The HMS Silenzio RF Filter cancel hum and interference noise very efficiently without the typical losses in signal quality. Interference caused by ground currents arise due to multiple grounding with different ground potentials as it is often the case.
Dicke Brummer by Raphael Vogt @ StereoPlay magazine
Ruhe bitte! by Tom Frantzen @ Stereo magazine
Bild- und Tonstörungen effektiv beseitigen by Michael B. Rehders @ lite-magazine.de