FIRE ALARM SPEAKERS
EDWARDS SYSTEMS TECHNOLOGY
4” Cone Speaker
965-1C Series
Features
n 70 VOLT RMS
All speakers are supplied with ‘DC Blocking
Capacitor’ for audio circuit supervision.
n HIGH dBA OUTPUT
High efficiency, mylar speaker cone with sealed
construction produces 90 dBA at 2 watts.
n MULTIPLE OUTPUT TAPS
Select for 1/4, 1/2, 1, or 2 watt operation using large
terminal block.
n SCREW TERMINAL WIRE CONNECTION
Large terminals speed installation and accept up to
#12 AWG (2.5mm2) wire.
n MOUNTS TO 4” SQUARE BOX
Flush mount to standard North American 4” square
box with 2-1/8” (54 mm) extension ring.
Description
EST’s 965 Series Speakers are designed for broadcasting
high quality, integrated, emergency voice communications,
alert and alarm tone signals. Use them in life safety
applications, especially where transitory people are
expected such as hotels, malls, airports, hospitals and other
public buildings.
ambient sound level or 5 dB above the maximum sound level
having a duration of at least 60 seconds, whichever is
greater, measured 5’ (1.5 m) above the floor. The average
ambient sound level is the RMS, A-weighted sound pressure
measured over a 24-hour period.
Doubling the distance from the signal to the ear will
theoretically cause a 6 dB reduction in the received sound
pressure level. The actual effect depends on the acoustic
properties of materials in the space. Doubling the power
output of a device (e.g. speaker from 1W to 2W) will
increase the sound pressure level by 3 dBA. A 3 dBA
difference is a “just noticeable” change in volume.
Typical Sound Output Distribution
dBA measured at 10 feet (3.05 m) in anechoic chamber
965 Series CONE SPEAKER
The speakers are shipped complete with a ‘DC Blocking
Capacitor’ to permit electrical supervision of the 70 VRMS
audio distribution circuit. The mylar speaker cone with its
sealed construction provides extra durability and improved
audibility. Wattage taps from 1/4 to 2 watt provide maximum
on-site flexibility where higher or lower output is desired.
Tap selection is easy using the speaker’s large terminal
block suitable for up to #12 AWG wire.
Baffles are finished with an attractive yet durable, high
quality, baked white epoxy polyester powder-coat. Choose
either 7.35 inch (187 mm) diameter round or 7 inch (178
mm) square steel baffles. The speakers mount easily to
EST’s custom 960A Series flush or surface boxes. Flush
boxes are made from satin-coat steel and have flexible
mounting straps for using with poured concrete forms. The
square surface box has a matching white finish.
Ceiling and wall mount Speakers and Speaker/Strobe
combinations are also available.
Audible Signal Application
Suggested sound pressure levels in each signaling zone for
alert or alarm signals are at least 15 dB above the average
Application Notes - CANADA
(Based in part on 1995 Canada National Building Code)
The fire alarm signal sound pressure level shall not exceed
110 dBA in any normally occupied area. The sound pressure
level from an audible signal in a floor area used for
occupancies other than residential occupancies shall be not
EDWARDS SYSTEMS TECHNOLOGY
SARASOTA, FLA. 941-739-4200 Fax: 941-727-0740
CHESHIRE, CT. 203-699-3000 Fax: 203-699-3108
OWEN SOUND, CANADA 519-376-2430 Fax: 519-376-7258
INTERNATIONAL: CANADA 905-270-1711 Fax: 905-270-9553
PITTSFIELD, ME. 207-487-3104
85001-0347
1 of 4 Iss. 1
less than 10 dBA above the ambient noise, and never less
than 65 dBA. The sound pressure level in sleeping rooms
from an audible signal shall not be less than 75 dBA when
any intervening doors between the device and the sleeping
room are closed. Audible signal devices shall be installed
not less than 1.8 m to the center of the device above the floor
(per CAN/ULC S524).
The fire alarm audible signal shall be supplemented by fire
alarm strobes in any floor area where the ambient noise level
exceeds 87 dBA, or where the occupants of the floor area
use ear protective devices, are located within an audiometric
booth, or are located within sound insulating enclosures. This
also applies to assembly occupancies in which music and
other sounds associated with performances could exceed
100 dBA.
Specifications
Catalog Number
965-1C-4RW
965-1C-4SW
Input/Operating Volts
70 VRMS
70 VRMS
Speaker Taps/Output (note 1)
Measured at 10" (3.05 m): 2W = 88 dBA, 1W = 85 dBA, 1/2W = 82 dBA, 1/4W = 79 dBA
Speaker Cone
4" (102 mm) mylar cone, sealed back construction, rated for 8 watts, 8 ohm voice coil
INDOOR Operating Environment
85% @ 30oC relative humidity; 32-120oF (0-49oC) ambient temperature
Wire Connections
Terminals - polarized inputs for Speaker, #12 AWG (2.5mm2) maximum
Housing/Baffle *
Steel, White baked epoxy polyester powder-coat finish
Mounting - INDOOR
Flush Round: 960A-4RF; Flush Square: 960A-4SF; Surface Square: 960A-4SS Alternate
Flush Mount: North-American 4" square box, with 2-1/8" (54 mm) extension ring
Agency Listings
ULC S541
* -4RW models are Round; - 4SW models are Square
Note 1 - Measured at 10 feet (3.05 M) in anechoic chamber at 1000 Hz tone per ULC S541.
Frequency Response/dBA Output Plot
Swept Sine wave data measured at 10 feet (3.05 m) in an anechoic chamber.
SPL (dBA)
98
92
SPL (dBA)
86
80
74
68
62
56
FREQUENCY - HZ
EDWARDS SYSTEMS TECHNOLOGY
SARASOTA, FLA. 941-739-4200 Fax: 941-727-0740
CHESHIRE, CT. 203-699-3000 Fax: 203-699-3108
OWEN SOUND, CANADA 519-376-2430 Fax: 519-376-7258
INTERNATIONAL: CANADA 905-270-1711 Fax: 905-270-9553
PITTSFIELD, ME. 207-487-3104
5600
5750
5900
5300
5450
4850
5000
5150
4550
4700
4100
4250
4400
3800
3950
3350
3500
3650
3050
3200
2600
2750
2900
2300
2450
1850
2000
2150
1550
1700
1225
1300
1400
1075
1150
850
925
1000
700
775
520
580
640
400
460
50
85001-0347
2 of 4 Iss. 1
Installation and Mounting
EST recommends mounting to 960A Series boxes. All models also fit to standard flush mounted North-American 4" square
electrical box with 2-1/8” (54 mm) extension ring. For surface mount, use EST’s custom box painted in colour-matched white
epoxy. EST recommends that fire alarm speakers always be installed in accordance with the latest recognized edition of
national and local fire alarm codes.
EDWARDS SYSTEMS TECHNOLOGY
SARASOTA, FLA. 941-739-4200 Fax: 941-727-0740
CHESHIRE, CT. 203-699-3000 Fax: 203-699-3108
OWEN SOUND, CANADA 519-376-2430 Fax: 519-376-7258
INTERNATIONAL: CANADA 905-270-1711 Fax: 905-270-9553
PITTSFIELD, ME. 207-487-3104
85001-0347
3 of 4 Iss. 1
Typical Wiring
The speaker must be connected to 70 VRMS audio circuits.
Ordering Information
Catalogue Number Description
Ship
Wt. lb.
(kg)
70 Volt SPEAKERS
965-1C-4RW
Speaker, 70V, Round
965-1C-4SW
Speaker, 70V, Square
WARNING: These devices will not operate without electrical
power. As fires frequently cause power interruptions, we
suggest you discuss further safeguards with your local fire
protection specialist.
3 (1.4)
MOUNTING ACCESSORIES
960A-4RF
Round Flush Box, Indoor
960A-4SF
Square Flush Box, Indoor
960A-4SS
Square Surface Box, Indoor,
White
2 (1.0)
2 (1.0)
EDWARDS SYSTEMS TECHNOLOGY
SARASOTA, FLA. 941-739-4200 Fax: 941-727-0740
CHESHIRE, CT. 203-699-3000 Fax: 203-699-3108
OWEN SOUND, CANADA 519-376-2430 Fax: 519-376-7258
INTERNATIONAL: CANADA 905-270-1711 Fax: 905-270-9553
PITTSFIELD, ME. 207-487-3104
85001-0347
4 of 4 Iss. 1
It is our intention to keep the product information current and
accurate. We can not cover specific applications or anticipate
all requirements. All specifications are subject to change without notice. For more information or questions relative to this
Specification Sheet, contact EST.
© 1996 EST
Printed in Canada