thanks. will look into it, need to use my myriad preamp non balanced for a setup with a complete set b&o active speakers using balanced input....might go for wireless, ReCreate | Bang & Olufsen.... not sure yet
The best "enginerical" way is to use any of the fully-differential amplifiers (FDA). This will provide you with a couple of benefits, but will demand to have a supply.
Having a proper source, without dramatical rise of THD at comparatively low load, you can use datasheet connection of THS4131 like first attached, while badly designed sources could demand for high-input impedance instrumentation amplifier to be placed instead of the FDA like last attached.
I can't believe how many threads are on this topic and how they continue to include misinformation all the time. Balanced and Differential
"Balanced signaling is two conductors (with an optional shield) that have equal impedance to ground.
Differential signaling is two conductors (with an optional shield) transmitting the same signal at opposite polarity."