Aftermarket fuse to tame a bright system?

I think that's fair comment @audphile1 

What is interesting though is that interconnects seem to be the most important piece of the chain, silver in this position provides an upwards tilt to the frequency response - silver in other positions seems to have less effect (just more transparency).  What has surprised me though is that power cables can really change the frequency response as well (let's ignore silver or copper issue at this point), with some power cables providing more open and extended treble.

Anyway, I have concluded that an aftermarket fuse may well change the sound, it might help - but fundamentally it's the interconnect which needs to be switched out because the upwards tilt I have with this silver interconnect will likely always remain and I'd end up trying to over/incorrectly compensate for it elsewhere.  Some good suggestions on alternative interconnects given here and I will likely try an aftermarket fuse at some point, but I think I need to sort out the fundamentals first. 

@gavin1977 well yeah if you send garbage into the amp nothing will stop it from passing it on to the speakers. If the amp is transparent enough that is.

Power cables make a difference for sure. Driving factors are gauge, quality of conductor material, different dielectric, different lengths, connector material and plating, shielding…all make a difference to various degree and that depends on how good the power supply design is in the component. Power cables will also act as filters to reject noise going into the power supply and into the ac line.
The fuse on the other hand is a 1” long safety device with a hair thin piece of wire that melts when the amperage criteria is exceeded. Unless the caps are made out of 24k gold connected with unicorn pubes, the difference in sound quality this device can make is negligible at best and will never offset the shortcomings in a signal chain. I tried fuses long time ago and learned my lesson.
When it comes to power cords and signal cables I use the best I can afford.

Good luck!

@audphile1 

Paul McGowan On Audiophile Fuses

Paul of PS Audio describes his astonishment at what a difference audiophile fuses made in his system. His first experience was a blind test during which he didn't even know what the tweak was. We also learn that PS Audio has been using such fuses in some of its equipment since then.

audphile1

... The fuse on the other hand is a 1” long safety device with a hair thin piece of wire that melts when the amperage criteria is exceeded ... the difference in sound quality this device can make is negligible at best ...

That's interesting that you think a fuse is such a trivial thing, but breaking in Furutech GTX-D NCF outlets causes an "absolutely psychotic rollercoaster that lasts over 300hrs." What do you think accounts for the difference?

@bolong I don’t doubt Paul heard a difference with an expensive fuse. I heard it too when I tried it in my amp about 15 years ago.

So I don’t doubt that fuses make a difference. The point I was trying to make in my earlier response is that no fuse change is capable of offsetting faults in a signal path that were introduced by cables or tubes. Or components.