Got this headset with my Yamaha piano bundle.
At first, when connecting it to the piano and trying to make some sound, I thought it wasn't working. "Huh? I have the headset connected, but it sounds like the piano is still using its own speakers instead?"
There was a slight moment of funny confusion, as another test with the headset worn only on one ear proved that the soidn was in fact coming from the headset.
My point? The sound produced sounded so good, that both my wife and I got tricked into thinking it was cjng from the piano. Was a nice surprise :)