mains filtering

I must say, probably to be expected, that I found this article frustrating. What could have been an opportunity to objectively evaluate upgrading your home electrical infrastructure had upon the mains quality ended in the usual subjective waffle (with most of it sounding unlikely given ASR...

Hi Leaving aside issues such as aesthetics, acoustic noise, cost and the like, what, if any, are the technical and performance differences between an "audiophile" power regeneration device (eg PS Audio, Accuphase) and a commercial online / dual conversion UPS? As I understand it both output...

This is probably too technical for most people here but if you are into DIY work this is by far the best video I have seen on basics of line filtering. It explains for example why there are multiple capacitors put in parallel. Why different devices like chokes are used, etc. And he does this...