Bosch S8-70-25 Specsheet

Fire Alarm Systems | S8‑70/25 Ceiling‑mount Dual‑voltage Speaker (white)

S8‑70/25 Ceiling‑mount Dual‑voltage
Speaker (white)

www.boschsecurity.com

u 24 VDC with a wide UL regulated voltage range

using filtered VDC or unfiltered VRMS input

The Wheelock S8‑70/25 Ceiling‑mount Dual‑voltage
Speaker provides high audible output with clear
audibility at either of its field‑selectable voltages
(25 VRMS or 70 VRMS) and at all of its field‑selectable
powers (1/8 W, 1/4 W, 1/2 W, 1 W, 2 W, 4 W, or 8 W).
The speakers have a 12‑inch round metal grill and a
molded, flame‑retardant core.

Certifications and approvals

Cooper Wheelock, Inc. holds these Listings and
Approvals:

Region Certification

u Field‑selectable voltages of 25 VRMS or 70 VRMS

and powers from 1/8 W to 8 W

u High efficiency design for maximum output at

minimum wattage across a frequency range of
400 Hz to 4 kHz

u Compatible with DC circuit supervision

Mounting Considerations

The S8‑70/25 Speaker is designed to mount flush in a
hung tile ceiling. The CBB‑8 Circular Back Box or its
equivalent is required to meet UL1480 requirements.
When the speaker and back box cannot be installed
directly through a ceiling tile, a support bridge (SBB‑8
or equivalent) must be used.

Notice

Do not use these speakers in hazardous locations
as defined by the National Electrical Code (NEC)
and by NFPA. Do not expose these speakers to
rain or moisture.

USA UL UUMW: Speakers and Amplifiers for Fire

Protective Signaling Systems (UL1480,
UL1711, and UL2043)

CSFM see our website

Installation/configuration notes

Compatibility Information

These speakers are compatible with Wheelock
SAFEPATH4 Facility Communication Systems and
Bosch Voice Evacuation Systems.

Wiring Considerations

The terminal block accepts two 12 AWG (2.3 mm) to
18 AWG (1.2 mm) stranded wires at each screw
terminal.

2 | S8‑70/25 Ceiling‑mount Dual‑voltage Speaker (white)

Parts included

Quant. Component

1 Speaker

1 Literature pack

Technical specifications

Environmental

Relative Humidity: Up to 85%, non‑condensing

Temperature (operating): +32°F to +120°F (0°C to +49°C)

Mechanical

Color: white, powder coat

Diameter: Grill: 12 in. (30.5 cm)

Speaker: 8 in. (20.3)

Weight: 3.75 lb (1.7 kg)

Electrical

Voltage

Range : 16.0 VDC or VRMS to 33.0 VDC or VRMS

Regulated: 24 VDC or VRMS

Accessories

CBB‑8 Circular Back Box

Overall (flange) diameter of 31.3 cm (12.3125 in.),
interior diameter of 24.8 cm (9.75 in.), depth of

10.3 cm (4.1 in.)

Order number CBB-8

SSB‑8 Ceiling Support Bridge

23.75 in. (60.3 cm) long by 14.5 in. (36.8 cm) wide

Order number SSB-8

Speaker Characteristics

Frequency Response: 200 Hz to 15 kHz (400 Hz to 4 kHz UL)

Impedance: 8 Ω

Decibel Rating at 10 ft (3 m):

1/8 W: 75 dBA

1/4 W: 78 dBA

1/2 W: 81 dBA

1 W: 84 dBA

2 W: 87 dBA

4 W: 90 dBA

8 W: 93 dBA

Trademarks

All hardware and software product names used in this
document are likely to be registered trademarks and
must be treated accordingly.

Ordering information

S8‑70/25 Ceiling‑mount Dual‑voltage Speaker (white)

Compatible with Wheelock SAFEPATH4 Facility
Communication Systems and Bosch Voice Evacuation
Systems

Order number S8-70/25