Modulator
| Modulator | |
[[File: |200px]]
| |
| Company | Federal Signal Corporation |
|---|---|
| Produced | 1995-2013 |
| Type | Electronic |
| Sound output | 106-125 |
| Succeeded by | Modulator II |
The Modulator was electronic siren produced by Federal Signal Corporation. It is the first generation in the Modulator series. It is comprised of cells that contain four 100 watt compression driver speakers a piece, with a "dummy" cell that is empty to help even out sound distribution. The siren works by sound being projected downward through an opening underneath each cell, it then bounces off the top of the cell underneath the opening and is projected outward. The "dummy" on the bottom does not contain any speakers, it is used to help even out the sound distribution from the last active cell in the stack.
Models
The model number refers to the number of active cells, minus the bottom dummy cell, and drivers, of which a cell can have up to four. The first digit refers to the number of active cells in the siren and the last two refer to the number of drivers. For instance, the MOD2008 has two active cells with four drivers each, making eight drivers, plus a dummy cell on the bottom.
| Model | Image | Output | Drivers | Notes |
|---|---|---|---|---|
| MOD1004 | 106 dBc | 4 | 4
| |
| MOD2008 | 112 dBc | 8 | ||
| MOD3012 | 115 dBc | 12 | ||
| MOD4016 | 118 dBc | 16 | ||
| MOD5020 | 120 dBc | 20 | ||
| MOD6024 | 121 dBc | 24 | ||
| MOD6032 | 123 dBc | 32 | ||
| MOD6048 | 125 dBc | 48 | ||