Absolutely correct. I should have clarified. Most modern devices that run directly off 120VAC have a transformer and a rectifier bridge right on the mounting plate of the device (looking at you, System Sensor) and a few have it built in (so the physical horn and strobe components still actually use DC). I think Edwards still makes some version of the adaptahorn that runs on AC and I know System Sensor has a 120VAC bell as well. So that’s true, they definitely exist, however given their relative rarity I find it highly unlikely that our OP has somehow gotten their hands on one without knowing it.
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Part true. There are still things you can get new that require 120VAC, most of which are for general notification (this includes strobes).
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