Honeywell has introduced its Silent Knight® low frequency sounders and sounder bases, plus an amplifier to provide code-mandated backup power capabilities for emergency communication systems. To satisfy specifiers’ demand for more secure fire and emergency voice communications, the company claims a unique amplifier has been developed by the Silent Knight team to provide backup power capabilities for the IntelliKnight 5820XL-EVS emergency voice system.

The new line of low frequency notification solutions includes SpectrAlert® Advance low frequency sounders and sounder bases. The sounders and sounder bases are designed by System Sensor to emit a 520 Hz tone, which studies have found more effective at waking building occupants, including those with mild to severe hearing loss. The expanded line includes speakers and speaker/strobes, as well as sounder bases compatible with Silent Knight smoke, heat, and fire/carbon monoxide (CO) detectors.

These notification appliances provide the low frequency output to meet current NFPA 72 standards and International Building/Fire Code. Existing installations of current Silent Knight detectors and traditional sounder bases can be easily upgraded by replacing the base with the new low frequency version. In applications where speakers are being used for low frequency notification, the IntelliKnight 5820XL-EVS has also been updated to emit the 520 Hz tone.

The new EVS-100W can deliver 50 watts of power to the 5820XL-EVS, plus 50 watts of back-up power. For more audio power, the Silent Knight EVS-100WBU can be used for 100 watts of power with 50 watts for back-up