Anyone auditioned Pass Labs XP-30 preamp?

hi has anyone compared XP-30 with JF Corus? i know of there is a price gap between them but it's not that big. just would like to know their sonic difference, if which one is more relax & sweeter, the leading edge attack and high's extension, which has more air around the notes etc.. thanks

hi Audiozen, your emphasis on feed forward tech is noted here. could you describe more about sound character of P-30 or Hegel's "house sound"? i heard Amphion Argon speakers before so it's easy for me to relate your experiences.
If compare to ayre KX-R preamp, would P-30 be similar? as you had mentioned full, controlled & organic with 3D space, i assume it has more air and good at presenting complex orchestra passage without compressing musical notes, that would certainly come with excellent transparency right? higher octave is smooth without harshness, attack & transient of highs also have clean leading edge without roughness. is that the benefits of feed forward? i'm getting interested, thanks

Hi Mkwglyg,
If you don't mind me asking, what are the brands of both preamps you are refering to? Thanks
-phil