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Wheelock STH-15S loudspeakers

The Wheelock STH-15S supervised, horn loudspeakers provide superior intelligibility and dispersion to achieve maximum sound projection and penetration for indoor and outdoor life safety and mass notification applications.

The weather-resistant speakers are equipped with a compression driver with up to 15 watts RMS power handling capability. The horn loudspeakers include a built-in 25/70 V transformer, featuring a screwdriver adjustable, 7-position watt/impedance selection switch.

Wheelock STH-15S supervised horn loudspeaker left side view
Red or Gray
Power Rating
15 Watt continuous
101 dB @ 15 Watts @ 10 ft

Emergency Communications

Provides crisp, clear voice messages, ideal for emergency communications, mass notification and voice evacuation.

Weather resistant & wiring

  • Weather-resistant metal construction and reentrant acoustic path assure protection against water, humidity, vermin and corrosion.
  • Wiring terminals are protected with a vandal-resistant adapter cover for control equipment utilizing cable or conduit.


The mounting bracket allows directional sound dispersion via vertical and horizontal positioning. Provisions are also included for surface or strap mounting to pillars and I-beams.
Approvals & Compliance
How to buy from Eaton
Contact us

Customer Support


Phone: 1-800-631-2148, Option 2

Questions before you buy

Technical Support


Phone: 1-800-631-2148, Option 3

Fax: 941-487-2389