Deltec Power Plus RF Noise Filter
One of the products that Deltec had on its books originally, 20 + years ago, that was in its day just as revolutionary as their other products were, was the original Power RF Noise Filter.
Harmonix by the Combak Corporation ENACOM Noise Eliminators
ENACOM audio noise eliminators by Harmonix are the easiest - and least expensive - way to filter out annoying RF noise as well as the ringing high frequency distortion caused by the inherent load resistance of interconnect cables and speaker wires.
Ifi-Audio iUSB Power
The most important feature of any USB audio device (USB DAC, USB Amplifier and USB Speaker etc.) is the power supply. The USB system as well as audio, carries its own power. Perfectly adequate to power anything from USB memory sticks to tablet computers; it falls far short from being a suitable noise-free power supply for high-quality music reproduction. To improve all USB audio devices out there, we wanted to develop not just a better power supply, but the best power supply for all audio devices. With the iUSB, quiet passages are whisper quiet. The climaxes are fiercer, and everything in between is richer, more vibrant and no longer grainy.
Opera Audio/Consonance PW-1/ PW-1E Audio Grade Mains Filter
The Opera Audio (Consonance) AudioGrade Hi-Fi mains filter is a Line Conditioner and Line Protector in a single very high quality made unit. This is a true feed-through design providing clean RFI filtered mains at the 4 output sockets with mains spike protection.