Manley Jumbo Shrimp upgrade

Fuses are not part of the active, tone producing circuits in any amp, and are simply designed to allow current to pass through them and fail immediately if necessary to save the circuits from frying. Although SR fuses have a cult following with astonishing claims of transforming the tone quality of amps, I've tested these (SR Black) and found these claims to be nonsense, even while providing the weeks of break-in (!). In fact, after my little comparison to the Littlefuse (and other generally stock fuses) products I've used for years, I discovered an SR Black had been left in my amp for months, which I replaced with the original  Littlefuse with zero change in tone. Try asking anybody how these little graphene enhanced seriously overpriced tiny wire devices actually work (magically coat the electrons with Special Sauce?) and prepare for scorn. The SR business model seems to be "money paid equals results experienced" even when the products are laughably unnecessary.

Fuse directionality in AC circuits is technically irrelevant, and perceived changes in sound from reversing a fuse are likely imagined. Some think changing the direction meant you cleaned the fuse contacts and are hearing the results of that, but if the fuse worked before being reversed that's also very unlikely, although cleaning any contacts is generally a good idea. Like washing your hands after meeting a politician.

The "positive results" mentioned have been somewhat skewed by the relentless commercial promotion of SR fuses by a few very motivated posters, who by themselves make up a large percentage of the "testimony" in the primary SR fuse thread. When I posted the simple question asking if anybody had a reasonable explanation of why these fuses work (the Athletic Supporters of SR stuff seemed likely to know the answer), it became clear there was simply nobody who has a clue about why Quantum Tunnelling or Graphene dust in a fuse would make any difference. My tests showed it doesn't, but then I didn't pay anything for my test samples.