Eows 612 dual tone

[Traxstar1825]

So I was wondering and I think I heard someone say the eows 612 plays the two tones through separate horns on the siren to make dual tone? Is this true?

[JasonC]

No

[Tyler]

No

Are you sure? I’ve head the same thing before.

[DJ2226]

They do. All FS controls (SiraTone, MC, MCP, UV), the ASC CompuLert, and Whelen's ESC-864 and ESC-2030, albeit never utilized, have separate outputs on the boards to send the tones to different amps. It's the same with all of the European dual tone sirens as well as the Alertus HPSA's and I think the WAVES series from Eaton/Cooper. They output a high tone through half of the drivers in the siren and the low tone through the other half. The hons on the rotating EOWS sirens take two drivers, so it's possible to broadcast the two out of one horn. If you blast two tones out of one driver the clashing of the tones would stress them out causing the drivers to heat up and over time pop. I'm pretty sure the amps won't like it either.

[Tyler]

They do. All FS controls (SiraTone, MC, MCP, UV), the ASC CompuLert, and Whelen's ESC-864 and ESC-2030, albeit never utilized, have separate outputs on the boards to send the tones to different amps. It's the same with all of the European dual tone sirens as well as the Alertus HPSA's and I think the WAVES series from Eaton/Cooper. They output a high tone through half of the drivers in the siren and the low tone through the other half. The hons on the rotating EOWS sirens take two drivers, so it's possible to broadcast the two out of one horn. If you blast two tones out of one driver the clashing of the tones would stress them out causing the drivers to heat up and over time pop. I'm pretty sure the amps won't like it either.

That’s what I thought.

[Traxstar1825]

They do. All FS controls (SiraTone, MC, MCP, UV), the ASC CompuLert, and Whelen's ESC-864 and ESC-2030, albeit never utilized, have separate outputs on the boards to send the tones to different amps. It's the same with all of the European dual tone sirens as well as the Alertus HPSA's and I think the WAVES series from Eaton/Cooper. They output a high tone through half of the drivers in the siren and the low tone through the other half. The hons on the rotating EOWS sirens take two drivers, so it's possible to broadcast the two out of one horn. If you blast two tones out of one driver the clashing of the tones would stress them out causing the drivers to heat up and over time pop. I'm pretty sure the amps won't like it either.

That's what I thought as well. Do they just plug in each driver to do the burp tests heard on some test videos of the workers in the cabinets?

[4J25]

You are likely referencing some of the Hawaii acceptance testing videos, and to an extent you are right. AFAIK they are just powering each driver or set of drivers for each tone manually from the UV controller.

[Traxstar1825]

Ok, Cool, good way to check if each driver is functioning properly

[uncommonsense]

If you watch carefully on the Hawaii videos you see them testing each amp one by one by connecting and disconnecting them while the tone is running. What you hear is the drivers associated with that amp broadcasting the tone when that particular amp is connected. Which verifies also what's being said in this thread about how dual tone works on Federal controllers.

[Traxstar1825]

Cool!