What are ground loops?

[davidsrsb]

I don't know but I have always assumed product like that uses the circuit (or similar) from figure 5 on this page which goes into the subject of ground loops.

Limited by the size, I would say a diode bridge of a few amps rating and a capacitor in the 100nF range, no resistor.
A signal cable should not be a safety earth, so this is just bonding and probably legal

 

[chartz]

At € 99 they can’t be serious.

 

[sktn77a]

What are ground loops?​

Kinda like crop circles, only different.

 

[Phil Bishop]

Kinda like crop circles, only different.

Equally enigmatic.

 

[Phil Bishop]

Get yourself a piece of wire to run as a separate ground wire to use to experiment with the signal ground. You might connect this from tonearm ground to hifi rack, or chassis of amp etc, just play around till something changes.

Excellent advice