Balanced power can be a good thing, unless the equipment manufacturer connected the neutral leg of AC to ground. With normal utility power that’s not a problem, but with balanced?
unless the equipment manufacturer connected the neutral leg of AC to ground.
For electrical safety and electrical safety standards the current carrying neutral conductor is never connected to the chassis of equipment. That has been the standard for at least the last 60 years.
Prior to around the early 1950s and earlier some, maybe many, manufactures of audio equipment did connect one line of the mains, of the 2 wire cord and non polarized plug connected equipment, to the metal chassis of the equipment. Usually the metal chassis was enclosed in a wood or plastic case/enclosure and the knobs were made of plastic or Bakelite non conductive materials. The user was protected from coming into contact with the metal chassis. Depending how the plug was plugged into the electrical wall outlet there was a 50/50 chance the chassis was HOT with respect ground.
.