Well, the truth is different driver materials add coloration or overtones to that 5000 Hz because they resonate. Manufacturers try to get away from this by trying different materials, techniques, and surrounds to damp this out. In instruments, it’s what makes a violin that plays the same note as a piano sound like a violin and a piano sound like a piano. Same goes for mid woofers, where different cone materials add coloration and overtones to the sound they produce. When you hear someone describe a speaker as sounding warm or dry, what they mean is those overtones added to the mix make it sound this way.
I know you are aware of this, so don’t take it as an insult, it’s more for anyone who might be watching and not know.