Sat Jul 31, 2021 7:18 pm
The Federal Signal 2001 was introduced to the market in 1989 in the 'roundback' variant. These models had a rounded back panel, the windscreen, and were considered 2001-DCs, or the 1st Generation of 2001-SRNs.
Around 1992-1993, the second variant was introduced - the squareback 2001-DC or SRN-G2. This one also featured a windscreen, but had a square rear panel. This design would be used until the introduction of the 2001-130 in 2006. This variant underwent a few changes, including a change in the size of the center cone in the siren's horn.
The last version of the 2001-DC or SRN-G2 removed the windscreen and made common the large center cone. These were still considered part of the G2 or DC line, and were not what we know and love as the true 2001-SRN.
The 2001-SRN-G3 was introduced around 1998, and featured a logo placed on the center cone. This also was the first 2001 series siren without the 2001-DC model stamp. These are easily identified by their logo on the center cone, and the 2001-SRN sticker on the rotator panel, although both of these stickers, or decals, have faded over time or were removed or painted over.
In 2002, a change was made to the rotator assembly of the 2001 series, prompting a new design for the rotator cover. This was a square rotator instead of the rectangular one introduced with the original 2001 in 1989, marking the first major change for the series. This was known as the SRN series B, or simply the 2001-SRNB. The head was nearly identical to the 2001-DC and SRN. The first generation of 2001-SRNBs featured the smaller logo from the 2001-SRN series, however in Mid-2004, this was swapped for a larger cone logo with the "FS" logo.
In 2006, the 2001 series underwent its most major overhaul. The internals of the siren were moved around, prompting a larger rear panel, in a rectangular shape. The rotator stayed the same from the 2001-SRNB series. This model could output more sound than the previous 3 models, giving it the name of 2001-130. This is the most popular variant of the 2001, with over 5,000 units currently in service around the world.
There's also another siren that's considered part of the 2001 series, however this one features a different chopper assembly, this one being 8-port instead of the standard 12-port. This is the Federal Signal Equinox. There are no visible differences between the Equinox and the 2001-130 aside from the decals on the rotator panel, and, of course, the sound.
-Nik VW
3.6 roentgen - Not Great, not terrible.