Alembics are, IMO, in sound class all their own.
My Series I has the Rickenbacker like stereo out feature (both pups have their own discrete output). I send those to my Alembic F2B preamp (2 channel Fender Showman inspired design, IIRC).
The Series I and Series II are active electronics.
I'm a big Stanley Clark fan and that is what prompted me to seek out my Alembic bass. I paid $700 along with Rickenbacker for it in 1977.
Eve in my roughest financial times (and I've had a couple) I've never even given a thought to selling my Alembic. My son will inherit it along with all my other basses and guitars when I leave this life.