aktiv setup sound to bright

Hi
Few weeks ago I upgraded my linn system in to aktiv
I run now sneaky ds (as a streamer and pre) > 2 X aktiv lk140 > keilidh
The sound is very Detailed ,the stage is grate but it's too bright, I feel like I lost the midrange Especially on the vocal area (to much treble).
I tried to use the trimmer on the back of the treble amp (on the aktiv card) but it didn't change much.
Changing the speakers position didn't change it either.
Is there any Suggestion what should I do?
Will another preamp change it?
Thanks
Or