Elk Products ELK-870 User manual
PO Box 100 • Hildebran, NC 28637 USA • 828-397-4200 Voice • 828-397-4415 Fax
http://www.elkproducts.com • email: info@elkproducts.com
"Echo" Interior Self Amplified Speaker ELK-870
APPLICATION
TheELK-870isaselfamplifiedinteriorspeakerwhichmaybeconnectedtovirtuallyanyaudiosource,
ie: microphone, radio, computer sound card, telephone PBX or KEY system paging output, etc., even
anordinarysinglelinephoneset. The audio source is amplifiedupto10watts,adjustable from an on-
board volume control. The ELK-870 features a reverse mounted, high quality internal speaker that
effectivelyechos the sound offthe surrounding mountingsurface. This arrangement enrichesthe low
frequency ranges and reduces the undesirable high "tinny" frequencies. The attractive "no-grille"
surface of the ELK-870 may be painted or wallpapered to match the surrounding decor. It is wall or
ceiling mountable. 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
only22-24gaugetelcooralarmtypewire.
05/02
FEATURES:
•Self-Contained 10 Watt Amplified Speaker.
•AmplifiesVirtuallyAnyAudioSource.
•Expanded Telephone System Paging.
•Does Not Require 25 or 70V Line Transformers.
•Attractive"No-Grille" Surface Mount Enclosure.
•May be Painted or Wallpapered .
•Drives Up to Three (3) Additional 8 Ohm Speakers.
•Built-in Volume Control & Gain Select.
•Electrical "J" Box Mounting Holes.
•MountingHardwareIncluded.
SPECIFICATIONS:
•Operating Voltage: 12 to 24V A.C. or D.C.
•Input Impedance: 1000 Ohms Nominal.
•Audio Input Level: -15 dBm to +10 dBm.
•Rated Output: 10 Watts.
•Output Speaker Load: 2 to 16 Ohms.
•Current Draw: 38 - 800 mA Depending on
Load and Volume Settings.
•Temperature: 0 to 130°F.
•Humidity: 0 to 95% Non-Precipitating.
•Lifetime Limited Warranty.
•PatentPending.
Features and Specifications subject to change without notice.
INSTALLATION for ELK-870
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 guage.
PWRIN: Connect a good quality 12 to 24 Volt A.C. or D.C. power source. No polarity need be observed.
AUDIO IN: Connect an audio input source. ie: microphone, radio, computer sound card, telephone PBX or KEY system paging output, etc.,
even an ordinary single line phone set (see diagram below). With Jumper JP1 set in the NO PREAMP position the ELK-870 is
setup for an audio signal of -15 dbm to + 10 dbm. This jumper may be placed in the PREAMP position to provide +18dbm addition
gain for weak audio input signals
SPKR: Internal speaker 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-14, ELK-1...) may be connected in parallel on these two terminals.
Recommended ELK-870 Spacing For Background Paging Applications
Ambient Sound Level Location Speaker Spacing
Quiet 50 to 65db Offices 120 feet (14,400 sq. feet)
Moderate 65 to 80db Light manufacturing 90 feet (8,100 sq. feet)
Noisy 80 to 90db Heavy manufacturing 60 feet (3,600 sq. feet)
Very Noisy +90cb 40 feet (1,600 sq. feet)
VOLUME: Turn the volume control clockwise (CW) to increase volume. Adjust to a comfortable level.
PREAMP: If the audio input signal is too low for proper amplification, place Jumper JP1 into the PREAMP position for an additional audio
input gain of +18 dbm (8 X gain).
LIFETIME LIMITED WARRANTY
Elk Products, Inc. (“Manufacturer”) warrants to the original purchaser (the “Customer”) that the products it manufactures (“Product”) shall be free from defects in material and workmanship at time of shipment.
Manufacturer’s obligations under this Limited Warranty shall be limited to repairing or replacing, at its option, free of charge, any product returned to Manufacturer freight prepaid. Manufacturer shall have
no obligation under this Limited Warranty or otherwise if (1) the Product has been damaged by negligence, accident, mishandling, lightning or flood, or other Acts of God, (2) the Product has not been operated
in accordance with its operating instructions, (3) the Product has been altered or repaired by anyone outside Manufacturer’s authorized facilities (4) adaptations or accessories have been made or attached
to the Product which, in Manufacturer’s sole determination, have adversely affected its performance, safety or reliability. Products such as batteries and fused transformers have their own warranties, and
are not included in this Limited Warranty.
If a Product should malfunction or fail, contact Manufacturer or one of its authorized distributors for a Return Authorization (RA) number. Returned Products must include a complete description of the problem,
along with the RA number clearly marked on outside of the package. Manufacturer will not be responsible for any unnecessary items included with any returned Product.
THIS WARRANTY IS THE EXCLUSIVE WARRANTY FOR ANY PRODUCT. MANUFACTURER SPECIFICALLY DISCLAIMS ANY AND ALL OTHER WARRANTIES OF ANY KIND, EXPRESS OR IMPLIED,
INCLUDINGANYWARRANTIESOF FITNESSFORAPARTICULARPURPOSEOR OFMERCHANTABILITY.MANUFACTURERSHALLNOTBE LIABLE INTORT,INCLUDINGNEGLIGENCEORSTRICT
LIABILITY, AND SHALL HAVE NO LIABILITY AT ALL FOR INJURY TO PERSONS OR PROPERTY. MANUFACTURER’S LIABILITY FOR FAILURE TO FULFILL ITS OBLIGATION UNDER THIS LIMITED
WARRANTYORANYOTHERLIABILITYIN CONNECTION WITHAPRODUCTSHALLBELIMITEDTOTHEAMOUNTOFTHEPURCHASE PRICE RECEIVEDBYMANUFACTURERFORTHEPRODUCT.
THE REMEDIES STATED IN THIS LIMITED WARRANTY ARE THE CUSTOMER’S EXCLUSIVE REMEDIES AGAINST MANUFACTURER REGARDING ANY PRODUCT. UNDER NO CIRCUMSTANCES
SHALL MANUFACTURER BE LIABLE FOR ANY INDIRECT, INCIDENTAL, SPECIAL OR CONSEQUENTIAL DAMAGES, INCLUDING LOST PROFITS AND REVENUES, INCONVENIENCE OR
INTERRUPTIONSINOPERATIONS, OR ANYOTHERCOMMERCIALORECONOMIC LOSSESOFANYKIND.THESELIMITATIONS ANDDISCLAIMERSARENOTMADEBY MANUFACTURERWHERE
PROHIBITED BY LAW. SOME STATES PROHIBIT LIMITATIONS OF WARRANTIES AND THE CUSTOMER MAY HAVE ADDITIONAL RIGHTS IN THOSE STATES.
FormoreinformationcontactyourlocalDistributoror: ELKProducts,Inc. - POBox100 - 3266USHwy.70West - Hildebran,NC, - 28637 - USA - 828-397-4200
FIGURE 1: WIRING HOOKUP
OPTIONAL
Up to three (3) additional 8 Ohm
speakers maybe connected in parallel
Min. rating = 20 watt
IE: ELK-70, ELK-14, ELK-1, ELK-44...
PRE NO
AMP PRE
Built-In
20 Watt
Speaker
MIN VOLUME MAX
ELK-870
Audio Amp
PC Board
12 to 24 Volts
AC or DC
No Polarity
Audio Source
Microphone, Radio, PC
Sound Card, Telephone
System Paging Output
SPKR
JP1
12 to 24 Volts DC
ONLY
- +
PWR IN AUDIO IN
EXAMPLE 1: BASIC PUBLIC ADDRESS "PA" SYSTEM
(using the ELK-870 and a plain Telephone)
1,000 Ohm
1/2 Watt Resistor
PWR IN AUDIO IN
GREEN
RED
DO NOT CONNECT
TO TELCO LINES
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