McIntosh fuse changeout to make better sound

My issue with a lot of the tweaks, like designer fuses, is that the prices being charged are often absurd based upon actual production costs, and the dubious (at best claims) which which rarely include any actual evidence of efficacy. Kind of like most nutritional supplements-- where if there is any hard science,  it virtually never supports the claims being made-- and as the studies pile up-- calls most of them into question. Again, placebo effects are very real, even though it's just a sugar pill.

Some of you are way overdue for a reality check.

Nightingales have no song of their own to sing, they only mimic the ones they heard.
I only listen to those who know; how the weave, got wove.

@robberjobberman  My three blue SR fuses make a very significant upgrade over standard buss fuses in my custom tube amps and highly modified Dynaco ST70.  However, they apparently make no difference in some equipment, including an EAR 864 preamp.  Same with the power outlets.  SR blue (black and red as well) outlets are superior to my former Hubbell hospital grade outlets.  SR says it's the 2 million volts they subject these products to and graphene coating.  I don't know but the proof is in the pudding.  Wonderfully enhanced listening.  I've given back two of SRs more expensive products as doing harm rather than good.  However, I rely on SR's HFTs (32 in my main listening room) for acoustical treatment along with Hallographs and acoustic paneling.

I just putt an AMR. fuse in my Ultimate 70 Van Alstine two days ago. 
This was after I had put two into the tube preamp, I had it connected to. It also helped soundstage and tone. I have not gone beyond the 15 buck per fuse level. I can tell you I have been using them in sources also, for a couple years now.