I don't know anything about the Core Audio TECHNOLOGY Kolossus grounding station, but this is a different company from Core Audio DESIGNS that makes the audio racks and accoustic treatments that you mention. Although it can be confusing.
Core Audio Technology Kolossus Grounding
......has anybody bought this product ???? Does it actually work as I do have a ground loop problem that I have been trying to clear and was just wondering if this product does what it states that it can do. Isn't this the company that also made audio racks and stands ???? This site if this the same company does not speak very highly of this operation.....your thoughts