Elk Products ELK-870 v.2 User manual

ELK-870 Amplified Speaker
Features
• Self-Contained10WattAmplifiedSpeaker.
• AmplifiesVirtuallyAnyAudio Source.
• ExpandedTelephoneSystemPaging.
• DoesNot Require25 or70V LineTransformers.
• Attractive“No-Grill”SurfaceMountEnclosure.
• Maybe Painted or Wallpapered.
• DrivesUp toThree(3)Additional8 OhmSpeakers.
• Built-inVolumeControl.
• Electrical“J”BoxMountingHoles.
• MountingHardwareIncluded.
• LifetimeLimitedWarranty.
Specifications
• RatedOutput: 10Watts.**
• PowerInput: 12to 24VoltsA.C. orD.C.**
• Speaker (Output)Load: 2 to 16Ohms.**
• CurrentDraw: 50 to800mA (depending onload& volume setting)
• Input Impedance: 1000 OhmsNominal.
• Size: 4.375" H x 6.375" W x 1.875" D.
Echo™Series
PO Box 100 • Hildebran, NC 28637 • 800-797-9355 • 828-397-4200
Fax[phone]• www.elkproducts.com • [email protected] ELK
PRODUCTS, INC.
The ELK-870 is a self amplified interior speaker
mountedinanattractivesurfacemountplasticenclosure.
Itmaybe connected toanaudio source, ie:microphone,
telephonesystempagingoutput,etc.,evenanordinary
singleline phone set.The audiosource is amplifiedup to
10watts,adjustablefromanon-boardvolume control.
This Echo™ Series speaker is designed to be heard but
notseen!.Sound“echoes”off mounting surface from
backplate edge. This uniquecontemporary speaker has
asmooth,paintable,“no grill” surface thateasilyblends
withanydecor.This speaker mountstoanyflat surface or
singlegang electrical box.For additional coverage,up to
three(3) external 8Ohmspeakers may bewiredin
parallelwiththeinternal speaker.TheELK-870 operates
on 12 to 24 VoltsA.C. or D.C. and requires only 22-24
gaugetelco or alarmtypewire.

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 (hard-
ware included).
3. Connect all wiring as follows. Recommended wire gauge is 22-24 AWG. If distance exceeds 1000' use 18-20 gauge.
PWRIN: 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
asplayingmusic,youmayneedtoreducethevolumeoutput,orlowerthepowerinputvoltage,orlowerthespeakerloading
in order to keep the ELK-870 from overloading and shutting down.
AUDIOIN: 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 PagingApplications
Ambient Sound Level Location Speaker Spacing
Quiet 50 to 65db Offices 120 feet (14,400 sq. ft.)
Moderate 65 to 80db Light Manufacturing 90 feet (8,100 sq. ft.)
Noisy 80 to 90 db Heavy Manufacturing 60 feet (3,600 sq. ft.)
Very Noisy +90db 40 feet (1,600 sq. ft.)
10/03 FIGURE 1: WIRING HOOKUP
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
Built-In
20 Watt
Speaker
MIN VOLUME MAX
ELK-870 v.2
Audio Amp
PC Board
Power Input
12 to 24 Volts
AC or DC**
No Polarity
Audio Input
Microphone, Telephone
System Paging Output
SPKR
Power Input
12 to 24 Volts
DC ONLY
- +
EXAMPLE 1: BASIC PUBLIC ADDRESS "PA" SYSTEM
(using the ELK-870 and a common Telephone)
1,000 Ohm
1/2 Watt
Resistor
PWR IN
GREEN
RED
DO NOT CONNECT
TO TELCO LINES
AUDIOIN
MIN VOLUME MAX
SPKR
PWR IN
AUDIOIN