Niles Audio SVL-4 Owner's Manual
SVL-4
INSTALLATION & OPERATION GUIDE
NILES
®
MODEL
SVL-4
SPEAKER SELECTION/VOLUME CONTROL SYSTEM
SVL-4
Introduction
The SVL-4 is a combinati on speaker selector and volume
controller. It allows you to connect four pairs of speakers to
your stereo receiver or amplifier and adjust the volume of
each pair independently. Additionally, you can choose to
listen to any one pair, any combination of pairs, or all pairs at
once. You don't have to worry about overloading your
amplifier. The SVL-4 has a protecti on circuit that keeps your
amplifier running safely, even with all four pairs of speakers
playing at the same time.
A perfect application for the SVL- 4 is individuall y controlling
speaker "ON/OFF" and volume adjustment for four pairs of
speakers: one pair in the room with the main stereo system
and three additional pairs in remote locations.
The SVL-4 adjusts the volume of the speakers connected to it
by attenuating the amplifier signal. Niles volume controls use
autoformers instead of L-pads for the volume controlling element. This assures minimal internal power dissipation with virtually no power wasted as heat.
TABLE OF CONTENTS
Introduction 1
Features and
Benefits 2
Installation
Considerations 4
Installation 9
Operation 11
Specifications 14
S
PEAKERSE LECTION/VOLUMECONTROLSYSTEM
SVL-4
Speaker
Selection/Volume
Control Sy stem
1
Features and Benefits
The SVL-4 offers a number of improvements over other
speaker selector/volume controllers:
● The SVL-4 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 1 2 is "full-on" and step 1 is "full-off".
● Greater dynamic range—you get 42 dB of total attenua-
tion instead of the usual 20 or 3 0 dB.
● POP-FREE switching between all steps.
● Pre-printed Room Labels are included for easy identification
of speaker ON/OFF buttons.
● Isolated l eft and right channel ground returns make the
SVL-4 compatible with all types of a mplifiers.
● Rear panel switch for constant or selectable impedance
protection.
● Self-cleaning, silver-pl ated switch contacts assure many
years of trouble free use.
2
S
PEAKERSELECTION/VOLUMECONTROLSYSTEM
TECH
SUPPORT
HOTLINE
If you have
questions regarding
the operation of the
Niles SPS-4, contact
your local Niles
dealer or Niles
Customer Service at
1-800-289-4434.
● 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-4.
● Removable connectors accommodate up to 14 gauge wire
or "pins", making the SVL-4 compatible with most "highdefinition" speaker cables.
● 100% tested, electronicall y and acoustically, for frequency
response, distortion and power handling.
● Standard 17" width allows the SVL-4 to stack neatl y 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.
3
S
PEAKERSELECTION/VOLUMECONTROLSYSTEM
Installation Considerations
SVL-4 Power Handling
The SVL-4 is desi gned for use with a receiver or amplifier
having 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.
IMPORTANT: DO NOT USE THE SVL-4 WITH AMPS OR
RECEIVERS RATED AT MORE THAN 100 WATTS PER CHANNEL RMS AT 8 OHMS.
Amplifier Impedance Load
As more pairs of speakers are parallel connected to a receiver
or amplifier, the overall system impedance becomes lower.
For example, 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
connecting more than two pairs of speakers without using
some form of impedance correction.
4
S
PEAKERSELECTION/VOLUMECONTROLSYSTEM
IMPORTANT
DO NOT use the
SVL-4 with amps
or receivers rated
at more than 100
watts per channel
RMS at 8 ohms.
TOOLS
REQUIRED
• 1/8" Standard
Slotted Screwdriver
• Wire Stripper
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