Federal Signal’s Modulator High Powered Speaker Array offers the same proven technology as the original Modulator with the exception of a smaller compact chassis. Modulator provides a flat frequency response up to 2000Hz producing intense warning signals and digital voice messaging over a large area. The Modulator design enables the siren to produce a high sound level and intelligible voice communications.

The innovative omni-directional electronic Modulator speaker array consists of modules that utilize four 100 watt drivers. It also provides clear voice communication and offers warning signals which are produced by Federal Signal’s UltraVoice™ electronic controller and amplifier system. Custom tones and professionally recorded voice messages for the UltraVoice controller are available and can be purchased upon request.

The Modulator High Powered Speaker Array combined with the UltraVoice controller is ideal for community/municipal, industrial and military applications where immediate instruction is necessary. The MOD6032 and MOD6048 have been replaced by the MOD8032B, which is shorter, lighter and more compact.

The Modulator and UltraVoice controller can be networked via radio, IP, landline, cellular and/or satellite communications. Powering is available in AC, DC, or solar. The system typically operates from batteries which are charged from either AC or Solar. Federal Signal can also provide customized solutions to fit your special applications.


*The bottom module contains no active devices and is simply used as a reflective surface.
**Based on far field measurements
***Coverage based on 10 dB(C) distance doubled loss factor

Frequency Response 200-2000Hz ± 1dB
Color Off-white
Paint Type TGIC-polyester powder coat
Modulator Horn Type Hyperbolic flare
Modulator Horn Type 200-2000Hz1,200 ft
Horizontal Coverage 360º +/- 1 dB(C)28.000 in
Diameter 35"/88.9cm264 lb

Ordering Information

Model Types
Model Description UPC
MOD1004B Electronic Speaker Array, One Module 782979701309
MOD2008B Electronic Speaker Array, Two Modules 782979701316
MOD3012B Electronic Speaker Array, Three Modules 782979701323
MOD4016B Electronic Speaker Array, Four Modules 782979701330
MOD5020B Electronic Speaker Array, Five Modules 782979701347
MOD6024B Electronic Speaker Array, Six Modules 782979701354
MOD8032B Electronic Speaker Arry, Eight Modules 782979701378
Replacement Parts
Description Part Number UPC
Driver, 100 watt K8570063A