It appears the amplifier i’m using has two 7A fuses accessible from the outside, and 5 or 6 lower amperage fuses on a PCB in the amps power supply.
In a potential sound-enhancing compromise, I can replace 5-6 lower amperage fuses with solid copper cylinder shaped objects, and leave the two 7A as is...for safety...
...but actually perhaps swapping the 7A fuses also, for some aliexpress "Fever-grade" fuses that make extravagant promises.