Fair enough guys. Thanks for sharing your experience. I just thought that if it negatively affects my system then I'll just use it for my plasma TV.
Still waiting on Zen's response. I'm keen to get one...
WRT Stevens response, this is not a power filter but a DC blocker. It could well improve the sound if there is any DC on mains.
The caps on that schematic look too small to me. At a guess I'd say 10,000uF each minimum they would also have to have high
current rating.
WRT Vitas response, the diodes in normal use never switch on or off. They are just for turn on / off so the caps don't
have their voltage exceeded.
To make this properly I'd be using a lot bigger diodes and high spec caps.
Also not sure what the legalities are WRT this sort of thing.
Having said this, they do uses back to back diodes for safety ground lifting in many commercial products so I'm sure it's
legally doable with the right spec bits.
cheers
Terry