You will need a power amp with the F-1X or F-2B (or the power stage of a bass head).
The F-1X is a great preamp, has one channel, a crossover, FX send/return, and DI out, the F-2B does not have these features.
The F-2B is also a great preamp and has two channels. You can use the stereo output from your SII to send each pickup to their own channel on the F-2B for separate EQ, and either send each channel to their own speaker cab (through a two channel power amp) or combine the two channels for a post EQ mono out. You can also jumper the two channels together if you want. There are probably other ways to use it as well.
Congratulations and have fun with your new bass and which ever setup you end up with. Keep in mind that an Alembic Series II will sound good through anything 😊
…and then there is the new FL-105 Superfilter Pedal 😎🎶🎶