i want to wire my old car alarm speaker to a PA system, would this work?
it is common. Disconcerting yet usual. automobile batteries are able to delivering a severe modern-day (as much as 100A) even at 12V, it is why you notice a spark - the electrostatic capability is sufficient to triumph over the small hollow because of the fact the relationship nears the terminals. At finished capability, your battery might have the capacity to delivering 120W!
Not without modification at least. The car alarm speakers I have seen have the electronics that generate and amplify the sound integral to them. Also, they likely won't do so well for voice frequencies.
