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Introduction

The SVL-4 is a combination 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 protection 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 individually 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 ele-
ment. This assures minimal internal power dissipation with virtu-
ally no power wasted as heat.

TABLE OF CONTENTS

Introduction

1

Features and
Benefits         

Installation
Considerations 
4

Installation 

9

Operation        11

Specifications 14

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O N T R O L

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Y S T E M

SVL-4

Speaker
Selection/Volume
Control System

1

Summary of Contents for SVL-4

Page 1: ...SVL 4 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 NILES M O D E L SVL 4 SPEAKER SELECTION VOLUME CONTROL SYSTEM SVL 4...

Page 2: ...for the SVL 4 is individually 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 location...

Page 3: ...n instead of the usual 20 or 30 dB POP FREE switching between all steps Pre printed Room Labels are included for easy identification of speaker ON OFF buttons Isolated left and right channel ground re...

Page 4: ...lly and acoustically for frequency response distortion and power handling Standard 17 width allows the SVL 4 to stack neatly with other standard size components May be used with 4 6 or 8 ohm speaker s...

Page 5: ...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 im...

Page 6: ...f you intend to use the SVL 4 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 o...

Page 7: ...cating 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 4 wiring near electrical devices route the sp...

Page 8: ...R O L S Y S T E M Figure 1 Using a Tube Amplifier Tube Amplifier Niles SVL 4 150 150 AMPLIFIER L L R R L L R R L L R R L L R R L L R R SPEAKER 4 SPEAKER 3 SPEAKER 2 SPEAKER 1 CONSTANT PROTECTION ON OF...

Page 9: ...ON OFF Niles Audio Corporation Inc Miami Florida USA NILES 12 position volume control provides greater attenuation than conventional 10 position designs Recessed areas for custom room labels Attractiv...

Page 10: ...P E A K E R S E L E C T I O N V O L U M E C O N T R O L S Y S T E M TUNER 94 9 15 AMPLIFIER L L R R L L R R L L R R L L R R L L R R SPEAKER 4 SPEAKER 3 SPEAKER 2 SPEAKER 1 CONSTANT PROTECTION ON OFF N...

Page 11: ...inals Be certain that proper phasing is observed connect the positive terminals on the SVL 4 to the positive terminals on the amplifier and speakers and the negative terminals on the SVL 4 to the nega...

Page 12: ...s to the speaker pair you wish to play Set it to the ON position 4 Turn on the amplifier or receiver and select a source such as the tuner or CD player 5 Slowly turn up the amplifier or receiver volum...

Page 13: ...when playing multi ple 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 over all...

Page 14: ...able 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 amplifier s volume capability and should...

Page 15: ...or amplifier serves as the master volume for all speaker pairs connected The volume level of the speakers may vary from room to room This is caused by several factors Two lesser factors are the size...

Page 16: ...0185 NILES 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 n...

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