Fixing hum between Focusrite and Rokit5s

DavidAJack · Mar 28th 2018

Since getting the Kemper my home studio has slowly grown and grown. I recently purchased a set of rokit 5's which are great although I am getting a gentle hum from them.

Nothing too bad, but still annoying, especially when there is no sound playing and I can still hear the hum.

I am looking at using a Behringer hum destroyer(see link below) to see if it fixes the problem, running the outputs from the interface through the hum destroyer and then into the rokit5's.

https://www.amazon.co.uk/Behri…royer-HD400/dp/B000KUD2G4

Whats the chances of this working?

All devices are hooked up to the same power supply, a high quality power strip with conditioning. I'm based in the UK and I am in a new build house with good wiring.

lespauled · Mar 28th 2018

I basically have the same setup, without any hum. I have the KRK 6's G2. Not a but of hum.

Kemper + GR-55 + Microphones + Keyboards => Focusrite 18i20 output to KRK 6s.

397f7c95538961c9090da40b2b0b6e229b278069 · Mar 29th 2018

I have these, try adjusting the gain on the KRK's and find the balance between output level and input level?

Even though you're in a new build you might want to check your outlets with a circuit analyzer?

Dean_R · Mar 29th 2018

On the Kemper back panel the different outputs have Ground. Lift, red buttons, I believe there's four buttons, one for each set of outputs, have you tried to see if that fixes the issue? If not, it can also possibly be a USB ground loop noise if your kemper is connected to a computer.

DavidAJack · Mar 29th 2018

I'm assuming it's not an issue with the Kemper as the kemper is not switched on at the time.......or can it still have an effect even when the kemper is not powered on?

Dean_R · Mar 29th 2018

I heard that using the same power strip for the the offending devices could eliminate the problem as ground loops can result from using different wall sockets.

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