I too, have a pair of A9s. They don't seem to be all that "bright" like some people would just love to say they are. Any brightness is coming from the amplifiers I have them connected to. Unlike a few members here (and everywhere else), I can't afford a $5k setup, so I made do with a 2x Adcom GFA-555 MkII setup, vertically bi-amping each A9 speaker (Amp A has Speaker L; Bass Array on left channel, Mid/High Array on right channel; Amp B mirrors Amp A for the right speaker).
These particular speakers just scream bi-amp, which actually decreases the overall brightness. The brightness coming from the A9s, natively that is, is due to the fact that these speakers are power hungry. When using an amplifier, especially those chintzy ones in the <$2k AVRs, the mid/high array gets more sound out of it than the bass array does due to there just not being enough juice to feed these rabid hyenas.
My first setup after my Yamaha HTR-5860 AVR just couldn't get these guys to sing worth a damn was a single GFA-555 MkII. That markedly improved the bass output while keeping the mids/highs in good shape. Then I was let on to what bi-amping can do to improve the sound stage. And so I have them arranged as above. Note: I know I don't have an electronic XO with the internal XOs disabled in the speakers - for simplicity's sake I left the speakers un-modified because as they're wired, their crossovers work very well, and appear correctly to the amplifiers as 8 ohm loads even in bi-amp mode (I figured once the buss bar was removed the single 8 ohm full array would become two 16 ohm arrays, but that is not the case here).
No, these guys aren't overly bright. If they are, then you're not giving them the power they need and the bass is starving while the mids/highs thrive.
Edit: The added benefit of the vertical bi-amp setup is that there is no crosstalk between channels now. They're truly separated. That was more noticeable than anything else.