Modulator

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Revision as of 21:42, 14 December 2013 by Ziginox (talk | contribs) (→‎Models: Clarified the model number system)
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Modulator
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Company Federal Signal Corporation
Produced 1995-2013
Type Electronic
Sound output 106-125
Succeeded by Modulator II

The Modulator is an electronic siren produced by Federal Signal Corporation. It is the second 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