FWIW: I've had a SR Black fuse in my Class A solid state amp for 3 months. Much tweaking during that time - directionality, IC & PC swapping, preamp tube-rolling, etc. In my amp, the Black fuse seemed to reduce midrange harmonics - especially pronounced with vocals - thinner. Perhaps, the manufacturer voiced this amp with the OEM fuse.
Then, I tried the SR Black fuse in the power supply for my digital re-clocker. Voila! It works there. This sort of makes sense since many members installed their Blacks in their digital players first. No doubt, ymmv.
Then, I tried the SR Black fuse in the power supply for my digital re-clocker. Voila! It works there. This sort of makes sense since many members installed their Blacks in their digital players first. No doubt, ymmv.

