Rumbler® Low-Frequency Siren for Police Vehicles

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Rumbler® Low-Frequency Siren for Police Vehicles

  • Rumbler low frequencies deliver up to 10 dB more sound pressure inside civilian vehicles  near emergency vehicle—getting attention and clearing traffic more effectively than a standard siren tone
  • Low-frequency tones work simultaneously with primary siren
  • Produces penetrating/vibrating low-frequency sound waves
  • Interacts with most 100/200 W emergency vehicle siren amplifiers
  • Enabled via any emergency vehicle steering wheel horn ring
  • Eight-second safety timer provides automatic tone shutdown
  • Highly effective in dense urban environments with heavy vehicle traffic
  • Three-year warranty

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Rumbler Diagram

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).

*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


Audio Output Power 80 W
Input Voltage 9/15 Vdc
Nominal Output Voltage 64 V peak-to-peak
Standby Current 0.025 A
Operating Temp. -22˚ to +149˚ F (-30˚ to +65˚ C)
Polarity Negative ground only
Frequency Range 182 to 400 Hx


Physical Specifications Amplifier Rumbler Woofer
Length 5.7 in (14.48 cm)  
Width 6.3 in (15.57 cm)
Height 1.3 in (3.49 cm) 8.5 in (21.6 cm)
Diameter   7.25 in (18.4 cm) each


Ship Weight 19.0 lb (8.62 kg)
Audible Equipment may produce LOUD sounds necessary to request the right-of-way. Audible equipment may cause hearing damage. Wear hearing protection. Refer to the Installation Manual or call 800/433-9132 for further instructions.
Important Warning for Police Boats and Fire Rescue Boats
It has come to our attention that police boat and fire rescue boat sirens and speakers may subject persons operating those craft to sound pressure levels that can cause permanent hearing loss. We recommend that speakers be located as far forward on the boat as possible, as recommended in the SAE Recommended Practice J1849 "Emergency Vehicle Sirens". However, unprotected exposures of sufficient duration to properly located siren speakers can still create a risk of hearing loss.
It is our recommendation that your siren speakers should be relocated and persons operating these craft should wear hearing protection when using the siren system.
Failure to comply with these recommendations may result in temporary or permanent hearing loss to operators and passengers of these vehicles.

Ordering Info

Model Types
RUMBLER-3Siren Amp, Rumbler, secondary warning system, 12 VDC, low frequency tones, hardware kit, housing bands and cradles. Used with PF200 to utilize dual-tone and Rumbler capabilities
RBKIT1Single Rumbler Woofer for use with Pathfinder® siren
RBKIT2Dual Rumbler Woofer for use with Pathfinder siren
RB-SWRumbler actuation switch
RB-CHGR15Kit, pair of mount brackets with hardware for Dodge Charger police package vehicles, 2015-2023
RB-DUR19Kit, pair mount brackets with hardware. Dodge Durango (single bracket), 2019-2023
RB-SILHD20Bracket kit, Rumbler, 2020 Silverado HD, no-drill
RB-EXPD08Kit, pair of mount brackets with hardware for Ford Expedition, 2008-2021
RB-FPIU20Ford Police Interceptor Utility, 2020-2023
RB-ESC20Kit, pair mount brackets with hardware, Ford Escape, 2020-2022
RB-FRD15Kit, pair of mount brackets with hardware for Ford F-150, 2015-2022
RB-FHD08Kit, pair of mount brackets with hardware for FORD F-250/350/450, 2008-2021
RB-FRD15EKit, pair mount brackets with hardware, Ford E-350/450, 2008-2016, 2015-2022, Ford F-150, with Ecoboost
RB-FHD17Kit, pair of mount brackets with hardware for Ford F-250/350/450/550 vehicles, 2016-2022
RB-RAM16Kit, pair of mount brackets with hardware for Dodge Ram SSV, 2016-2021 and Dodge Ram Classic, 2019-2023
RB-GVAN11Kit, pair of mount brackets with hardware for Chevrolet Van, any bumper that has a flange on bottom, 2011-2019
RB-TAH21Kit, pair of mount brackets with hardware for CHEVROLET TAHOE, 2021-2022
Replacement Parts