The Rumbler®, traffic clearing system demonstrates the long-standing commitment of Federal Signal to continue as the technological leader in an audible warning and operator safety.  

Improves Traffic Warning Effectiveness
The Rumbler introduces a revolutionary new concept to audible warning through its ability to interact with most 100/200 W siren amplifiers and provide secondary, low-frequency duplicate tones. Low-frequency tones have the distinct advantage of penetrating solid materials allowing vehicle operators and nearby pedestrians to FEEL the sound waves.

 Secondary System with Built-in Safety

The Rumbler system senses the primary siren tone signal and reduces the signals"™ frequency by 75%. It then amplifies the sound through a pair of high-output woofers. The system"™s timer allows the tone to sound for eight seconds, provides a highly effective warning, and automatically shuts off. The Rumbler is particularly effective when used in dense urban environments with heavy vehicle and pedestrian traffic.  

A complete Rumbler traffic clearing system consists of an amplifier, with built-in timer and two subwoofers. Vehicle specific mounting hardware is ordered separately. This system can be paired with most 100/200 W emergency siren amplifiers. 

Compatible Federal Signal Siren Models 
The Following Federal Signal siren models are compatible with the Rumbler System when used with a Federal Signal speaker(s).

• PA300
• MS4000 
• Pathfinder
• PA4000
• E-Q2B-200/EQ2B-100*
• AS-422 (VAMA)
• SSP3000

*Note: EQ2B(Legacy) amplifiers are not compatible.

Pathfinder Integrated Rumbler Capability

• Pathfinder + (1) 100 W siren speaker = single-tone, standard PA 
• Pathfinder + (2) 100 W siren speaker = dual-tone, standard PA 
• Pathfinder + (1) 100 W speaker + (1) or (2) Rumbler woofers = single tone, Rumbler, Enhanced PA 
• Pathfinder + (2) 100 W siren speakers + RUMBLER-3 (includes two woofers) = Rumbler, dual-tone siren, standard PA (one channel will Rumble)
• Pathfinder + (1) or (2) Rumbler woofers + (2) 100 W siren speakers + MS4000 = dual-tone, Rumbler, Enhanced PA