Ok so I've been playing passive basses for years now and only just decided to get an active instrument (Ibanez BTB 605).

Problem is I can't find a good tone for playing classic soul. There's too many variables. Should I dial up a good tone on the amp leaving the eq flat on the bass and use the bass eq to tweak for different songs, should i leave the amp flat and do it all from the instrument?

Any advice is welcome thanks.
Gear: Fretless 1974 Jazz/Precision hybrid
Ibanez BTB 605
Fender Rumble 100