SE vs Balanced volume


With my tube amp, when I switch between RCA & XLR, the XLR is louder. With my SS amp, when I switch between RCA & XLR, the volume is the same. The specs for the SS amp state that the amp is fully balanced. Here’s a photo of the innards behind the RCA & XLR inputs of the SS amp. XLR is on the left, RCA on the right, the yellow wires go to the external toggle switch. Why the different results? Thx.
steakster
Not sure this is the best or necessarily right thread to post/ask this question, but in light of the "heavyweights" who have contributed thus far I'll ask herein and tread lightly :)

What is meant by "summing stages for single-ended output" in a case where there are two sets of RCA (SE) outputs? Thanks.
What is meant by "summing stages for single-ended output" Thanks.
This is usually, a proper fully balanced circuit, and then an opamp/circuit is needed to sum both +- make it SE, in this case the xrl/balanced should sound better as the SE has the extra opamp/circuit in the signal path.

But in the OP’s case it seems to be the other way around, to which he still hasn’t given any model or manufacturer name so we can put this to bed.

Cheers George
steakster

Still waiting, what is the name and model of this amp so we can put this to bed.

Cheers  George