@brbrock I got the Spatial Pre and Mono's. In itself I couldn't say the Ravin is the cat's PJ's as I'm thrilled with the whole system/room the Raven pre is the heart of.
I was able to compare the Spatial suite to 1.) a Lumin Amp w/ Lumin X1 and 2,) a Roger's KWM-88 MK2 Integrated Amplifier with the Lumin X1 and also a Grimm MU1/Weiss 501. Speakers are K horns and REL subs. Power is treated and ethernet is all cleaned up (After rack shows up, will update systems).
The Spatial suite using the Grimm MU1 is the best of the three. It's more musical and there's no listening fatigue. Nothing wrong with the others. May let Lumin stuff go but not the Rodgers.
(After warm up) I can turn up the volume and with nothing playing standing a half and inch away from a speaker I can't hear anything,
The Ravin is tops. If your speakers are efficient enough the Raven Pre and Blackbird Monos are synergistic masterpieces. There's a waiting list for a reason. I got more than I paid for. Happy camper!