I don't own a QKore system, but I did hear an impressive demonstration at a dealership. The dealer's system was dead quiet prior to addition of the QKore, so the improvement was not merely from the removal of audible noise (I heard what you heard) as well as an improvement in soundstaging (soloist seem to float more freely in space). I was more impressed with the improvement than I've heard from other system treatments, such as power conditioners.
Unfortunately for me, my power amp does not have an extra input to connect it to the QKore, and the Nordost representative said that one cannot connect chassis ground instead. That is why I did not purchase the system.
Unfortunately for me, my power amp does not have an extra input to connect it to the QKore, and the Nordost representative said that one cannot connect chassis ground instead. That is why I did not purchase the system.