I own a 512 and yes it is a re badged Bryston 9B. The only thing to watch out for is after a few years the RCA connectors will start blowing fuses in the amp. The only thing you can do is send in each amp channel to Bryston and pay 200$ to get better connectors installed on each amp channel. I have owned my amp for 5 years now and have had to have every channel repaired.
Since Bryston does not honor the 20 year warranty for the Lexicon models you have to pay out of pocket.
Since Bryston does not honor the 20 year warranty for the Lexicon models you have to pay out of pocket.