Q: What does Crossfeeding feature do?
A: Crossfeeding is the special technique which mixes some frequencies of Left and Right channels of stereo music together. Crossfeeding must be used with headphones only and its goal is to simulate stereo perception of external speakers. Explanation: All music is composed with condition that it will be listened through external speakers thus composer takes into account that some frequencies of Left and Right channels will be mixed in the air before arriving to the listener. If listener is using headphones then no such mixing in the air happens and thus desired perception of the music composition is not achieved. Crossfeeding technique simulates such mixing and thus listener is able to feel music as if it is heard from the external speakers, e.g. in the same way as music composer planned it to be heard. Neutron provides several presets with different degree of mixing. Choose whatever preset you like or adjust to your own taste.
But yes the soundstage issue is why I am not sure I like it. I think a lot of people like the wide soundstage headphones give, even if the separation between channels is more than intended/when listening to external speakers.
That's not what most people think, read this: