I used to be a freak. Boxes had to be of ReVox that tape machine course and still - you could never defeat all the noise. Today, everything is different. It is with the PC, cutting the photographs himself and has his entire CD / DVD collection on a NAS (music and video). All noise-free. All devices (STA-HD receiver, streamer boxes, Nettop PCs Go to playback via HDMI to an AV receiver and then to those little boxes of Auvisio. At this price it's worth a try anyway. I was surprised at what this so come out. Who does not use the meter and only his ears, which probably can not easily determine that this is a product of the low price category. As with all such devices must take into account only a few basic rules when wiring, then hums the subwoofer does not when it should not. When bass reflex tube is, moreover, could not care less whether it's a roll of toilet paper or a piece of high quality material, so long as the dimensions are correct. I am very pleased with the thing.