It is snake oil.
There is something called a ground lifter, which in a few bucks achieve exactly the same purpose and grounds your system as well as eliminating any possibility of hum arising from ground loops.
It is probably trying to simulate that, but at a price tag suitable for audiophools.
There is something called a ground lifter, which in a few bucks achieve exactly the same purpose and grounds your system as well as eliminating any possibility of hum arising from ground loops.
It is probably trying to simulate that, but at a price tag suitable for audiophools.