the urge to make a siren was high today

Requires tone generator mod

AG1 to activate siren

i know this is going to get 0.5 upvotes, but since the SP2 demo is almost over i am sure that some people already switched back to SP1. i am kinda running out of siren ideas so if you can request a siren i'd appreciate.

"550 DON'T DO THA-"
- Model 2, TSRP 3

The 500 series was introduced in 1953 and advertised as a midrange alternative to the Thunderbolt siren released the year prior, which was Federal's flagship and most powerful siren at the time. The 500 could output significant noise without a blower, which made it more attractive to buyers who wanted a lower-cost, lower-maintenance alternative.

There were three models introduced in 1953: The 500-SH, which was available in 8 or 12-port single tone, the 500-SHTT, which came in 9/12 port dual tone using an SD-10's rotor and stator (and sometimes also referred to as the 500T), and the 500-DHTT, which is covered below. 8-port 500-SH models used an 18-inch rotor from the Type 7, while the 12-port models use the 20.5-inch rotor from the STH-10.

Early 500 series sirens came with short, wide motor covers, and short wide projector horns that were at a steeper angle than later generations. These horns appear to be the lower halves of an SD-10 repurposed into a horn. Some of these early 500 sirens came with six reinforcing struts attaching the horn to the stator, which would stabilize and reinforce the horn as they were prone to warping. Most of these reinforced units are 500-SH models, with few 500-SHTT units having these reinforcements. The earliest 500 units used cone-shaped intakes and had only five reinforcement struts.

Many examples of early 500-SHTTs can be found around Los Angeles, CA, as part of its decommissioned civil defense system. 500-SH and 500-SHTT sirens both came with 10 hp dual-sided motors, in 1 ph (208 V) or 3 ph (220 V/550 V, similar to CLM sirens) AC power.