On Sun, 26 Feb 2017 03:39:55 -0500, micky
wrote:

Thanks for the reply pf, but I'm still interested in the questions.


Years ago, I was told not to play my stereo with no speakers, for fear
of somethun' or other. Of course that was 1968, a good year for audio.

Is this still an issue with current electronics, like audio amplifiers
and burglar alarm amplifiers?


So if I take the fuse out of the circuit to the sirens, but the siren
driver is still functioning, do I risk burning it out? Even if it's
like this for say, 20 hours? Or can it go like this with no harm to
itself?

(These 3 questions are still important regardless of whether I
disconnect the siren driver from the control board.)

But.. what if I disconnect the siren driver from the control panel
(which I did)? They're separate boards. Do I risk burning out the
output of the alarm control panel, if say it is run. again, 20 hours?
Or can it go like this with no harm to itself?

That was only ever a problem with tube (valve) designs. No load could
cause the output voltage to rise enough to damage some components. I
am not aware of any modern equipment with similar restrictions. When
transistor outputs arrives to replace tubes, that was one of the big
advantages. You didn't want to short the outputs, but having them
open was no problem at all.