Niles Audio Stereo Receiver SVL 6 User Manual

M O  
D
E L  
SVL-6  
SVL-6  
SPEAKER SELECTION/VOLUME CONTROL SYSTEM  
NILES  
®
I N S T A L L A T I O N & O P E R A T I O N G U I D E  
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Feat ures and Benefit s  
The SVL-6 offers a number of improvements over other  
speaker selector/volume controllers:  
The SVL-6 uses 12 position volume controls which are  
superior to 10 position designs. You get a broader range of  
adjustment —there are 10 steps of attenuation instead of  
8. Steps 11-6 attenuate -3 dB per step; steps 5-2 are 6 dB  
per step. Step 12 is "full-on" and step 1 is "full-off".  
TECH  
SUPPORT  
HOTLINE  
If you have  
questions regarding  
the operation of the  
Niles SVL-6, contact  
your local Niles  
Greater dynamic range —you get 42 dB of total attenua-  
tion instead of the usual 20 or 30 dB.  
POP-FREE switching between all steps.  
dealer or Niles  
Customer Service at  
1-800-289-4434.  
Pre-printed Room Labels are included for easy identifica-  
tion of speaker ON/OFF buttons.  
Rear-panel switch for constant or selectable impedance  
protection.  
Isolated left and right channel ground returns make the  
SVL-6 compatible with all types of amplifiers.  
Self-cleaning, silver-plated switch contacts assure many  
years of trouble free use.  
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Printed circuit board design assures high reliability.  
Two-piece removable connectors greatly simplify installa-  
tion and hookup. All wiring can be attached directly to the  
connectors before installing them in the SVL-6.  
Removable connectors accommodate up to 14 gauge wire  
or "pins", making the SVL-6 compatible with most "high-  
definition" speaker cables.  
100% tested, electronically and acoustically, for frequency  
response, distortion and power handling.  
Standard 17" width allows the SVL-6 to stack neatly with  
other standard size components.  
May be used with 4, 6, or 8-ohm speaker systems.  
Ideal for both home and commercial sound installations.  
Only an 1/8" standard screwdriver and wire stripper are  
required for installation.  
Power handling: 100 watts/channel continuous music  
power.  
Frequency response: 20 Hz to 20 kHz +/-1.2 dB.  
Ten year parts and labor warranty.  
Proudly made in the USA.  
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Inst allat ion Considerat ions  
SVL-6 Power Handling  
TOOLS  
REQUIRED  
The SVL-6 is designed for use with a receiver or amplifier hav-  
ing a maximum power output of 100 watts per channel at 8  
ohms. Damage caused by the use of a higher-power receiver  
or amplifier will void the warranty. Consult your Niles dealer,  
or receiver/amplifier manufacturer, if you are uncertain about  
the power rating of your receiver or amplifier.  
• 1/8" Standard  
Slotted Screwdriver  
• Wire Stripper  
IMPORTANT: DO NOT USE THE SVL-6 W ITH AMPS OR  
RECEIVERS RATED AT MORE THAN 10 0 W ATTS PER  
CHANNEL RMS AT 8 OHMS.  
IMPORTANT  
DO NOT use the  
SVL-6 with amps  
or receivers rated  
at more than 100  
watts per channel  
RMS at 8 ohms.  
Am plifier Im pedance Load  
As m ore pairs of speakers are parallel connected to a  
receiver or am p lifier, th e overall system im p ed an ce  
becom es lower. For exam ple, if two pairs of 8-ohm  
speakers are connected in parallel, the impedance will be  
4 ohms; two pairs of 4-ohm speakers in parallel become 2  
ohms, and so on.  
Most receivers or amplifiers are not rated for use below a 4  
ohm load. Most manufacturers do not recommend connect-  
ing more than two pairs of speakers without using some  
form of impedance correction.  
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The SVL-6 includes impedance correction circuitry which  
protects your receiver or amplifier from low impedance  
loads. The circuitry assures that your receiver or amplifier will  
see a safe operating load, even when all six speaker pairs are  
playing at the same time.  
The actual impedance load the SVL-6 presents to your receiv-  
er or amplifier will vary, depending on how many speaker  
pairs are playing, and the impedance rating of each speaker.  
If you have six pairs of 8-ohm speakers playing, the SVL-6 will  
present a 4.3 ohm impedance load to your receiver/amplifier.  
With six pairs of 4-ohm speakers playing, the load drops to  
slightly under 4 ohms.  
If you intend to use the SVL-6 with more than two pairs of  
4-ohm speakers, it is recommended that you verify that the  
receiver or amplifier is capable of driving a 4-ohm load.  
Consult your Niles dealer, or the receiver/amplifier manu-  
facturer, if you are uncertain about the capabilities of the  
receiver/amplifier.  
Type of Speaker Wire  
For most applications, we recommend you use 16 or 18  
gauge stranded copper speaker wire for the SVL-4 connec-  
tions. For wiring runs longer than 80 feet, 14 gauge wire is  
recommended. Using speaker wire larger than 14 gauge for  
the SVL-6 connections is not recommended —the wire may  
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not fit into the connectors. Never use solid-core, aluminum,  
or "Romex" type wire with the SVL-6. When running speaker  
wires inside walls, most states and municipalities in the U.S.  
specify that you must use a special type of speaker wire.  
Usually, the requirement is that the wire that has a specific  
"CL" fire rating, such as "CL-2" or "CL-3". Consult your Niles  
dealer, building contractor, or local building and inspection  
department if unsure about which type of wire is best for  
your application.  
"TECH TIP"  
Wire size is  
expressed by it's  
AWG (American  
Wire Gauge)  
number. The lower  
the AWG number,  
the larger the wire,  
i.e., 12 AWG wire is  
physically larger  
than 14 AWG.  
Avoiding Int erference  
Speaker wires can act as an antenna for electrical noise.  
Locating speaker wires too close to a light dimmer or switch  
may cause a "buzzing" or "popping" sound to be heard  
though the speakers. If you must locate the SVL-6 wiring near  
electrical devices, route the speaker wires several feet away  
from the electrical wiring.  
Using t he SVL-6 wit h Tube-Type Am plifiers  
Virtually all tube amplifiers must have a load connected at all  
times. If the amplifier to be connected to the SVL-6 is a tube  
amplifier, be sure to always have at least one pair of speakers  
switched on at all times. An alternative is to permanently  
connect a 150 ohm, 5 watt resistor across the tube amplifier's  
output in parallel with the SVL-6. See (Fig ure 1) on next  
page for hookup diagram.  
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Tube Amplifier  
Figure 1  
Using a  
Tube Amplifier  
150  
150  
Niles SVL-6  
AMPLIFIER  
L- R-  
SPEAKER  
6
SPEAKER  
5
SPEAKER  
4
SPEAKER  
3
SPEAKER  
2
SPEAKER  
1
L+  
R+  
L+  
L-  
R-  
R+  
L+  
L
-
R
-
R+  
L+  
L
-
R
-
R+  
L+  
L-  
R-  
R+  
L+  
L
-
R
-
R+  
L+  
L-  
R-  
R+  
ON OFF  
N
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CONSTANT  
PROTECTION  
Niles Audio  
Corporation, Inc.  
Miami, Florida USA  
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12 position volume control  
provides greater attenuation  
than conventional 10 position  
designs.  
Recessed  
areas for  
custom room  
labels.  
SVL-6 SPEAKER SELECTION/ VOLUME CONTROL SYSTEM  
PROTECTION  
Attractive  
low-profile  
design.  
N
I
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E
S
1
2
3
4
5
6
Simple  
push-button  
operation.  
Connect up to six pairs  
of speakers.  
Protection switch safeguards your  
receiver or amplifier even with all  
6 pairs of speakers playing.  
AMPLIFIER  
L- R-  
SPEAKER  
6
SPEAKER  
5
SPEAKER  
4
SPEAKER  
L-  
3
SPEAKER  
2
SPEAKER  
1
L+  
R+  
L+  
L
-
R
-
R+  
L+  
L
-
R
-
R+  
L+  
L
-
R
-
R+  
L+  
R-  
R+  
L+  
L
-
R
-
R+  
L+  
L
-
R
-
R+  
ON OFF  
N
I
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E
S
CONSTANT  
PROTECTION  
Niles Audio  
Corporation, Inc.  
Miami, Florida USA  
Constant  
Two-piece  
removable  
connectors.  
Impedance  
Protection  
Switch  
8
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Inst allat ion  
1. Select a convenient location for the SVL-6.  
2. Run all the necessary wiring to the SVL-6. Label the wires  
for future reference. See (Figure 2).  
Receiver  
Figure 2  
Wiring Diagram  
Niles SVL-6  
Speaker  
Pair 6  
Speaker  
Pair 5  
Speaker  
Pair 4  
Speaker  
Pair 3  
Speaker  
Pair 2  
Speaker  
Pair 1  
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3. Make the connections to the SVL-6. The amplifier/speaker  
connectors on the SVL-6 are removable. If you wish, you may  
remove the SVL-6's connectors to facilitate installation [see  
(Fig ure 3)]. Strip 3/8" of insulation from the end of each  
wire. Tightly twist the end of each wire until there are no  
frayed ends. Insert each wire into the appropriate hole on the  
connector terminals. Be certain that proper phasing is  
observed —connect the positive terminals on the SVL-6 to  
the positive terminals on the amplifier and speakers and the  
negative terminals on the SVL-6 to the negative terminals on  
the amplifier and speakers. Re-install the connectors if they  
were removed. See (Figure 4).  
4. Locate the pre-printed Room Labels. Affix the appropriate  
label to the recessed area over each ON/OFF selector button.  
Figure 4  
Installing the Connectors  
Figure 3  
Removing the Connectors  
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Op erat ion  
There are two ways to use the SVL-6. You may play and  
adjust the volume of one pair of speakers at a time, or play  
multiple pairs simultaneously.  
"TECH TIP"  
If your amplifier or  
receiver has "A"  
and "B" speaker-  
pair outputs,  
If you intend to play more than one pair of speakers at the  
same time, you will need to become familiar with the oper-  
ation of the SVL-6's PROTECTION button.  
connect the SVL-6  
to the "A" outputs.  
Do not connect  
anything to "B".  
This will prevent  
the amplifier or  
receiver from  
Playin g On e Pair of Sp eakers At a Tim e  
1. Make sure the amplifier or receiver power is OFF and set  
the volume to minimum.  
2. Set the SVL-6 volume control for the speaker pair you  
wish to play to maximum (fully clockwise).  
driving an  
3. Locate the ON/OFF button on the SVL-6 which corre-  
sponds to the speaker pair you wish to play. Set it to the  
ON position.  
unusually low  
impedance load.  
4. Turn on the amplifier or receiver and select as source,  
such as the tuner or CD player.  
5. Slowly turn up the amplifier or receiver volume and set it  
to a comfortable (not maximum) listening level. Be careful  
not to overdrive or "clip" your am plifier. If the sound  
becomes muddy or distorted, you have reached the limit of  
your amplifier's volume capability and should quickly reduce  
the volume to avoid damaging your speakers.  
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6. Using the appropriate volume control on the front of  
the SVL-6, adjust the volume of the speakers to the desired  
listening level.  
7. You can turn off the speakers by turning the appropri-  
ate volume control on the SVL-6 fully counter-clockwise  
or by pressing the ON/OFF button.  
"TECH TIP"  
You will need to  
activate the SVL-6's  
PROTECTION button  
whenever the  
overall system  
impedance might  
fall below  
P la yin g  
Tw o  
o r  
M o r e  
Sp e a k e r  
P a ir s  
Sim ult an eously  
1. Make sure the amplifier or receiver power is OFF and  
set the volume to minimum.  
4 ohms.  
2. On the right side of the SVL-6's front panel is a button  
labeled PROTECTION. This button activates the SVL-6's  
impedance correction circuitry. The circuitry assures that  
your receiver or amplifier will see a safe operating load  
when playing multiple speaker pairs simultaneously. Since  
most receivers and amplifiers are not rated for use below a  
4 ohm load, you will need to activate the PROTECTION  
button whenever the overall system impedance might fall  
below 4 ohms. Use the following chart as a guide for set-  
ting the PROTECTION button.  
WHEN PLAYING THE FOLLOWING :  
1 or 2 pair of 8-ohm speakers  
OFF  
ON  
OFF  
ON  
ON  
3 or more pairs of 8-ohm speakers  
1 pair of 4-ohm speakers  
2 or more pairs of 4-ohm speakers  
Any combination of 4 and 8 ohm speakers  
Set t he PROTECTION but t on t o t he correct posit ion using t he chart shown above.  
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3. Set the SVL-6 volume controls which correspond to the  
speaker pairs you wish to play to maximum.  
4. Locate the appropriate ON/OFF buttons on the SVL-6. Set  
them to the ON position.  
5. Turn on the amplifier or receiver and select as source, such  
as the tuner or CD player.  
6. Slowly turn up the amplifier or receiver volume and set it to  
a comfortable (not maximum) listening level. Be careful not to  
overdrive or "clip" your amplifier. If the sound becomes  
muddy or distorted, you have reached the limit of your ampli-  
fier's volume capability and should quickly reduce the volume  
to avoid damaging your speakers.  
7. Using the appropriate volume controls on the front of the  
SVL-6, adjust the volume of the speakers to the desired listen-  
ing level.  
8. You can turn off the speakers by turning the corresponding  
volume controls on the SVL-6 fully counter-clockwise, or by  
pressing the appropriate ON/OFF button. Refer to the  
Protection chart for the correct setting of the PROTECTION  
button.  
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SPECIFICATIONS  
Const ant Prot ect ion Swit ch  
Audio Power  
The SVL-6 is equipped with a manual override for the protec-  
tion circuit that enables you to defeat the front panel protec-  
tion switch and maintain constant impedance protection. This  
will safeguard your amplifier from being overdriven due to  
accidental or improper use by anyone unfamiliar with the  
equipment.  
Handling  
100 watts/channel  
continuous music power  
Frequency Response  
+/- 1.2 dB from 20 Hz to  
20 kHz  
Mount ing  
Table-Top component  
To engage this override, move the rear panel "CONSTANT  
PROTECTION" switch to the "ON" position. Constant imped-  
ance protection will be maintained until the switch is turned  
to "OFF".  
Wiring Requirem ent s  
Individual runs of  
2-conductor speaker  
wire. Connectors  
Balancing Speaker Volum e  
accommodate wire sizes  
14-22 gauge (16 gauge  
recommended)  
The volume control on your receiver or amplifier serves as the  
"master" volume for all speaker pairs connected.  
Overall Dim ensions  
17" wide x 2" high x  
9-1/4" deep  
The volume level of the speakers may vary from room to  
room. This is caused by several factors. Two lesser factors are  
the size of the speaker and its efficiency. The largest factor is  
the physical size of the room.  
Weight  
8 3/4 lbs.  
The SVL-6's volume controls allow you to adjust the volume  
of each speaker pair individually. You can leave the amplifier  
or receiver volume set at one position and use the SVL-6 vol-  
ume controls exclusively.  
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NILES ®  
®
Niles Audio  
Corporation  
www.nilesaudio.com  
© 1999 Niles Audio Corporation. All rights reserved. Because Niles constantly strives to improve the  
quality of its products, Niles reserves the right to change product specifications without notice. Niles  
and the Niles logo are registered trademarks of Niles Audio Corporation. Printed in USA 4/96  
DS00096A  
12331 S.W. 130 Street  
Miami, Florida 33186  
Tel: (305) 238-4373  
Fax: (305) 238-0185  
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