273 Branchport Avenue
Long Branch, N.J. 07740
(732) 222-6880
INSTALLATION INSTRUCTIONS
TALKBACK HORN SYSTEM
MODEL NUMBER: TBH-104
APPLICATION INFORMATION:
WARNING: ANY MATERIAL EXTRAPOLATED FROM THIS DOCUMENT OR FROM WHEELOCK MANUALS OR OTHER DOCUMENTS
DESCRIBING THE PRODUCT FOR USE IN PROMOTIONAL OR ADVERTISING CLAIMS, OR FOR ANY OTHER USE, INCLUDING DESCRIPTION
OF THE PRODUCT'S APPLICATION, OPERATION, INSTALLATION AND TESTING IS USED AT THE SOLE RISK OF THE USER AND WHEELOCK
WILL NOT HAVE ANY LIABILITY FOR SUCH USE.
The TBH-104 is a two component talkback system which consists of a control unit and an 8 ohm horn, both of which are designed for indoor or outdoor
use. An optional S-H8 8 ohm horn may be added to the TBH-104 system when 2 horns are required. The control unit contains an omni-directional
microphone and a preamplifier for talkback. It also contains a 4 watt amplifier to power the horn which is used for one-way voice paging, background
music and tone alerting. The TBH-104 is compatible with most EKSU, KSU (1A2) and PABX systems. The TBH-104 may be used in single zone or
multi-zone applications. For typical connection applications for the TBH-104, See Figure 2.
The 4 watt voice paging capability of the TBH-104 is ideal for use in noisy environments or for large areas. The talkback capability of the TBH-104 will
effectively service up to 1000 square feet, depending upon the background noise level. See Figure 1 and Chart 1 for relation between noise and
maximum reply distance. The direction of speech is controlled by the calling party (at the telephone), to prevent false switching of speech direction due
to background noise.
Location
Machine Shop
Manufacturing (Noisy)
Printing Shop
Assembly Line
Supermarket
Transportation -
Waiting
Room
Office
(Noisy)
Shipping/Warehouse
dB
90
80
80
75
75
75
70
70
Figure 1: Talkback Distance Vs. Ambient Noise
Chart 1: Typical Noise Levels
Figure 2: Talkback/Paging Connections & Applications
Figure 2A: Optional S-H8 Second Horn Connection
CAUTION:
These devices are not intended for use in hazardous locations as defined by the National Electrical Code (NEC) and by the National
Fire Protection Association (NFPA).
Copyright 1988, 1989, 1990, 1991, 1993, 1994 Wheelock, Inc. All rights reserved.
P81752 G
Sheet 1 of 4
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