[DavidK35]

Magnificent Audio Magic Box Audio Refinement Transformer:

 
http://www.ebay.com/itm/Magnificent-Audio-Magic-Box-Audio-Refinement-Transformer-/280915161455?pt=US_Audio_Cables_Adapters&hash=item4167d9316f
 
 

 
 
So what exactly is a toroidal  amorphous core 1:1 repeater transformer?

 

[kevin gilmore]

Its an isolation transformer (like the ones radio shack sells for about $20) that
is useful for getting rid of ground loops. In a fancy box. The input looks isolated
and the output ground is that of the entire box.