What are "true" balanced connectors

@erik_squires 

 Each signal is actually referrenced to ground,

Not universally true.

 
I should have said referenced to -signal- ground. That is the balance point that both signals share in common. 

Sleepwalker:

Balanced signals used to be transmitted by transformer outputs and inputs which were galvanically isolated.

Best,
E

Balanced means that the + and - amplitudes of the signal are referenced equally to ground.

Balanced means that the + and - amplitudes of the signal are referenced equally to ground. 

Not a requirement when using transformers which are not center tapped, as was the case for many decades. In the old days, you'd use a single amplifier output, to drive one side of a transformer, and the resulting output had no reference to ground, only to each other.

It is only in modern times that we can use multiple op amp stages as the sender and receiver. And still, the receiver does not rely on any ground reference.

Best,
E

@luynes
You don’t have a clue as to what the ’balanced’ spec is.  This is evident in your original post.
I just pointed you to a person who has experience with Balanced Topology. 
That you find that unacceptable is your problem.
And, if you wanted to know if the amp was truly balanced, why not contact the manufacturer directly, instead of soliciting guesses from those that don't even own the unit?
B