Vigier Guitars

I have a Vigier Arpege IV 5string bass.
There are 6 tone controles, 3 per pickup, bass/mid/high.
Manual says the boost/cut by 15db each. Ok.

QUESTION is there any information around about the respective center frequencies and whether they are shelf/band type?

Many thanks in advance!

Well, that the Preferred one: fretless bass with six strings
please PM me with any offerings
thx
Marc