...A mic placed close to the source (As it would be live) is far from flat...It may be the perfect coloring. Or it may be coloring you dont want and cant undo.
But see, there it is again. The presumption that a flat sound is the correct tone. The assumption that the resultant tone from a DI is by definition superior. Maybe the bass sounds like crap, unless it's being colored by external items. Maybe you plain and simply don't like the tone of a bass straight to DI.
Why is it necessarily the case that the tone from a DI is better? What is so special about THAT tone? It will almost always have more absolute low end than a mic, likelier to be boomy. It will almost always have less midrange complexity than a cabinet. Why is it the most popular bass rigs of all time color the sound....a LOT? Flat is almost never a desired goal for electric instruments. Incalculable time and effort has been put forth for decades to sculpt and create tones for electric instruments, and color them.
But all of this is bad when it comes to bass. It must be pure and uncolored, or it's a hassle. Why is it only with bass that a soundman is granted license to
create your tone rather than reproduce it?
Even with acoustic bass, if a player insisted on being mic'ed, it's acceptable. After all, that's his tone, his signature. Somehow, it'll be dealt with, though it may not be easy. There will be all the issues of micing and low end, etc. But it can be dealt with.
Do the exact same thing with electronics or speakers with an electric bass, and it's suddenly bad. It won't work in the house, it's too boomy, it doesn't sound the same out front, etc...and of course this is true for acoustic bass as well. But if a soundman has no choice, he will be forced to make it work, and (the good ones) will do the best to
reproduce the tone the player has worked so hard to create.
Somehow with electric, your efforts are to be undone and your results are automatically detrimental. None of the arguments presented are unique to bass (though it is admittedly a tough nut to crack), yet it is only this instrument that the standard practice is to undo any alteration at all to the signal from the jack.
Assuming you subscribe to this philosophy, why isn't a soundman allowed to tell you where to put your pickup blend? Or plucking hand? Or tone knob? Or what kind of strings to use?
Of course that seems silly, and it is. But each of those would present the same type of problems and issues that going straight to DI I supposed to address. Yet in spite of this fact, you will never hear a soundman bring any of those up. Why not?
Somehow, at the jack...THAT is where the sound is
done, like it's an acoustic instrument or something.
But it isn't, and shouldn't be treated as such.