I just purchased their "Purple" fuse for my REGA Aethos. It made a noticeable improvement. You All can debate whatever you want. I've been doing this for over 50 years.
Lawrence From MI
Synergistic Research Master Fuse £565
Only saw this yesterday that Synergistic Research make a Master Fuse that costs £565. That's a heck of a lot of money for a fuse, and I am sure there are those that can afford them will purchase without hesitation.