Amp makes noise when connected to helix

[dhawalmehta91]

my amp makes this constant cracking/buzzing noise when I connect my amps line IN to helix LT's left mono 1/4'' line OUT. I don't have to switch on the helix, simply plugging into the power socket creates this noise. It doesn't happen when I use my podhd 500. Also, I realized this doesn't happen when I connect helix and the amp in the same surge protector box. I might not have the option to use the same power strip for amp and helix. please help

 

Dhawal

[Leftzilla]

It sounds like you answered your own question.  Keep them both plugged into the same power circuit.  Or get a power conditioner.

[Gitarrenbop]

I owned an new HELIX an have the same problem: When Helix is connected to power (240V) and the power-switch is off, then Helix produces a cracking/buzzing/fizzing noise. At this time, there is a lot of voltage on the XLR or the 1/4 Output-Jacks. You can feel it when you touch the cable-connector and with the other hand a ground.

This happen when HELIX is connected to studio-active-monitors or a power-amp of a PA or a external guitar-amp. All outputs are affected.

 

When you turn the powerswitch on the helix ON, the noise is gone. It's scary.

 

Does someone has an explanation? Any ideas?

[DunedinDragon]

I'm sure it's just related to unequal grounding when the Helix is off creating a ground loop through the 1/4" connection.  You wouldn't hear this on a HD500X unit because it doesn't have it's own power supply as Helix does.  I always carry a two outlet surge protected strip with USB ports in my gig bag which I use to power my Helix, my FRFR speaker, and my G10 receiver.  That way I plug everything into the one strip and power everything on on at once after I've made all the connections

and there's no ground loop.