In article , Pooh Bear
wrote:
Fleetie wrote:



What happens to the voltage at the speaker output then? And could it
toast the speaker?

Sounds well dangerous to me.

Far more reliable is to fit 'crowbar protection' on the output to guard
against excessive DC. Whatever else - the speaker won't see prolonged
DC. Supply rail fuses will blow.

I avoided using 'protection' circuits as I always had the feeling that:

1) They would fire when not needed, thus either blowing fuses or
interfering with the music when it wasn't warranted.

2) They could also go wrong, and took design effort and cost away from the
actual amp.

However I agree that by avoiding them, the designer takes a risk. Swings
and roundabouts. :-)

Slainte,

Jim

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