Hi-Fi and Pro Audio

With the substantial effort and budget put into achieving superb sound quality, it would be a pity if EMI from power lines and ground ruin it all by adding its "creative content" to the sound.

OnFILTER' CleanSweep® AC EMI filters were designed to deal with industrial noise that exceeds anything that one could encounter at home or in a studio, often by several orders of magnitude.  CleanSweep® filters are capable of attenuating high-frequency artifacts on power lines and ground from tens of volts easily found at the factories down to just a few millivolts, enabling operation of super-sensitive semiconductor equipment.  EMI found in home or in a studio environment is easy for CleanSweep® filters.  The filters offer noise suppression in both differential (between Live and Neutral) and common (Live/Neutral to Ground) modes and, uniquely, in ground, completely isolating your equipment from EMI on the mains.

Importantly, CleanSweep® filters are not transformer-based.  Transformers in power line present high output impedance for the load, i.e. your amplifier.  This leads to variations of supply voltage with current peaks and, as a result, in intermodulation distortions, reduction of dynamic range, and other artifacts.  Transformless design allows for full dynamic range without added distortion.

CleanSweep® AC EMI filters are not the same as the conventional filters you can find elsewhere. Regular filters are designed to perform only in an artificial laboratory conditions with 50 Ohms power termination.  When plugged into actual power mains, they may amplify noise - see above.  CleanSweep® EMI filters are designed for real-life applications (they perform well in the lab too).