SECUTRON (MRI-4003-LF) 4000 Series Low Frequency Sounder Base

SECUTRON MRI-4003-LF 4000 Series Low Frequency Sounder Base

The SECUTRON MRI-4003-LF represents a critical component in comprehensive fire alarm notification systems, engineered specifically for professional installers and facilities management professionals requiring reliable, low-frequency audible signaling. Designed for seamless integration with addressable fire alarm panels, this sounder base provides robust acoustic notification in challenging commercial and institutional environments where precise emergency communication is paramount.

Engineered with advanced acoustic engineering, the MRI-4003-LF delivers consistent, penetrating low-frequency sound output that meets rigorous life safety standards. Its sophisticated design allows for direct mounting into standard fire alarm bases, enabling efficient retrofit and new installation scenarios across diverse architectural configurations including office complexes, healthcare facilities, educational institutions, and industrial processing environments.

Key Features

• Compliant with NFPA 72 notification appliance requirements and UL 464 standards for audible signaling devices
• Low-frequency sound profile optimized for improved sound transmission through walls and enclosed spaces
• Compatible with most addressable fire alarm control panels in the 4000 Series ecosystem
• Robust, corrosion-resistant construction supporting extended operational reliability
• Field-programmable sound output and cadence configurations
• Enhanced electrical surge and transient protection for mission-critical notification performance

Technical Specifications

• Operating Voltage: 24VDC nominal
• Typical Current Draw: 50mA @ 24VDC
• Sound Output: 85-95 dBA at 10 feet
• Frequency Range: 520-620 Hz
• Operating Temperature: 32°F to 120°F
• Mounting: Standard 4″ electrical box compatibility

Professional fire alarm technicians will appreciate the MRI-4003-LF’s precision engineering, which supports critical communication protocols in high-stakes notification scenarios. Whether integrated into HVAC shutdown systems, elevator recall mechanisms, or comprehensive building-wide alarm networks, this sounder base delivers dependable performance where every second and every decibel matters.

For more information, contact the Life Safety Consultants team at (888) 557-0558, or email us at: sales@lifesafetycom.com