I’m experiencing a strange problem between my turntable (Technics SL-1200) and the Uniti Atom.
I’m streaming on my Uniti Atom with an Ethernet cable, not Wifi.
Now when I change to Analogue mode to listen to Vinyl records, I can hear a low volume hum when I crank up the speakers.
The hum disappears as soon as I disconnect the Ethernet cable.
When I plug in short plugs into the phono preamp’s input (Lehmann Black Cube) instead of input from turntable, the hum is not existent. The hum is only there if both the ethernet cable is connected to the Atom AND the turntable is connected to the phono preamp.
Why am I experiencing this issue? Is this some sort of a ground loop? How common is this issue?
I’d rather like to deal with the cause than with the symptoms.
Apart from streaming wireless, are there any other (affordable solutions) ?
Maybe that’s what special ethernet cables for hifi usage are made for? If so, they cost tons unfortunately… (Audioquest Diamond!)
A friend of mine recommended a small device called Blackcube Ethernet Isolator doing a galvanic isolation. Would that solve my problem? Despite its relative affordability (around 100$) I’m afraid to buy one as it doesn’t seem to be made for hifi usage primarily. Other ethernet isolators for hifi usage cost much much more.
Some additional observations:
- using a non-shielded ethernet cable makes no difference.
- switching the Atom’s ground to ‘floating’ makes no difference.
- disconnecting the turntable from power makes no difference. Hum is still audible (!!!)
Thank you for your help…