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273 Branchport Avenue
Long Branch, NJ 07740
(800) 631-2148
www.wheelockinc.com
Use this product according to this instruction manual. Please keep this instruction manual for future reference.
MODELS: ST-B4, ST-C8, ST-C8V, ST-C8M AND ST-C8MV
DESCRIPTION:
Wheelock Paging Speakers are ready to be installed assemblies consisting of a loudspeaker, round white grille, and a combination
25V/70V line matching transformer. ST-B4 includes a plastic surface mount housing. ST-C8, ST-C8V, ST-C8M and ST-C8MV
include a round flush grille. ST-C8V and ST-C8MV include a recessed volume control. ST-C8 refers to all models for specification
and installation purposes. The volume attenuation will reduce output by 20dB.
The ST-C8 models are 8" ceiling mount speakers, used primarily in office areas, hallways and other low to medium noise level areas.
The ST-B4 is a 4" surface wall mount speaker used in the same areas, when it is not convenient to mount ceiling speakers.
The areas ambient noise level will determine the speaker power (volume) tap chosen for a specific installation. Table 1 shows typical
noise levels in various locations.
WARNING: 1) 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).
2) THESE DEVICES ARE DESIGNED FOR INDOOR USE ONLY. DO NOT EXPOSE TO RAIN OR MOISTURE.
NOTE: The power taps chosen should result in the paging level exceeding the areas ambient noise level by at least 6dB, and the
background music level exceeding the ambient noise level by at least 3dB.
Copyright 1999 Wheelock, Inc. All rights reserved.
Thank you for using our products.
Installation INSTRUCTIONS
PAGING SPEAKERS WITH 25V/70V TRANSFORMER
Table 1: Typical Noise Levels
Location
Assembly Line
Supermarket
Transportation -
Waiting Room
Office (Noisy)
Shipping/Warehouse
Restaurant
Department Store
Bank (Public Area)
Office (Quiet)
Office/Doctors -
Waiting Room
Hotel Lobby
Doctors Exam Room
dB
75
75
---
75
70
70
70
65
65
55
---
55
55
55
P81832 J
Sheet 1 of 6
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Summary of Contents for Wheelock ST-B4
- Page 1 The ST-C8 models are 8" ceiling mount speakers, used primarily in office areas, hallways and other low to medium noise level areas. The ST-B4 is a 4" surface wall mount speaker used in the same areas, when it is not convenient to mount ceiling speakers.
- Page 2 Table 2: Specifications Cone Diameter ST-C8 Models ST-B4 - 4" Voice Coil Impedance 8 Ohms Speaker Magnet Weight & Material 5.3 oz. Ceramic Power Handling Capacity 6 Watts Nominal 5 Watts Nominal (Program Material) 10 Watts Maximum 8 Watts Maximum...
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Page 3: Mounting Information
Figure 2. B. ST-B4 SURFACE WALL MOUNT SPEAKERS Surface wall mounted speakers are used where it is not practical to mount ceiling speakers. Forward sound projection and spacing are important, and Table 5 provides a guide line. - Page 4 The ST-B4 is designed to mount on the surface of a wall. Remove the top cover by pushing the latch at the bottom of the housing base with a small screwdriver, See Figure 6. Figure 7 is the mounting dimension for the mounting screw locations. Mount the housing base to the wall with hardware appropriate for the mounting surface.
- Page 5 4. The total system wattage requirement should not exceed 85% of the system amplifiers rated output. The total system wattage requirement is the summation of the wattage tap selections of all system speakers. 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...
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Page 6: Limited Warranty
AND TESTING IS USED AT THE SOLE RISK OF THE USER AND WHEELOCK WILL NOT HAVE ANY LIABILITY FOR SUCH USE. Limited Warranty Wheelock products must be used within their published specifications and must be PROPERLY specified, applied, installed, operated, maintained and operationally tested in accordance with these instructions at the time of installation and at least twice a year or more often and in accordance with local, state and federal codes, regulations and laws.
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