What are fuses used for?

rockass,

You catch on pretty quick...I would start with remote control. Please report back which button on your remote control now allows you to hear the subtle nuances (previously inaudible) with Rock, Blues and Jazz music 😉

For best performance listen to the fuse one way, and then reverse the other way to determine best sonic orientation.

Thats a tough one ill try to figure it out get back to you asap.

It is also possible if you have newer gear there maybe NO "user" accessible fuse to change.
There has been a trend to just solder a fuse internally on a board.

Obviously not something you can just switch out quickly and easily.

Some even more enlightened manufacturers have abandoned fuses altogether in favour of circuit breakers.

I think I’m going to be a flatearther on this one.
It seems like too much trouble.

rvpiano,

I appreciate your candidness and respect the decision.