Good questions and ideas, and unfortunately I’m under-qualified and under-equipped to look into them on my own. I forget why I even brought it to him, but for what it’s worth, my trusted tech didn’t report any problems when he had it for whatever I brought it to him to check or fix
As popular as these have become with doomsters, I figured they were all like yours, but I suppose anything will sound huge with enough dirt and speaker area.
I think I need to retract, or at least rethink, my “midrange-y” description. I think what I meant by that was that I hear some sort of … burp-y? character to the notes, regardless of how I set the onboard electronics. In any event, mine sounds much like
@LowEndLobster ’s does in the video, though it sounds like I have darker strings (extra long nickel-plated steel Stringjoy roundwounds, .130/.105/.080/.060, tuned BEAD) and/or less sizzle dialed in.
This sounds much like what I’m experiencing, so I suspect my electronics are probably fine after all, just not as burly and rude as I expected for some reason. I asked my guitarist to bring over his jazz bass this Thursday to compare output, since all my other basses apparently breathe fire

I haven’t found steel roundwounds I’ve liked, but I do have some Curt Mangan NPS rounds on the way, which I find brighter and more flexible than Stringjoys, so we’ll see how I like those.
Fortunately, I got my T-40 mostly to scratch my birth year and old Peavey itches, and if it sounds different from my go-to instruments (Yamaha BB734A and Ibanez ATK300), that’s not necessarily a bad thing.