I just had an opportunity to really put my CFB through the paces in a very acoustic setting. I was on an 11 day tour with a group that plays nuevo tango, and we performed in listening spaces, with nice pianos, and no sound reinforcement.
I'm of the mindset, "The minute you plug something in, all bets are off, and you EQ and shape the amplified sound as needed." The Chadwick amplifies very nicely, IMO. I tweak a few things, and I can get my sound pretty easily in most spaces. That said, playing without amplification, I was really impressed with the sound of the CFB on some recordings we took from the audience perspective.
My CFB sounds soft/quiet and dark from the player's perspective in comparison to my carved bass. However, thirty feet out front, the bass puts some serious air into a room-- far more than I would have thought. Granted, all of the other musicians are very musical and sensitive, but it was nice to know that the CFB can definitely hold its own in an acoustic chamber setting.