The EMG EXB is the bass expander version of the EXG. Might be worth thinking about as a future addition. You could do something similar with active bass, middle and treble controls by cutting the mids a bit and boosting the bass and treble, but this does it all at once and with one knob. It’s like having two sets of pickups to chose from to my ears (with the EXG modified version sounding much better). I find that midway is a better setting than full on, which can be a bit too scooped.
While looking at their EXB and other EQs I came across a page of wiring diagrams https://www.emgpickups.com/info/emg-...-diagrams.html One of them is for two pickups, each with their own volume and tone. That's what I'll do.