Which SR Blue or black Fuse

For each fuse the odds are 50% of putting it in the right way. The odds of putting more than one fuse in simultaneously the right way is less than 50%. With two fuses, one fuse should be evaluated first. When you decide which way is best, then evaluate the second fuse. Otherwise, it can get too complicated. Even worse for three or more fuses. If a little unsure about the first fuse direction when listening take a guess then move to second fuse. Repeat. It should more obvious the second time around.

Thanks @geoffkait  @mental 

Fuses, fuse holders and the additional wiring ( or circuit board traces ), impair the sq, but, for the protection of the piece of equipment, it is there. One comment I always appreciated was by Bill Lowe of AQ.    " To Due Less Harm ". Better fuses ! Enjoy! MrD.

Remove all the screws from your gear, and replace them with titanium versions. Your gear will sound that same, but it will be slightly lighter, possibly resulting in the .0000023% sonic improvement attributed to fuse direction. I did say "possibly" but sonic enhancement from a fuse is mythological at best, and expensive at worst.