I can't post a URL here, but you can find information about this device on the Theoretica Web site.
Robert Harley, John Atkinson, & .other celebrity reviewers (Andrew Quint in TAS as recently as last January) have given this box high praise. Apparently, it's some sort of DSP that allegedly creates a breathtaking holographic 3D soundstage from two-channel content.
Yes, virtual surround processors have been around since, jeez, at least the 1990s, but this one purports to be a truly high-end device, including an audiophile-grade (whatever that means) DAC, 31-band equalizer, binaural recording capabilities, & ADC. But for 25 grand, I'd expect it to also clean your records & wash your socks.
I'm kinda skeptical at this point, but better ears than mine have heaped high praise indeed. Has anybody here actually heard a unit work on their own systems with familiar 2-channel content?