I have taken the hifi tuning Supreme fuses and directly compared them in my system to the synergistic research fuses,they both are very good.
I have found the Hifituning fuses have great clarity and resolution without being bright, where the Synergistic fuses have very good balance but have more meat on them great presentation.this being the case .i went with what
I learned long ago,you want the absolute most resolution and detail going to your dac or cd player and preamp,that being said the Synergistic research fuses are a great match for the power amp .
The combination is excptional now.my ayon Skylla -2 dac preamp
Has 11 fuses and directional ,getting the layout from the company was a big plus.One thing needs to be mentioned .Ayon mentioned this to me
Steel fuses can vary more then 15 percent that is why if all possibly
I go up one size if possible from 500 ma to 650, 1A to 1.25. The 3.125
For he rectifier they even recommended to go to a 4A that is a big jump
For I cooked a 3.125 A fuse to the output tube on startup .i am sure others
Have encountered this.pretty expensive at over$50 bucks a pop.