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Federal Signal Rumbler-3 Siren Intersection Clearing System

  • 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
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, providing a highly effective warning, and then 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.


  • Input Voltage: 9 VDC to 15 VDC
  • Input Current: 12 Amps max
  • Polarity: Negative grounded systems only
  • Standby Current: 0 mA nominal
  • Operating Temperature Range: -30°C to + 65°C
  • Frequency Ranges: 182 to 400 Hz
  • Output Voltage: 64 VDC (nominal) peak-to-peak
  • Output Power: 80 Watts
  • Physical Dimensions - Amplifier: 1.3 in H (3.49 cm) X 6.3 in L (15.57 cm) X 5.7 in D (14.48 cm)
  • Physical Dimensions - Woofers: 8.5 in H (21.6 cm) x 7.25 in (18.4 cm) Diameter (Each)
  • Ship Weight: 19.0 lbs (8.62 kg)