Jeff Fritz reviews the Alpha A12 power distributor and Venom NR-V10 power cord in SoundStage! Ultra.
Here is an excerpt.
Speaking of dynamics — often, when a system’s delivery of power is suboptimal, noise can subdue dynamics. In this regard I found the performance of the Shunyata power-delivery system exemplary. Arabella Steinbacher’s recording of the Winter concerto of Vivaldi’s The Four Seasons, with Clemens Schuldt leading the Munich Chamber Orchestra (24/96 FLAC, PentaTone/Qobuz), exploded from a backdrop of near silence. This gave the music real life — that pop you hear from live music. The sound of Steinbacher’s violin was absolutely, pristinely clean at any volume I cared to play it. Not only did notes emerge from silence, they decayed back into silence naturally, with only the recording venue remaining audible to provide the sense of space around notes that gives them substance. In short, there was nothing in what I heard to jar me back into a different reality: the fact that I was sitting in my listening room at home, listening to a recording of music. In fact, I noted that the real limiting factor was my room — and my room’s acoustics are good.