Bosch STH-4R Specsheet

Fire Alarm Systems | STH Series Cluster Horn Loudspeakers
STH Series Cluster Horn Loudspeakers
Multi‑directional sound
Field‑selectable taps from 1 W to 15 W for either
25 VRMS or 70 VRMS
UL‑rated reverberant frequency range from 400 Hz to
4 kHz
Mounts on wall or ceiling
Conduit knockouts for ½‑inch or ¾‑inch couplings
The Wheelock STH Series Cluster Horn Loudspeakers are designed for high ambient noise environments such as manufacturing plants, processing plants, and factories.
are
They horns that meet the requirements of UL1480. Each horn can deliver up to 102 dB at 15 W at 10 ft (3 m).
available in configurations with two, three, or four

Functions

Sound Settings
Each loudspeaker has a slotted rotating switch used to set the output decibels. Refer to the installation instructions packed with the product for specific information about these settings.
Strobe Option
To provide can be detached from the enclosure and surface mounted on a wall, ceiling, or the enclosure using an SBL‑R Surface‑Mount Back Box with an SHMP‑R Adapter Plate and an RSSP Series Retrofit Strobe Plate.
Note The RSSP Series Retrofit Strobe Plates can be
a visual indicator, any or all of the loudspeakers
synchronized with each other using an SM or DSM Synchronization Module or by a compatible control panel.

Certifications and Approvals

Cooper Wheelock, Inc. holds these Listings and Approvals:
Listings and Approvals:
Complies with: National Fire Protection Association (NFPA 72 and
UL UUMW: Speakers and Amplifiers for Fire Protective Signaling Systems (UL1480)
NFPA 101)
Occupational Safety and Health Administration (OSHA 1910.165)

Installation/Configuration Notes

Compatibility Information
The STH Series Cluster Horn Loudspeakers are compatible with UL Listed 25 VRMS or 70 VRMS audio systems.
Mounting Considerations
Each of the horns is mounted on a galvanized steel enclosure measuring 10 in. (25.4 cm) square by 6 in. (15.2 cm) deep. Mount the enclosure on walls or ceilings capable of supporting the weight of the cluster assembly. Use appropriate fasteners.
Note These loudspeakers are for indoor use only and
are not intended for use in wash‑down areas.
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2 | STH Series Cluster Horn Loudspeakers
Wiring Considerations
Each steel enclosure. Horns can be connected together using the same wire gauge as the input wire. Refer to the installation instructions packed with the product for the proper horn numbering sequence.
is wired to a terminal block inside the galvanized
horn

Parts Included

Quant. Component
1 Cluster assembly
1 Literature pack

Technical Specifications

Audio Characteristics (Individual Horn)
Frequency Response: UL rated at 400 Hz to 4 kHz at 15 W;
400 Hz to 14 kHz anechoic
Sound Dispersion: 70°
Sound Level (peak): 120 dB at 15 W at 1 m
Environmental Considerations
Temperature (operating): -30°F to +150°F (-35°C to +66°C)
Mechanical Properties
Assembly
Color: G‑models: grey; R‑models: red
Weight (approximate): Two‑horn: 14 lb (6.1 kg)
Three‑horn: 19 lb (8.3 kg) Four‑horn: 23 lb (10.0 kg)
Enclosure
Dimensions: 10 in. (25.4 cm) square by 6 in. (15.2 cm) deep
Material: galvanized steel
Horns
Dimensions (H x W x D): 8.75 in. x 7.9 in. x 9.3 in.
(22.2 cm x 20.0 cm x 23.7 cm)
Material: Aluminum with baked epoxy finish
Power Requirements
Constant Line Voltage: 25 VRMS or 70 VRMS
Power Handling Capacity (RMS): 15 W

Ordering Information

STH‑2G Two‑horn Cluster Loudspeaker (grey)
Grey, two‑horn cluster loudspeaker for high ambient noise capability (25 VRMS or 70 VRMS) and field‑se­lectable taps from 1 W to 15 W
STH‑2R Two‑horn Cluster Loudspeaker (red)
Red, two‑horn bient noise environments with dual voltage ca­pability (25 VRMS or 70 VRMS) and field‑se­lectable taps from 1 W to 15 W
STH‑3R Three‑horn Cluster Loudspeaker (red)
Red, three‑horn cluster loudspeaker for high ambient noise capability (25 VRMS or 70 VRMS) and field‑se­lectable taps from 1 W to 15 W
STH‑4R Four‑horn Cluster Loudspeaker (red)
Red, four‑horn cluster loudspeaker for high ambient noise capability (25 VRMS or 70 VRMS) and field‑se­lectable taps from 1 W to 15 W
Accessories
RSSP‑24MCWH‑FR 24 VDC High‑candela Retrofit Strobe (red)
VDC
24 tensities of 135 cd or 185 cd
RSSP‑241575W‑FR 24 VDC Fixed‑candela Retrofit Strobe (red)
24 VDC viding 75 cd on axis
RSSP‑24MCW‑FR 24 VDC Multi‑candela Retrofit Strobe (red)
24 VDC tensities of 15 cd, 30 cd, 75 cd, or 110 cd
RSSP‑121575W‑FR 12 VDC Retrofit Strobe (red)
12 VDC viding 75 cd on axis
SBL2‑R Retrofit Device Back Box (red)
dimensions 27.8 cm (10.9 in.) x 15.5 cm (6.1 in.) x 4.3 cm (1.7 in.)
SHMP‑R Adapter Plate (red)
Red adapter plate
SHMP‑W Adapter Plate (white)
White adapter plate
SM‑12/24‑R Single Synchronization Module (red)
A 12/24 VDC Cooper Wheelock module that synchronizes notification appliances on Class B alarm circuits.
environments with dual voltage
cluster loudspeaker for high am-
environments with dual voltage
environments with dual voltage
retrofit strobe with field‑selectable in-
retrofit strobe listed at 15 cd, but pro-
retrofit strobe with field‑selectable in-
retrofit strobe listed at 15 cd, but pro-
STH-2G
STH-2R
STH-3R
STH-4R
RSSP-24MCWH-FR
RSSP-241575W-FR
RSSP-24MCW-FR
RSSP-121575W-FR
SBL2-R
SHMP-R
SHMP-W
SM-12/24-R
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