Hello Frank
It's in the schematic put it's not all that easy to read. Its a 3.3 in series with the driver with a .040mh and a 17.8uf in parralel. Look at V2 and R17, L2 and C10.
Do you have any measurement capability at all?? I am using my measurements, it sure would be nice if you could actually confirm what curve you are actually getting from your drivers. Even an RTA would help feel kinda blind on this end.
Rob