Pass XP12. Tame, Anemic?

Hi,
just got a Pass xp 12 pre and it seems very “tame” “un-dynamic” it’s very nice and transparent but rather bland and doesn’t seem “alive” kind of “sleepy@.  I also expected more and tighter bass than my 6h30 tube pre.  I have on a trial and awaiting a LTA mz3 next week to compare.  Anybody experience this? Is the xp22 noticeably more dynamic? I’m pariing with Pass xa25 and Klipsh Cornwalls.  I never would have thought I had to worry about the Cornwalls sounding too tame. 
Thanks for any perspective