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I wish I could say that I have, but....I did start them on my XPA-3, they started to sound a tad bit bright, edgy even. When I upgraded to the XPA-2, they smoothed right out.
I have two pair of A9's, my mains are on the XPA-2 and the wides are on the XPA-3. I've had my second pair for a few days now and they sound great, my front stage is pretty powerful.