Technology partner: V3360 Cooper Notification (Wheelock)
SKU STH-4MR-3360
The Wheelock Series Cluster Speakers are designed for ceiling or wall mounting for high ambient noise environments. The Cluster Speakers are available in multiple configurations. A speaker/visual (Series STH-MSR) and speaker only (Series STH-R or STH-G) alerting system. All alerting systems are equipped with UL listed STH-15SR or STH-15S supervised horn loudspeakers and the speaker/visual system has a UL listed DC-MAX-C strobe, mounted to a steel enclosure.
Non Standard Product-10 Days Lead Time


  • Cluster Speaker systems come fully assembled.
  • High efficiency unit for life safety and/or general communication announcing/notification
  • Provides high-intelligibility voice reproduction and available high intensity visual alerting for emergency alarm and protective signaling
  • Speakers and Strobes are prefabricated to a 10 x 10 x 6 steel enclosure for indoor use
  • Mounts to ceiling or wall
  • Only 1 pair of wires needed for audio connections.
  • Each individual STH-15SR or STH-15S horn is capable of delivering up to 102 dB at 15 watts at 10 feet
  • Omni-directional sound
  • Labor savings (both time and money)
  • Conduit knockouts for 1/2 or 3/4 coupling
  • Shipped in one box