Transformer - Lehle, Audio, Line Isolation, High Impedance | Antique Electronic Supply
Your own audio isolator
Buy Ground Loop Isolator - Cable TV Audio Isolation Transformer,Hum Buzz TV/Noise Eliminator Online in Vietnam. B08FRGH4X2
Palmer Audio PLI01 Line Isolation Box 1 Channel
JK Audio Pureformer Isolation Transformer PUR B&H Photo Video
Sonifex RB-LI2 Stereo Line Isolation Unit
Your own audio isolator
How to properly couple an audio (headphones) signal from a big/unknown system (worried about short circuits and ground loops) - Electrical Engineering Stack Exchange
ac - Isolated audio without a transformer - Electrical Engineering Stack Exchange