Keep my comment short, since this is a thread about power cable, HFT affected sound stage, imaging, tone, definition, etc, generally in agreement with others’ review comments. I stated “affected”, not “improved”, on purpose, since you may not like the results if you use SR suggested default positions (they are a good starting point though), it took me some efforts to find optimal positions for those HFTs for achieving the effects I preferred. If you want to try HFT, I suggest to try at least 10, preferably 15. HFTs were the first things I purchased from SR, now I also have Atmosphere XL4, powercell 12 SE, blackbox, fuses, interconnects, speaker cables, and power cables, duplexes.