EST Edwards SB4U Fire Alarm Low-frequency Sounder Base. This specialized mounting base integrates a high-performance audible alarm function directly into your fire safety infrastructure. - 520Hz low-frequency output - Compatible with Edwards signature series detectors - Integrated sounder circuitry - 24V DC operating voltage - UL listed for life-safety compliance

Unlike standard base stations that function solely as mounting points, the SB4U provides a critical layer of notification by emitting a low-frequency tone designed for optimal wakefulness. While older legacy systems often relied on high-frequency horns, this modern sounder base meets contemporary building codes that prioritize low-frequency signaling for improved occupant responsiveness.

Engineered Performance and Reliable Activation

The SB4U sounder base utilizes advanced signal processing to ensure reliable, synchronized alarms across your facility, minimizing the risk of signal interference commonly found in less sophisticated hardware. Its streamlined design simplifies the installation process for certified technicians, allowing for a seamless transition from basic sensor monitoring to a fully addressable, audible emergency notification system.