Pass Labs XP 30 VS Ayre KXR Pre

hi Peterayer, thanks for the great insight in comparing KX-R and XP-30. would you able to give more detail account of these two great preamps? e.g which is more airy? more transparent and less compress during orchestral climax, meaning that they can separate instruments in complex passage. if XP-30 sound warmer than KXR, does the slight emphasis on warmth sometimes cause music in higher octave sound "blocked" behind thick curtains? do both preamp have similar soundstage width & depth or noticeable differences? i have ordered Simaudio 750D which i like very well and hope XP-30 would complement well, do you concur ? thanks for your input. -phil

hi Peterayer, Thanks for your detail effort in describing their differences & yes, your definition on airy, transparency is spot on. i would bear in mind the gears associated in your comments.
750D is CDP which i ordered, huge open soundstage, slight laidback presentation, not the in your room,in your face type, so it's good for grand orchestra & some rock\pop music\concert if recorded well. i have not decide on any pre/power yet but i already got ML electrostatics.
coming back to your opinions specifically for Higher FR on openness,airyness of both pre, your ending statement said the difference are really small, do both preamp differ on higher FR by about 5%-8% or easily noticeable by large margin say around 18% or more? anyone with untrain ear would simply notice that difference? my local dealer have no intention to bring XP30 for demo citing XP20 should suffix! So i can only lean on forums for help. thank you and certainly appreciate any input from you. regards