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What are "true" balanced connectors

Hello All,

I am considering buying an Odyssey Stratos amplifier. I noticed it is described as having XLR (bridged) inputs

My very limited knowledge of balanced circuits is telling me this is not a "true" balanced configuration...

Am I right on this?

Any help will be much appreciated

Jim
luynes
sleepwalker65's avatar
sleepwalker65
832 posts
 
@erik_squires 


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

Best,
E


Galvanic isolation isn’t a requirement for a balanced circuit. The transformer output, unless it is center tapped, is only differential, which is where the value is anyways as far as common mode noise rejection is concerned. 

erik_squires
16,006 posts
 
Galvanic isolation isn’t a requirement for a balanced circuit.

True.


The transformer output, unless it is center tapped, is only differential, which is where the value is anyways as far as common mode noise rejection is concerned.

Yes, but it proves my point: The + and - are not necessarily referenced to ground. This is something which has just come about because we now use inverting op amps to drive the (-).
lewm
12,840 posts
 
The plus and minus halves of the signal can float with respect to ground.  Or not.
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