I played the Nathan East signature bass for a while and I believe the NE-1 circuit is built in there as well (?).
You basically got this one knob where you can sweep through while playing in the mix and you'll find this one setting where it gets just right. That bass was not mine, I borrowed it from a friend who was under the impression that it has a piezo pickup in the bridge and that knob controlled that and I treated it that way, but it always felt like you turn up that knob until it gets better and then you find that sweet spot where it's bang on and if you turn any further it gets worse again.
You basically got this one knob where you can sweep through while playing in the mix and you'll find this one setting where it gets just right. That bass was not mine, I borrowed it from a friend who was under the impression that it has a piezo pickup in the bridge and that knob controlled that and I treated it that way, but it always felt like you turn up that knob until it gets better and then you find that sweet spot where it's bang on and if you turn any further it gets worse again.