I need to apologise and give an update:
I don’t really know why, but the issue has disappeared…no more hum when plugged into my Neumann speakers.
But still, if my quad cortex is not grounded via XLR or USB, I get a ground hum.
This is the case with my active acoustic instruments playing with headphones or a battery powered amp…
When I touch the jack and my guitar strings, the hum goes away. If I connect the metal tailpiece with a metal piece with the jack output the ground hum also goes away.
Toggling the ground lift on the quad Cortex or the phase invert on my instrument doesn’t make a difference.
@PaoloM an@ thank you for your reply, yes the hum goes away if I touch the jack of my acoustic. How did you ground your guitar? Would you mind sharing explanations and pictures, please?
Question to everyone:
What would you recommend in my case?
I have done some research and found three options:
Option 1: grounding Quad Cortex
Option 2: grounding acoustic guitar
Option 3: going wireless
Option 1: Grounding Quad Cortex:
Someone came up with this grounding solution for hx stomp:
What would you do if there is no possibility to plug this into a grounded electric power strip?
Say, you have a mobile setup (quad cortex powered by a battery used with a battery powered amp on a stage without electricity - no power strip to plug it into).
Could you use a similar solution like the one of the link but with a crocodile clamp? But what would could you use to ground it on?
By the way, there’s a hidden feature to reduce hum in the Quad Cortex:
Option 2: grounding acoustic guitar
Ideas for grounding acoustic guitar with a grounding plate:
- ES-GO grounding kit installation - The Acoustic Guitar Forum
- https://youtu.be/12JjkF8yJyI?feature=shared
https://youtu.be/w8kyps9A9pA?feature=shared - https://youtu.be/fTvK-BmA2fM?feature=shared
Idea for grounding acoustic guitar with a grounding bridge:
Someone also commented that installing string ferrules or a tailpiece that you connect to the jack could be easier. Connecting the tailpiece to the jack definitely works on my bouzouki.
If I understand it correctly, the instruments use my body to ground everything in this case.
Is this something I need to worry about in any way?
Option 3: going wireless
There’s a setup idea here.
In theory, no physical cable should also mean no grounding issues, right?
Maybe that’s the easiest way to go?
What do you think and what would you recommend?
I need to apologise and give an update:
I don’t really know why, but the issue has disappeared…no more hum when plugged into my Neumann speakers.
But still, if my quad cortex is not grounded via XLR or USB, I get a ground hum.
This is the case with my active acoustic instruments playing with headphones or a battery powered amp…
When I touch the jack and my guitar strings, the hum goes away. If I connect the metal tailpiece with a metal piece with the jack output the ground hum also goes away.
Toggling the ground lift on the quad Cortex or the phase invert on my instrument doesn’t make a difference.
Question to everyone:
What would you recommend in my case?
I have done some research and found three options:
Option 1: grounding Quad Cortex
Option 2: grounding acoustic guitar
Option 3: going wireless
Option 1: Grounding Quad Cortex:
Someone came up with this grounding solution for hx stomp:
What would you do if there is no possibility to plug this into a grounded electric power strip?
Say, you have a mobile setup (quad cortex powered by a battery used with a battery powered amp on a stage without electricity - no power strip to plug it into).
Could you use a similar solution like the one of the link but with a crocodile clamp? But what would could you use to ground it on?
By the way, there’s a hidden feature to reduce hum in the Quad Cortex:
Option 2: grounding acoustic guitar
Ideas for grounding acoustic guitar with a grounding plate:
- ES-GO grounding kit installation - The Acoustic Guitar Forum
- https://youtu.be/12JjkF8yJyI?feature=shared
https://youtu.be/w8kyps9A9pA?feature=shared - https://youtu.be/fTvK-BmA2fM?feature=shared
Idea for grounding acoustic guitar with a grounding bridge:
Someone also commented that installing string ferrules or a tailpiece that you connect to the jack could be easier. Connecting the tailpiece to the jack definitely works on my bouzouki.
If I understand it correctly, the instruments use my body to ground everything in this case.
Is this something I need to worry about in any way?
Option 3: going wireless
There’s a setup idea here.
In theory, no physical cable should also mean no grounding issues, right?
Maybe that’s the easiest way to go?
What do you think and what would you recommend?