Both are MM and the standard input 47k should be fine. What are you hearing? Maybe it simply isn't as good.
Have a look at this which covers some of this.
https://www.analogplanet.com/content/lehmann-audio-black-cube-se-ii-mmmc-phono-preamp-reviewed
Have a look at this which covers some of this.
https://www.analogplanet.com/content/lehmann-audio-black-cube-se-ii-mmmc-phono-preamp-reviewed