870 sales sheet

870 sales sheet
Echo™ Series
ELK-870 Amplified Speaker
The ELK-870 is a self amplified interior speaker
mounted in an attractive surface mount plastic enclosure.
It may be connected to an audio source, ie: microphone,
telephone system paging output, etc., even an ordinary
single line phone set. The audio source is amplified up to
10 watts, adjustable from an on-board volume control.
This Echo™ Series speaker is designed to be heard but
not seen!. Sound “echoes” off mounting surface from
back plate edge. This unique contemporary speaker has
a smooth, paintable, “no grill” surface that easily blends
with any decor. This speaker mounts to any flat surface or
single gang electrical box. For additional coverage, up to
three (3) external 8 Ohm speakers may be wired in
parallel with the internal speaker. The ELK-870 operates
on 12 to 24 Volts A.C. or D.C. and requires only 22-24
gauge telco or alarm type wire.
Features
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Self-Contained 10 Watt Amplified Speaker.
Amplifies Virtually Any Audio Source.
Expanded Telephone System Paging.
Does Not Require 25 or 70V Line Transformers.
Attractive “No-Grill” Surface Mount Enclosure.
May be Painted or Wallpapered.
Drives Up to Three (3) Additional 8 Ohm Speakers.
Built-in Volume Control.
Electrical “J” Box Mounting Holes.
Mounting Hardware Included.
Lifetime Limited Warranty.
Specifications
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Rated Output: 10 Watts.**
Power Input: 12 to 24 Volts A.C. or D.C.**
Speaker (Output) Load: 2 to 16 Ohms.**
Current Draw: 50 to 800mA (depending on load & volume setting)
Input Impedance: 1000 Ohms Nominal.
Size: 4.375" H x 6.375" W x 1.875" D.
PO Box 100 • Hildebran, NC 28637 • 800-797-9355 • 828-397-4200
Fax 828-397-4415 • www.elkproducts.com • info@elkproducts.com
ELK
PRODUCTS, INC.
Instructions
ELK-870
v.2
1.
Remove the front cover by inserting and twisting the tip of a wide flat-blade screwdriver in the slots along the edge of the
housing.
2.
Mounting holes are provided on the backplate for a standard electrical J-box as well or for direct surface mounting (hardware included).
3.
Connect all wiring as follows. Recommended wire gauge is 22-24 AWG. If distance exceeds 1000' use 18-20 gauge.
PWR IN:
Connect to a good quality 12 to 24 Volt A.C. or D.C.** Power Source. No Polarity.
D.C. Power is recommended for a cleaner output.
**NOTE: The ELK-870 is primarily designed for short duration (intermittent) paging applications. For long durations, such
as playing music, you may need to reduce the volume output, or lower the power input voltage, or lower the speaker loading
in order to keep the ELK-870 from overloading and shutting down.
AUDIO IN: Connect an audio input source. ie: microphone, telephone PBX or KEY system paging output, etc., even an ordinary
single line phone set (see diagram below).
SPKR:
Internal speaker is already connected. The ELK-870 speaker output can handle up to a maximum load of two (2)
Ohms**. Up to three (3) additional 8 Ohm speakers (MIN = 20 Watt (ELK-70, ELK-73, ELK-44) may be connected in
parallel on these two terminals.
VOLUME: Turn the volume control clockwise (CW) to increase volume. Adjust to a comfortable level.**
Recommended Speaker Spacing for Paging Applications
Ambient Sound Level
Quiet 50 to 65db
Moderate 65 to 80db
Noisy 80 to 90 db
Very Noisy +90db
Location
Offices
Light Manufacturing
Heavy Manufacturing
Speaker Spacing
120 feet (14,400 sq. ft.)
90 feet (8,100 sq. ft.)
60 feet (3,600 sq. ft.)
40 feet (1,600 sq. ft.)
Audio Input
Microphone, Telephone
System Paging Output
Power Input
12 to 24 Volts
DC ONLY
-
Power Input
12 to 24 Volts
AC or DC**
No Polarity
+
PWR IN
PWR IN
1,000 Ohm
1/2 Watt
Resistor
SPKR
EXAMPLE 1: BASIC PUBLIC ADDRESS "PA" SYSTEM
(using the ELK-870 and a common Telephone)
OPTIONAL
Up to three (3) additional 8 Ohm
speakers may be connected in parallel
Min. rating = 20 watt
IE: ELK-70, ELK-73, ELK-44
FIGURE 1: WIRING HOOKUP
10/03
ELK-870 v.2
Audio Amp
PC Board
AUDIO IN
SPKR
RED
AUDIO IN
GREEN
MIN VOLUME MAX
MIN VOLUME MAX
DO NOT CONNECT
TO TELCO LINES
Built-In
20 Watt
Speaker
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