Soundboard Hiss How to fix?

[STEAL7HY]

So I have a RunningMan ProFX16 that has a hiss when I try to record from it. I have 5 mic inputs and 2 computer inputs but it also hisses when all of the channels are muted. Thanks for your help!

[ShredBird]

Some things to try are:
 

• Get a filtered AC power plug.
• Try a different circuit from computers and other noise generating equipment.
• OR try different combos of plugs (could be a ground loop issue).
• Get a ground lifter for your interfaces and/or power:
  • https://www.bhphotovideo.com/c/buy/Hum-Eliminators/ci/15139/N/3992462126
• Use a noise gate if possible.
• Use the smallest amount of gain you can get away with.

[STEAL7HY]

2 hours ago, ShredBird said:

Some things to try are:
 

• Get a filtered AC power plug.
• Try a different circuit from computers and other noise generating equipment.
• OR try different combos of plugs (could be a ground loop issue).
• Get a ground lifter for your interfaces and/or power:
  • https://www.bhphotovideo.com/c/buy/Hum-Eliminators/ci/15139/N/3992462126
• Use a noise gate if possible.
• Use the smallest amount of gain you can get away with.

Ok thanks for the info! Is this Pyle Pro PHE300 Mini 2-Channel Hum Destroyer any good if you know?

Thanks!