Ken Micallef has posted a review of the Unison Research Unico Primo integrated amplifier ($2400) at Stereophile. His conclusions:
“The Primo wowed me with its ability to ally impact with resolution, and visceral dynamics with graceful detail and musicality. That it failed to resolve the deepest low-end notes with equal gumption in no way detracted from its overall appeal. Rather, the Primo delighted with its cohesive strengths, and so achieved a kind of holistic presence.”
You can read the full review here.