Description
The Wheelock STH-15S-ULC supervised horn loudspeakers are equipped with a compression driver providing up to 15 watts RMS power handling capability, superior intelligibility and dispersion to achieve maximum sound projection and penetration.
Weather-resistant metal construction and reentrant acoustic path assure protection against water, humidity and corrosion. 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.
All models include a built-in 25/70 V transformer featuring a screwdriver adjustable, 7-position watt/impedance selection switch. Wiring terminals are protected with a vandal-resistant adapter cover for control equipment utilizing cable or conduit.
A built-in capacitor is provided on both models for line supervision.
All models meet or exceed ULC's requirements for speakers and are capable of operating within an ambient temperature range of 150° F (66° C) to -31° F (-35° C). Models comply with ULC Standard CAN/ULC-S541-2016 for speakers.
Applications
The Wheelock STH-15S-ULC supervised horn
loudspeakers are surface-mounting, high-efficiency
units for life safety and communication system
applications. When used with compatible control
equipment, they provide high-intelligibility voice
reproduction and signal transmission for indoor or
outdoor emergency alarm and protective signaling.
Features
- Approvals include ULC Standard CAN/ULC-S541-2016 for speakers
- 15-Watt high-efficiency compression driver
- Weather-resistant, vandal-resistant aluminum construction assures protection against water, humidity and corrosion
- Reentrant acoustic path
- 25/70 V transformer featuring a screwdriver adjustable, 7-position watt/impedance selection switch
- Capacitor for line supervision
- STH-15S-ULC gray-baked epoxy finish; STH-15SR-ULC red-baked epoxy finish
- Simplified, universal-mounting bracket adjustable in horizontal and vertical planes with banding slots for beam or pillar mounting
- Installation terminals and power selector are recessed mounted, and protected by the metal interface adapter, or clear plastic shield
General Specifications
- Dispersion angle: 70 Degrees
ULC Rating Specifications
- Power rating: 15 Watt continuous
- Frequency response: 400-4,000 Hz (nominal)
- Sensitivity: 102 dB @ 15 Watts @ 10 ft.
