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