Is Plinius 9200 bright sounding?

I owned the 9200 and it was not bright in my system. I will not say however that it cannot be. The highs had a shimmer and slight sparkle which was good, but that was in my setup. For you it could be a bit different. I have only heard of one person (here in these forums) complain about the highs of the 9200. Everyone else has been complimentary. Your amp-speaker match and source play a role in what you ultimately hear but in and of itself I would not characterize the 9200 as bright.

no it isn't. dead neutral top to bottom

I used a Plinius P-8 amp for a while driving Shahinian Hawks in a well-damped 2000 cubic foot room. The P-8 is the amp section of the 8200 and is, according to the distributor, virtually identicalto what they are now using tin the 9200. I listen mostly to large scale Euro-classical orchestral stuff. The P-8, and the SA-100MkIII I now have, both seem to expose wll the brightness present on your source material. Mellow cd's and lp's can sound beautifully full and powerful. But, anything less than smooth on top will sound almost (to me) unbearably bright, especially on violins and trumpets. I noticed this the very first time I hooked up the P-8 and still notice it, to my chagrin, with the more expensive and sophisticated SA100. If you have speakers that are trelatively flat on top, this could be a problem. It could be that the Plinius is a very accurate reproducer and you get out what you put in. It could also be that the Plinius is best matched with speakers that are a bit rolled off in the treble.
Otherwise, these struck me as very fine amps.

I currently own the 9200 and love it. IMO, excellent amp. I agree with jaybo, dead netural top to bottom. Also, a very nice phono stage.