In article ,
Powell wrote:
Most audio stores will allow you to demo these devices for free so there
is no financial risk. The cost of these units start at $200 and run up
to $4,000 depending on your needs.

For a few chokes and capacitors at most? Some people have more money than
sense. Better to buy equipment where the maker has catered for possible
mains borne interference.

For a periodical review of these units check out Stereophile issue Vol.
17 No. 12.

Love to know how you arrange for a 'dirty' mains supply to be anything
like typical.

--
*Eat well, stay fit, die anyway

Dave Plowman London SW 12
RIP Acorn