What Lynn said is very audible. Both the Raven preamp and Blackbird amps use this approach to power supply and balanced circuits. Once you start listening to circuits built and powered this way it is very hard to go back to conventional approaches because they sound just a bit cloudy or muddy. It is like a veil being lifted. The constant merry go round of trying different coupling caps and other things to color the sound in a way you prefer comes to an end. Instead, once you understand what is going on, you spend a year or two eliminating every bottleneck you can so that the circuit can perform at its best. What becomes evident is that the circuit and the approach are incredibly transparent. If you change anything that supports it, you hear it instantly. Cloud, the main tech at Spatial made the same comment. You can instantly hear any subtle change you make. The type of wire becomes very noticeable. Tube choices are very audible. Of course you hear these things with other more conventional gear, but not to the extent you do with this circuit and power supply architecture.
Obviously, there are lots of very nice preamps and amps in the world that sound very good. I used to make some of them myself. But they don't sound like this. When you eliminate a lot of the "grunge" that you didn't even know was there, you get a very spacious and airy sound, with incredible detail that you have never quite experienced before. That is what I hear, and most others who have heard it have made similar comments. It is not so much about what the circuit sounds like, but rather what the music sounds like when you eliminate a lot of the coloration and distortion that you were never really aware of. For example, we touched on the idea that there is very subtle spatial information in the signal that is partially obscured by other circuits. These things are hard to measure, but they can certainly be heard.
I understand that two more preamps have just shipped, so we should get some more reports from owners here fairly soon. I know it is hard for people because you cannot just go to a dealer and hear the gear, and there are only a few of these in the world, and most are prototype versions. The production versions are entering the market now, so when people post, the rest of you will get a better impression of how the preamp sounds in a variety of systems to a variety of ears.