Hi, I have the same question, 24v sirens are hard to find, or either very loud like fire alarms. I myself am wondering if an external 12v supply can be used to power a 12v siren, and if bridging the input IO to the power supplies negative will be possible. However I'm not sure, just wondering.
@@theonlydavide yes but i believe even if you have a 24v siren you still have to use a regulator or else for a 12v siren use a step down transformer / regulator witch centurion does not have any stock of
