Niles Audio Switch VCS HUB8 User Manual

INSTALLATION & OPERATION GUIDE  
VCS HUB8  
Volume Control Distribution Hub  
Niles Audio Corporation  
©2003 Niles Audio Corporation. All rights reserved. Niles, the Niles logo, and Blending Technology and Architecture are reg-  
istered trademarks of Niles Audio Corporation. Decora is a registered trademark of Leviton Manufacturing. All other trademarks  
are the property of their respective owners. Some of Niles products (or components thereof) are manufactured under one or  
more U.S. Patents, foreign equivalents and/or pending patents (see product for details). Because we constantly strive to improve  
our products, Niles reserves the right to change product specifications, descriptions, and prices without notice. The technical  
and other specifications of information contained herein is not intended to set forth all technical and other specifications of Niles  
China 7/03 DS00312BCN  
12331 S.W. 130 Street  
Miami, Florida 33186  
Tel: (305) 238-4373  
Fax: (305) 238-0185  
®
B L E N D I N G H I G H F I D E L I T Y A N D A R C H I T E C T U R E  
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AMPLIFIER’S MINIMUM SPEAKER LOAD IS 4 OHMS  
8 OHM Speaker Pairs  
to verify that they are set correctly for the impedance load of  
your speakers.  
In a typical application of  
IM volume controls, a  
system has eight pairs of  
8-ohm speakers through-  
out the house. Each pair  
of speakers is connected  
to an IM volume control  
with its switches set  
for 8x.  
ities require a special type of speaker  
wire with a specific CL fire rating,  
such as CL-2 or CL-3. Consult your  
Niles dealer, building contractor, or  
local building-inspection depart-  
ment if you aren’t sure what kind of  
wire is best for your application.  
12 AWG  
14 AWG  
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8
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10 11 12 13 14 15 16  
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1x  
2x  
Use the following instructions and the accompanying charts to  
select the correct switch setting on the volume controls for the  
number and type of speakers in your system.  
4x  
8x  
4 OHM  
Speaker  
Pairs  
TECH TIP  
1. Count the number of pairs of 4-ohm speakers and the num-  
ber of pairs of 8-ohm speakers you are connecting. Count  
pairs of 6-ohm speakers as 4-ohm pairs.  
Wire size is expressed by its  
AWG (American Wire Gauge)  
number. The lower the AWG  
number, the larger the wire.  
Thus, 12 AWG wire is physi-  
cally larger than 14 AWG.  
Mounting Location  
Figure 2  
The VCS HUB8 is designed  
specifically to fit into a structured-  
wiring cabinet, with snap-in  
“Christmas tree” plugs for conven-  
ient installation.  
With eight pairs of speak-  
ers, one-eighth of the  
amplifier’s power is avail-  
able to any pair.  
Therefore, an amplifier rated at 100W per channel RMS into  
8 ohms will deliver up to 12.5W to each of the eight pairs –  
whether you play all eight pairs or just one pair. This translates  
into a drop in the maximum volume capability of about 9dB at  
the 8x setting.  
2. Determine whether the amplifier should see a 4-ohm load or  
an 8-ohm load. You should find this information in the  
owner’s manual of the amplifier.  
AMPLIFIER S MINIMUM SPEAKER  
LOAD IS 8 OHMS  
Figure 4  
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4x  
3. Read the correct switch position from the charts on the next  
page. See Figure 2 if your amplifier can drive a 4-ohm  
load. See Figure 3 if your amplifier must have an 8-ohm  
speaker load.  
4 OHM  
Speaker  
Pairs  
4x  
Alternatively, you can mount it on a wall, a basement floor  
joist, or some other unobtrusive location.  
4x  
INSTALLATION  
Figure 3  
4. Set the switches on all of the controls to the same position  
(1x, 2x, 4x, or 8x).  
Type of Speaker Wire  
1. Run all necessary wiring to the VCS HUB8. Label the wires  
for future reference.  
We recommend 16-gauge stranded copper speaker wire for  
most connections, and 14-gauge wire for runs longer than 80  
feet. Don’t use speaker wire larger than 14 gauge, because larg-  
er wire may not fit into the connectors. Never use solid-core,  
aluminum, or Romex wire with an IM volume control. For  
speaker-wire runs within walls, most U.S. states and municipal-  
CAUTION! Every speaker pair in the system must be con-  
nected to an impedance-magnifying volume control and set to  
the same magnification.  
Limitations in Volume with High Magnification Settings  
2. Secure the VCS HUB8 in a suitable location. In a structured-  
wiring cabinet, use the convenient snap-in “Christmas Tree”  
plugs (supplied) to mount it in the cabinet frame. On a wall  
or other flat surface, remove the snap-in plugs, insert drywall  
screws (not supplied) through the resulting holes, and secure  
Using an 8x setting limits the power to each speaker pair to  
one-eighth of the amplifier’s output.  
When you install the VCS HUB8 and connect the volume  
controls to it, doublecheck the switches on the volume controls  
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CONTENTS  
VCS HUB8  
the screws to the mounting surface. TAKE CARE NOT TO  
OVERTIGHTEN THE SCREWS, WHICH COULD DAMAGE  
THE HOUSING.  
7. Plug the connectors into the VCS HUB8 as shown. See  
Figure 4. The single connector plug at lower right is the input  
from the amplifier or receiver. The other connector plugs are  
the outputs, each leading to a specific volume control.  
SPECIFICATIONS  
Mounting  
In a structured-wiring cabinet, using convenient snap-in  
“Christmas tree” plugs (supplied)  
• VCS HUB8  
• Snap-in “Christmas Tree” plugs X2  
• Removable speaker connector X9  
3. Locate the connector plugs (and remove them if they are  
plugged in).  
On a wall or other flat surface, secured with drywall screws  
(not supplied)  
4. Strip 1/4" of insulation from the end of each wire. Tightly  
twist the end of each wire until no frayed ends remain.  
Wiring Requirements  
14-18 gauge, two individual runs of two-conductor speaker  
wire, or one run of four-conductor speaker wire.  
5. Use a small flathead screwdriver or your thumbnail to raise  
the locking tabs, exposing the holes on the removable con-  
nector plug.  
Unit Dimensions  
6.85" wide x 3" high x 1.3" deep  
6. Insert each wire into the appropriate hole on the removable  
connector plug, and snap the locking tab down.  
NOTE: Maintain proper phasing. Connect the positive termi-  
nals on the VCS HUB8 to the positive terminals on the ampli-  
fier or receiver, and on the volume controls. Connect the neg-  
ative terminals on the VCS HUB8 to the negative terminals on  
the amplifier or receiver, and on the volume controls. To help  
you avoid improper phasing, the connector plug is keyed.  
Insert the smooth side of the connector plug into the smooth  
side of the socket. Don’t force the scalloped side of the con-  
nector plug into the smooth side of the socket.  
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