Could put the BMP tone stack before U1.2 and up the gain of that stage to compensate, if necessary?If you add a BMP tone control at the end like the second schematic, you'll also need to add some sort of gain recovery stage.
indeed, that’s why I put the “if necessary”, that second stage with the 1M in the feedback loop should more than make up for a lossy tone stage I’d thinkEDIT: Is this circuit incredibly loud as-is? There's already a lot of gain here.
It looks like it’s basically a loud boost feeding an even louder boost, so I guess through experimentation you could decide where you prefer the EQ shaping to happen. The later in the circuit it happens the more dramatic an effect it’ll have, usually.It's very loud. I basically just stuck a BMP tone stack in there for example's sake. I'll have to mess around with different ones, but I wan't sure where to try inserting it.