Mr. Kuker told me that the pronunciation is "R-Rated"...
Speaker output with attenuator for going direct to cabinet, no additional amplifier needed. Has been a cool amp/texture for synths, reamping snare drums for outright destruction, etc.
Actually, I think we've used it more as an amp than as a line device.
I'm personally undecided as to whether I'd buy one with my own money...I have a guitar and microphone addiction to deal with. It's still a great piece of kit, unlike anything I've used, and there will certainly be people who want to pay for it.