Equinox

Equinox
Company	Federal Signal Corporation
Produced	2011 2014-present (Under the 2001 series line)
Type	Electromechanical
Sound output	126 dBc at 100 feet
Frequency	500 Hz
Horsepower	6.5
Succeeded by	508

The Equinox is a rotating electromechanical siren produced by Federal Signal Corporation. It was initially a special order, essentially being a 2001-130 with an Eclipse rotor and stator. The use of the 2001-130's projector with a lower frequency sound hampered output, so it was redesigned into the 508, which uses a properly tuned projector to increase efficiency. These sirens can be difficult to visibly differentiate from the 2001-130 as they look nearly identical. The only difference in appearance is the "EQUINOX" sticker replacing "2001-130" on the rotator box. In 2014 this siren was brought back into production and was made part of the 2001 series of sirens selling right alongside the 2001-130.