WTT two great cards for Hifiman HM-801 in pristine condtion.
You won't find any better amps for the player unless you go custom-mod route.
These amp cards are only compatible with Hifiman HM-801 player.
Balanced card has normal 3,5mm headphone out as well as balanced 3,5mm out (meant for stuff like RE262, RE272, RE600, HE-500, etc.).
Balanced 3,5mm out works fine with normal headphones as well.
So you can connect your non-balanced headphones to normal or...