Yes, just about all valuable electronic gear will have a fuse to protect themselves against overcurrent conditions. There are exceptions, however. My Bricasti M1 DAC did away with its fuses earlier this year and Bricasti instead replaced them with a wire harness that resulted in improved SQ. I purchased that upgrade and heard the improvement for myself. Instead of a fuse, my Audience aR6 line conditioner uses a circuit breaker similar to your panel at home as they felt it to be superior. Otherwise, all my gear have fuses. Fuses are felt to degrade SQ but unless you're willing to break the law and subject yourself to fire hazard, they are a necessary evil for most gear. The best that a fuse can do is be invisible and the best fuses come close to achieving this transparency although there are some fuses that seem to target a specific coloration that allows them to be used as a tuning aid. I cannot consider myself a fuse expert as I've only tried a few, specifically the SR20 and Synergistic Red, and they do make a difference. I settled on the Synergistic Red for the TotalDac and have been quite pleased although the improvement over the SR20, already a very good fuse, wasn't night and day. t have not tried the Audio Magic Beeswax fuse but I know of their reputation. The biggest difference thus far for me has been grounding with an Entreq box, bigger than any power cable, IC or fuse upgrade I've tried. Grounding the signal seems to absolve many sins.