In article , Graham Holloway
wrote:
[snip]


When I worked for ILP Electronics many years ago, they suggested the use
of a fuse in series with the loudspeaker as protection against a DC
fault. I found that distortion was significant due to the modulation of
the fuse resistance by low frequencies. I have no records of the tests I
did. However, I did suggest an alternative, and that was to put a fuse
in each (+ and -) supply rails. It was possible to use fuses of a lower
rating than that in the output line because of the lower (half cycles)
duty.

Yes. I ended up also deciding that the best place for fuses is in the power
rails rather than the o/p.

Slainte,

Jim

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