What type of breakers are best for audio

Breakers are inferior to fuses, both protection-wise & sound-wise. I've tried some different fuses on my dedicated line & found that a glass fuse sounded brighter/harsher than a ceramic fuse, which was noticably better.
This was an interesting experience because of the way it happened. We had storms in the area one day, so the audio rig was shut down as a precaution. I was downstairs & decided to try a different fuse, because I had read about it here. So I changed it & then forgot about it.
The next morning weather was clear, so I fired up the rig just playing the tuner. I thought things sounded warmer / more mellow, but just went about my Saturday's work outside. Coming in & out of the house I kept hearing the improvement & wondering what had happened (I had forgotten about the fuse change)? Even my wife was asking about the improvement later that day, so then I got to thinking & finally remembered the new fuse. So we played some CD's & there was no doubt once we began critical listening & the rig was warmed up again.
Regarding your electrical panel Clark, I suggest adding an outboard FUSEbox alongside your house breaker box & run the audio circuits from that point.

You don't go thru the mains breakers at all. You stub directly off the mains lugs with large (#8 or #6) stranded wire to your good ole' fuse panel located right next door. Since I'm 'fanatic' I burnished all contacts with crocus cloth, including the fuse itself, all wire connections, etc. then followed up with Kontact.
Now I wonder if anyone has tried a plastic fuse? Ceramic was recommended here & is definitely better sounding than glass. But I've since seen plastic-housed fuses & wondered about them sonically? Anyone?

Steve that sounds like you have ceramic there. That gray-ish stuff looks like a stone surface. Glass housings are obvious of course. The plastic ones I saw were kinda shiny surfaced (you know that plastic sheen).
Kath: "double-deaf testing" ROFLMAO. Appears that we're like-minded in that respect.

Although I have no experience to share regarding the opposite phases question, it has been recommended here by those whose opinons I respect & who definitely are more knowledgable than I am in that regard.