Whelen Mechanical Siren Tones - X-Ecutor, "Q", "M", and More

In the early 2000s Whelen came out with the X-Ecutor Mechanical Siren Simulator which was a full system. Around the same time they launched their line of Alpha and 295 sirens with a "Q" designation. These sirens had a simulated mechanical tone that was not quite the X-Ecutor, but more high pitched than their modern mechanical tone. Within a few years the X-Ecutor was discontinued and the "Q" tone changed to "M", altering the pitch. It is thought Federal Signal didn't take kindly to the use of "Q" in the name and the pitch of the tone. Modern programmable Whelen sirens have a mechanical tone as well, but it is slightly different than the "Q" or the "M". In this video all the variants are demonstrated with a variety of devices.