\
**Post date:** [September 5, 2018, 2:36am UTC](https://forum.psaudio.com/t/how-to-resolve-a-ground-loop-hum-from-my-direct-stream-dac/6970/23 "2018-09-05T02:36:02Z")

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Tripplite ISO 500. [https://www.tripplite.com/isolator-series-120v-500w-isolation-transformer-based-power-conditioner-4-outlets~IS500](https://www.tripplite.com/isolator-series-120v-500w-isolation-transformer-based-power-conditioner-4-outlets~IS500)

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**Author:** ![bruce-in-philly](https://sea1.discourse-cdn.com/flex015/user_avatar/forum.psaudio.com/bruce-in-philly/32/55_2.png) [@bruce-in-philly](https://forum.psaudio.com/u/bruce-in-philly)\
**Post date:** [September 5, 2018, 8:09pm UTC](https://forum.psaudio.com/t/how-to-resolve-a-ground-loop-hum-from-my-direct-stream-dac/6970/24 "2018-09-05T20:09:08Z")

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If you removed all equipment to the smallest state, and you still get hum, then something is broken. Do the high-tech thing and jiggle the two wires left in the system (on both ends). Then power off, pull the covers, and under a bright light, look for a solder joint break at the RCA jacks. Flex the leads etc with a plastic spudger to open/close the crack.

Before you do that, try running a long long extension cord to another faceplate that you know is not on the same circuit. Also, (so obvious I didn’t ask), move your equipment 3 feet in any direction… just to be sure you are not some emi field.

Peace  
Bruce in Philly

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