Michael Fremer has posted a review of the AudioQuest Niagara 7000 Low-Z Power Noise-Dissipation System ($7995) at Stereophile. His conclusions:
“The AudioQuest Niagara 7000 and Shunyata Research’s Hydra Triton v2 and Hydra Typhon are all outstanding power conditioners, well designed by people who know what they’re doing. Both brands substantially improved the sound of my system without limiting its dynamic range—something not all power conditioners of my experience have managed.”
You can read the full review here.
