The Sarzo bass does pretty much it’s own thing and does that well but I wouldn’t say that it’s the most versatile bass around.
It obviously owes a lot to the Aria SB-LTD, which Rudy Sarzo used, but that had Alembic Activator pickups - no filter type eq or anything though. According to RS, in an interview, he would have liked Peavey to use the same pickups but Hartley Peavey decided to do what he frequently did and use designs and hardware that he already had.
Hence the use of the Dynabass preamp.....
So, the pickups are basically T40 humbuckers, underwound to make them a bit more scooped and less mid-heavy and fitted in a different housing. They are genuine four wire pickups so that opens up a multitude of wiring options ( one or both coil tapped, one or both in series or parallel etc. etc. ).
I’ve only experimented with coil tapping one or both and found that the most useful was to have to ability to run the neck p/up coil tapped and blended with the bridge p/up - it opens the sound up a bit more.
I could easily do this because the active/passive switch was redundant as the Glock pre has a pull A/P switch on the volume control - also there’s a shed load of space in the control cavity without the big Dyna circuit board...
Whether RS himself ever had one with Alembic p/ups I don’t know - he certainly had a five string version that *did* have Alembics p/ups and, by the look of it, Alembic preamp too.
There’s a fretted version on a few tracks on the Whitesnake live in St Petersburg video (which looks to have the Dyna pre) and a lined fretless version in this photo which doesn’t and which is probably Alembic.
There, that’s bored the hell out of you.....