FeinTech ATG00101 Audio Ground Loop Isolator Filter Suppressor Noise 3.5 mm Jack Stereo Cable, Black

AaaamazingGGGGGG! is perfect to Block interferences in sound Recording

Funka perfekt. Gör det den skall göra.

Had a constant buzzing sound over one of my two pc’s on my stereo. Placed this device between the buzzing pc and the speakers and It solved it completely.

Mein Setup im Arbeitszimmer besteht aus Cyrus Verstärker + Wharfedale Diamond Boxen + Wiim Mini. Brummschleife an einer Box; auf Dauer sehr störend. Mantelstrom-Filter zwischen Wiim und Verstärker und das Brummen ist weg. Himmlische Ruhe, ohne dass ich irgendeine Klangeinbuße wahrnehme.

In testing, this completely eliminated noise from an external USB audio interface. Some testing was performed using a Siglent 200MHz oscilloscope and a Feeltech FY6800 signal generator. Natural transformer resonance is over 200KHz and the audio performance is pretty flat from 20Hz up to way beyond 40KHz, where some peaking starts to occur. Below 30Hz there is some evidence of non-linearity though it is, in fact, better than another unit I tested recently. Crosstalk was also very good, I could not measure any significant crosstalk at 1V in across the full frequency range. Square wave slew rate was exceptional. The output slew rate was better than 1V/us and although some ringing was evident, this was damped with a 1.2K load resistor. Since the ringing is essentially at the transformer resonant frequency it's way beyond the audio bandwidth anyway. Apart from some non-linearity below 30Hz, which is unlikely to be audible, I can't see any reason it would introduce colouration into the signal. Note that despite a review claiming this unit is not a stereo device, this is not correct. It does operate as a stereo isolator.