My wife would not listen to her music (rock) when we first met when I had Martin Logan Monolith IIIs and Quests. No bass, no dynamics, poor listening area. I was driving them with Audio Research Classic 60s and an AR SP14. Maybe it wasn't sufficient power. Enter the Focuses and Sig IIIs. No problem for 18 years with more powerful tube amps and higher end tube gear for the last 15 years.
2017-I install my friend's latest cables, the SR blue fuse and TC without changing the room treatments. My wife finds the Focuses sound to bright and aggressive. Reason-the openess exposed the bad slap echo and other acoustic problems in my room. 2018-Solution-SR HFTs (2 sets), SR speaker kits (1 pair) and removable of all baffles, diffusers, other hard surfaces in the room. Result-she likes listening to her music again.
Enter the SR Atmosphere XL4. Placed in front of the speakers, tremendous increase in dynamics, detail and tone intensity. She really likes it when dialing in Amplify setting for heavy metal and hard rock. For me, it sounds like horn speakers dynamically, panel speakers for detail and triode amplification for tone depth. So far, so good. These are repeatable results.
As to the TC, fuse and cable changes, my wife noticed the difference immediately and I didn't tell what I did. The other acoustical tweaks she could see. I didn't tell her what the differences were, just asked her what do you hear, do you like it or not. She is not an audiophile. It didn't require 10 blind tests to get an answer.