BigTee,
Please don't confuse voltage with current. In order to drive your amplifiers to drive your speakers current must flow. The same thing happens in your AC line analogy. The cable shield issue that you are raising is real. Current will flow through the shield if the circuit driver and receiver are at a different reference potential.
Regards,
John
Please don't confuse voltage with current. In order to drive your amplifiers to drive your speakers current must flow. The same thing happens in your AC line analogy. The cable shield issue that you are raising is real. Current will flow through the shield if the circuit driver and receiver are at a different reference potential.
Regards,
John