I tried throwing the Bryston 4B3 amp in to the system again today, doing some back and forth between it powering the Thiels and my CJ tube amp. I keep thinking "I’ll put it in and just live with it for a while."
But when I put on familiar tracks - e.g. Talk Talk’s Happiness Is Easy - I can’t help be taken aback by the difference.
"Where is that roundness, fullness, 3 dimensionality of the images?"
By 3 dimensionality I don’t mean that with the Bryston the Thiels don’t image/soundstage. They certainly do, with precisely placed voices and instruments. But the voices and instruments themselves sound flattened dimensionally and tonally. More like the way "3D" images look on those old viewmasters - a series of flatt images placed in 3D relief. That’s an exaggeration, but essentially the nature of the difference I perceive.
I put back in the CJ, and everything sounds bigger, more filled out, the drum kick and snare sound rich, with a present texture, the drum-set now seems more 3 dimensional like I’m peering in to the studio, voice sounds organic, acoustic guitars have that similar golden sparkle I hear from my own guitar, etc.
And with the Bryston, string/keyboard parts that usually float organically and 3D sound thinner, flatter, more icy in tone and texture.
Interestingly, this is exactly the character I perceived when my friend switched from his tube set up to the Bryston, at his house. Ever since then I’ve found a slightly off-putting coldness/hardness/icy quality to the sound - things sound clear but nothing sounds organic and real. (Though I never tell him this! I know not to excite audiophilia nervosa!)
Anyway, none of that is to say the Bryston is objectively worse than the CJ tube amps. The Bryston also brings some excellent qualities. Just not the ones I tend to value first.