TV → LG Oled C1 55inch
Volumio → RaspberryPI 4
Micro HDMI RapsberryPI 4 to HDMI input of the TV set
USB Dac used for Volumio → Audioquest DragonFly 1.5 black
Analog output of Audioquest DAC → 3.5mm to stereo RCA stock cable (not home made)
TV is not connected to the Amp… well not physically connected.
Toslink from the TV set hook to the Pre-Amp, but as this is not “physically” connected to the tv (optical isolation), should not matter here.
My power amp is a pair of Rotel pre-amp (can’t remember which model) and a Rotel power amp.
Rotel pre-amp already have a special power outlet where only the two hot wires are presents, I guess to help to prevent ground loops.
Tried to find on Amazon any kind of male-female RCA connectors that would incorporate a ground lift but didn’t find any… Guess I’ll have to go to my favorite electronic shop, bought some RCA jacks and craft myself some cables leaving the ground not connected to see if that will fix the issue.
I still need to test what will happened if the tv set AC Power is coming from another power outlet than the power bar where all my setup is connected. Do you think that can make any difference ?
I saw some usb isolators on Amazon, in particular the one made by Audioquest, the JitterBug FMJ, wonder If this could help to isolate from ground loops.