Federal Signal Rumbler Low-Frequency Traffic-Clearing Siren Systems

The Federal Signal Rumbler Low-Frequency Siren System provides enhanced audible warning performance for police, fire, and other emergency response vehicles. Designed to complement traditional electronic sirens, Rumbler produces deep, penetrating low-frequency tones that help alert motorists and pedestrians to approaching emergency vehicles, particularly in congested urban environments.

Advanced Low-Frequency Traffic-Clearing Technology

Rumbler works alongside a vehicle's primary siren by reducing the frequency of its warning tones by 75%, producing powerful low-frequency sound waves that can penetrate vehicle interiors and be physically felt by nearby motorists. This technology provides an additional layer of warning, helping attract attention in situations where conventional high-frequency siren tones may be less effective.

Federal Signal reports that Rumbler can deliver up to 10 dB more sound pressure inside nearby civilian vehicles, depending on vehicle type and distance. The system includes an automatic eight-second operating cycle to provide controlled warning activation.

Flexible Speaker Configurations

The Rumbler Series is available with a single Rumbler Solo speaker or compact speaker configurations designed for installations with limited mounting space. These options allow installers to select a suitable arrangement based on available vehicle clearance and mounting requirements.

Federal Signal Siren Integration

Rumbler speakers can operate directly with compatible Federal Signal sirens featuring integrated Rumbler traffic-clearing capability, eliminating the need for a separate Rumbler amplifier. Complete systems with a dedicated amplifier are also available for use with other supported siren systems.

Key Features

• Low-frequency traffic-clearing technology for enhanced audible warnings
• Operates alongside the vehicle's primary electronic siren
• Produces penetrating sound waves that can be heard and felt inside nearby vehicles
• Up to 10 dB additional sound pressure inside nearby civilian vehicles under applicable conditions
• Automatic eight-second warning cycle
• Available Rumbler Solo and Compact speaker configurations
• Compatible with select Federal Signal sirens featuring integrated Rumbler capability
• Dedicated amplifier configurations available for additional siren compatibility
• Vehicle-specific mounting brackets available separately
• Three-year manufacturer warranty

Speaker quantity, amplifier requirements, and included components vary by configuration. Rumbler speakers must be connected to a compatible integrated Rumbler system or dedicated Rumbler amplifier and should not be connected directly to an ordinary siren output. Verify compatibility and mounting requirements before purchasing.