Wheelock STH-4R-ELSTC-F four-horn sounder delivers maximum acoustic coverage for large industrial and commercial facilities. Quad-horn configuration projects 105dB+ output across expansive spaces, cutting through machinery noise and ambient sound. Rugged construction withstands harsh warehouse, factory, and outdoor environments. Synchronized strobe compatibility ensures coordinated visual and audible alerts.

Selectable tone patterns accommodate different alarm scenarios and facility protocols. Heavy-duty mounting brackets provide secure installation on walls, poles, or structural elements. UL-listed for emergency notification compliance. Engineered for facilities where comprehensive sound distribution is critical to life safety.

Specifications:

Features:

• Compliant with ADA, OSHA 1910.165, ANSI 117.1, NFPA 72, NFPA 101, and IFC
• Cluster and strobe wiring can be monitored for integrity by the control panel
• High-Efficiency unit for fire life safety and/or general communication announcing/notification
• Provides for high-intelligibility voice reproduction and highintensity visual alerting for emergency life safety applications, alarm and protective signaling
• Only 1-pair of wires needed for audio connections