I have a 3B-ST, 3B-SST,3B-SST/2 and a 2B LP.
My thoughts on the model?
I don't know how it compares to the more powerful models. Like I heard Werd's 14B-SST2 but didn't know what to attribute to the amp, BDA-1 and his pre-amp at the time.
I read somewhere IIRC that the 3B was regarded as Brystons best sounding amp or was that the 2B LP.
There are distinct differences that I can discern between the ST, SST, SST/2. But the Bryston sound, albeit neutral is characteristic of all the models.
For my needs the 3B-ST was under-powered for my Paradigm Studio 100 v2 at the spl that I typically listen. With an easier to drive speaker the 3B power would be sufficient power at normal spl listening.
As someone already mentioned for a few hundred dollars more I could have purchased the 4B-SST. My thinking at the time was to match as close as possible amps for my multi-channel HT. And I was concerned about the power draw for everything using only one outlet. If I had asked my brother, a diesel electrician. I would have known how many amps I was using and probably have purchased the 4B.