Kora, I have no doubt that your Dynaudios may sound "better" compared to some unknown comparator, when fed from your balanced equipment, whatever it is you're using, but the speakers per se are not sensitive to the nature of the signal in terms of balanced vs SE. In other words, if you played around with amplifiers, phono stages, and line stages, you might eventually find some combination of SE electronics that sounds better than your current balanced set-up, although balanced circuits in my own experience do tend to have a lower noise floor. Also, unless your amplifiers have a balanced output, the speakers are not at all affected one way or the other by what is upstream (balanced or SE), except in the areas of noise and gain.
I think I may be opening a can of worms. Don't worry about it.
I think I may be opening a can of worms. Don't worry about it.