My understanding of the various methods of "balanced" output would be two identical, redundant complete circuits to achieve the balance, transformer coupled output, or some kind of op amp to invert the circuit at the output. Of the three, maybe the "truly balanced" duplicated circuit might be the "best", but transformer coupling would be next best, and least best would be some kind of add on signal inversion.
For people who like the sound of transformer outputs, that would make the transformer balanced solution, if you MUST have balanced inputs and outputs, the most pragmatic, as well.
I went all balanced once. Another one of those "long run, short slide" scenarios, and since then, I could give a rat's ass about the so called virtues of balanced circuits in audio. You may double the signal voltage, but the cable runs just aren't long enough to justify the ostensible "noise reduction" advantages over the cumbersome additional circuitry, especially if you employ some kind of op amp inversion to get the balanced output.
For people who like the sound of transformer outputs, that would make the transformer balanced solution, if you MUST have balanced inputs and outputs, the most pragmatic, as well.
I went all balanced once. Another one of those "long run, short slide" scenarios, and since then, I could give a rat's ass about the so called virtues of balanced circuits in audio. You may double the signal voltage, but the cable runs just aren't long enough to justify the ostensible "noise reduction" advantages over the cumbersome additional circuitry, especially if you employ some kind of op amp inversion to get the balanced output.