Counterpoint:
The signal coming from your bass isn't flat. Not even close. Then pedals, even set true frequency flat, impart tonal nuances. So does the amp, even set frequency flat, as does the cab. And then the room makes a right mess of your sound.
So even with everything under your control (pedals, amp, cab) set frequency flat, you're still not sending a flat frequency signal.
It's about knowing what speaks where and being able to control it.
I'm not gonna put a Pbass that speaks very clearly in the 100-250Hz area into an amp that has a massive scoop in that region.
Nor am i gonna play a Ken Smith with brand new steel roundwounds through an oldschool 2x15 cab that can't replicate anything above 1kHz.
End of the day, i want my basses to sound like my basses, and i don't want my effects or amp or cab to get in the way, except in a way that i desire and can control.
I don't disagree with what you state here as my own process and POV is similar ~ EG. if I want the true sound of my bass than I don't insert anything that adversely affects or colors the result, nor do I demand that they be transparent [what is the point of that anyway?]. But I do choose any and everything in the signal path to contribute to the end result. As I have learned for many tone gurus everything in a signal path contributes to the resulting sound, it's never just one thing.Agree 100% with your post. Small counterpoint here but aligned with the rest of your post:
End of the day I want my (modern) bass into (modern amp) to be sculpted into a specific sound. Using your example above, I need to know the characteristics of my signal chain and how to dial in or out certain frequencies if I wish to attempt to sculpt a Ken smith bass into modern class d amp and 15" cab into a vintage P with flats into a 60s B15.
We have so many gadgets and toner sweeteners that there a temptation to stack them all up but at some point there has to be a diminishing return, sort of like making of a sandwich ~ some times the more complex the better but other times nothing is better than a great grilled cheese or PB & J.
