Here's a monthly test of the last EOWS 1212 on O'ahu! This siren is located on the east side of O'ahu at He'eia neighborhood park, in my hometown city of Kaneohe. It was upgraded with an UltraVoice many years ago, and is set to dual tone. This particular unit has a very dominant low tone (850hz). It still bears it's original civil defense yellow paint scheme, and retained it's original solar panel from the SiraTone controls! The old radio antennas are no longer used, all Hawai'i sirens now use satellite/cellular activation. A fully up to date map of all sirens on O'ahu is available at oahusirens.com
Wow! Love the classic sira-tone controls, nice video too.
It was upgraded with an UltraVoice many years ago, and is set to dual tone
Re: Federal Signal EOWS 1212 - 1 minute alert
Posted: Tue Dec 13, 2022 11:02 pm
by german_siren
i love how it scares the birds
Re: Federal Signal EOWS 1212 - 1 minute alert
Posted: Wed Dec 14, 2022 5:02 am
by Tyler
It's low tone dominant because only 4 of the speakers is running the high tone and the other 8 are running the low tone. The UltraVoice can't spread out the tone because of it's design. Each amp is mono 400W. The SiraTone amps were mono 200W, allowing an even 3/3 split.
It's low tone dominant because only 4 of the speakers is running the high tone and the other 8 are running the low tone. The UltraVoice can't spread out the tone because of it's design. Each amp is mono 400W. The SiraTone amps were mono 200W, allowing an even 3/3 split.
Mahalo for the info Tyler, this definitely explains the low tone's dominance! Now you have me thinking, if the UltraVoice is only capable of producing a single tone over each 400W amp, does that mean a siren such as the MOD3012 would have a dominant low/high tone? Functionally, it seems to me that a modulator 3012 would have 12 100W drivers, similar to the 1212's driver configuration, resulting in a high/low tone having dominance over the other.
It's low tone dominant because only 4 of the speakers is running the high tone and the other 8 are running the low tone. The UltraVoice can't spread out the tone because of it's design. Each amp is mono 400W. The SiraTone amps were mono 200W, allowing an even 3/3 split.
Mahalo for the info Tyler, this definitely explains the low tone's dominance! Now you have me thinking, if the UltraVoice is only capable of producing a single tone over each 400W amp, does that mean a siren such as the MOD3012 would have a dominant low/high tone? Functionally, it seems to me that a modulator 3012 would have 12 100W drivers, similar to the 1212's driver configuration, resulting in a high/low tone having dominance over the other.
That is correct. Only the even number celled Modulators will have an even split of Tone A and B. The only exception to this is the 3024 and the 6032.