The current being conducted by an AC mains fuse in a preamp (or other line-level component) will be essentially the same all the time, as long as the unit is powered up and not in a standby mode. Playing music will make no difference in any burn-in effects that may occur.
That would not be true, however, in the case of power amplifiers or integrated amplifiers that operate in class AB or class D, as those amplifiers draw AC currents that fluctuate widely as a function of the volume of the music.
Regards,
-- Al
That would not be true, however, in the case of power amplifiers or integrated amplifiers that operate in class AB or class D, as those amplifiers draw AC currents that fluctuate widely as a function of the volume of the music.
Regards,
-- Al