I use a Rogue, so I just have master volume, PU balance and a single Filter for both PUs (way easier than Series circuit) and I almost get all my tones just playing with balancing the PUs. Sometimes I disengage the ressonance gain at the filter (just a switch on Rogues) to get a more plain tone or control the click sound on Slap, sometimes I turn it on to push some frequency harder (usually those that enhance claritie, as between 800Hz to 2.5KHz, controled by the Filter).
I usually don't use the Filter fully open, because I fill that makes me sound too agressive for the context I play, but I like to explore how those mid frequencies (specially with the boost switch engaged) changes my Tone on different arrangments.
Combining that with the changes in PUs balance give all colors I need on my pallete. Nowadays I'm exploring the sound of using Neck PU soloed to get some kind of P-Bass tone with various Filter settings, from click bass fully open to dub sub-bass tone with filter almost fully closed.
I would suggest you to check first both PUs equally open and the boost on filters engaged. Start with Filters fully open and hear how it sounds when you disengage the boost. Then, with boost on, start playing with how your Bass sounds when turning the Filters down (anti-clockwise) each PU at a time. Check how the tone changes when you disengage them, time to time.
Don't rush it, it takes sometime to get used to the filters.
