In all honesty and candor, I don't hear anybody's "tone" at most gigs, whether local or world famous players. No matter if a player plugs into just a tuner, or a miked rig with enough effects to make Wimbish feel intimidated, it almost always sounds the same. Boom, with almost no note definition. In the rare cases where there is a disernable tone thing happening, it's a player that uses minimal effects and has a musical touch and/or a command of the instrument that allows audibility through a mix. They let the PA do a lot of the work. That comes with practice, and can't really be bought.
I agree, and I think this is mostly due to the line array + sub configuration that you find in 98% of venues these days (vs. the larger Clair Bros. type enclosures of years past), as well as the tendency of a lot of FOH engineers to crank the subs just because they can, obliterating all of the midrange information where bass tone lives. It is possible to get a good bass sound that has attack, tone and definition through line arrays with subs (+ or - room acoustics), but FOH engineers have to work harder to get it and actually have to have a sense of what good bass tone is. Another problem is the horrible practice of making the kick drum the loudest thing in the mix, immediately wiping out any possibility of hearing actual bass tone.
I've been to the Coachella festival a couple of times, and it was a good study in hearing how different FOH engineers treated bass through the same system(s). Some automatically made it sound like that car that pulls up next to you at a stoplight blasting hip hop with a huge subwoofer in the trunk, even when that was totally inappropriate for the music (i.e. Jake Bugg). Most at least got the bass present and properly balanced in the mix but without much actual tone, and a couple actually got perfectly balanced, beautiful bass tone (the guy with Polica comes to mind).
The main thing, which inanimate_carb touches on, is that good tone has to be coming from the player's fingers (and instrument) first and foremost. If that's happening, the rest can be a lot easier. My mentor as far as how to play in large venues was Carmine Rojas, who exclusively played with a pick for a while because that guaranteed the bass would cut through better - not that I exclusively adopted that practice, but it was a good starting point.
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