Where has been your most effective placement for an aftermarket fuse?


Not looking for a debate with anybody on whether aftermarket fuses work or not, this thread is for those fortunate members with the hearing to know that they do indeed work.
I am very interested in your thoughts and opinions as to where they work the best, the biggest bang for your buck if you like.
For myself I am going to say it is in my Metrum Onyx DAC.
And not just my present DAC, all of my last 3 DAC,s showed a very nice easily audible improvement with an aftermarket fuse.
Next I would say is in my Gold Note phono stage and lastly in my BAT integrated amp.

So what or where would you say has been the most noticeable piece of equipment that has benefited from a fuse change in your system?
128x128uberwaltz
I put a Blue in an integrated Amp. Thought I heard a difference. But did I? 
If you like to tweak, then why not. Can’t hurt. It’s all part of the fun as we scout around to make improvement$.
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Interesting Steakster
I too have spent a fair few dollars on cleaning up the power on a few fronts and not sure as I would say the fuses have taken away from any of that but.....
They were all in place before I cleaned up the power and I have not tried anytime since without them in place.

Maybe a task for when I am truly bored.......
Here you’ll find 36pages, 900 Littlefuse even colored ones Black, Blues, Oranges maybe even Green as well that look like they could be un-badged $160 boutique fuses. All for a fraction of the price.

Then for fun select other manufacturers at the top and press "show results" and see theirs, also for a fraction of the price.
https://au.element14.com/c/circuit-protection/fuses-fuse-accessories/fuses/cartridge-fuses?brand=littelfuse

Cheers George