Niles Audio SVL-4AB Stereo System User Manual
Contents
1. SV L 4ABP VL TAD SPEAKER SELECTION VOLUME CONTROL SYSTEM WITH A B AMPLIFIER INPUTS R NILES INSTALLATION amp OPERATION GUIDE SPEAKER SVL 4AB Speaker Selection Volume Control System with A B Amplifier Inputs TABLE OF CONTENTS Introduction 1 Features and Benefits Installation Considerations 4 Installation 9 Operation 11 Specifications 14 MLE CTION VOLUME CONTROL SYSTEM Introduction SVL 4AB is a combination speaker selector and volume controller The unit allows you to connect up to four pairs of speakers to your stereo receiver or amplifier and adjust the volume of each pair independently You can choose to listen to any one pair any combination of pairs or all pairs at once Additionally you can connect two different stereo receivers to the SVL 4AB by using its A and B amplifier inputs You don t have to worry about overloading either amplifier The SVL 4AB has individual protection circuits that keep both of your amplifiers running safely with any combi nation of speakers and amplifiers A perfect application for the SVL 4AB is individually control ling speaker ON OFF and volume adjustment for four pairs of speakers connected to two receivers Different family members can simultaneously listen to different musical selec tions through any of the four pairs of speakers The SVL 4AB adjusts the amplifiers signal with volume con trols that use autoformers not L pads2. 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 TOOLS REQUIRED e 1 8 Standard Slotted Screwdriver Wire Stripper DO NOT use the SVL 4AB with amps or receivers rated at more than 100 watts per channel RMS at 8 ohms SPEAKER SELECTION VOLUME CONTROL SYSTEM TECH 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 The SVL 4AB includes impedance correction circuitry which protects each of your receivers or amplifiers from low imped ance loads The circuitry assures that both of your receivers or amplifiers will recognize a safe operating load even when one amplifier is playing all four soeaker pairs at the same time The actual impedance load the SVL 4AB presents to each of your receivers or amplifiers will vary depending on how many speaker pairs are playing and the impedance rating of each speaker If you have four pairs of 8 ohm speak
3. The autoformers assures that virtually no power will be wasted as heat by the volume control SPEAKER SELECTION VOLUME CONTROL SYSTEM Features and Benefits The SVL 4AB offers a number of improvements over other speaker selector volume controllers e Amplifier Switching The SVL 4AB provides amplifier switching for each pair of speakers The switches are break before make and simultaneously switch both grounds and hots This allows any two amplifiers to safely and reliably operate simultaneously e The SVL 4AB uses 12 position POP FREE volume controls which are superior to 10 position designs You get a broader range of adjustment there are 10 steps of atten uation 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 e Greater dynamic range you get 42 dB of total attenua tion instead of the usual 20 or 30 dB e Pre printed Room Labels are included for easy identification of speaker ON OFF buttons e Isolated left and right channel ground retums make the SVL 4AB compatible with all types of amplifiers TECH SUPPORT HOTLINE If you have questions regarding the operation of the Niles SVL 4AB con tact your local Niles dealer or Niles Customer Service at 1 800 289 4434 SPEAKER SELECTION VOLUME CONTROL SYSTEM Rear panel switches for constant or selectable impedance protection for each amplifier You can use const
4. F NILES Niles Audio Corporation Inc Miami Florida USA Constant Impedance Protection Switches for each amplifier Protection switch safeguards both of your receivers or amplifiers even with one amplifier playing all 4 pairs of speakers SPEAKER 1 L L R R L L R R H U H H SPEAKER 4 SPEAKER 3 SPEAKER 2 L L R R L L R R LI LI H LI E Hu Two piece removable connectors SPEAKER SELECTION VOLUME CONTROL SYSTEM Installation 1 Select a convenient location for the SVL 4AB 2 Run all the necessary wiring to the SVL 4AB Label the wires for future reference See Figure 2 Figure 2 C3 TUNER 949 Wiring Diagram 15 ul lu cx c Receiver A ILES io Corporation Niles SVL 4AB Speaker Speaker Speaker Speaker Pair 4 Pair 3 Pair 2 Pair 1 SPEAKER SELECTION VOLUME CONTROL SYSTEM 3 Make the connections to the SVL 4AB The amplifier speaker connectors on the SVL 4AB are removable If you wish you may remove the SVL 4AB s connectors to facilitate installation see Figure 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 prop
5. a buzzing or popping sound to be heard though the speakers If you must locate the SVL 4AB wiring near electrical devices route the speaker wires several feet away from the electrical wiring Using the SVL 4AB with Tube Type Amplifiers Virtually all tube amplifiers must have a load connected at all times If one of the amplifiers to be connected to the SVL 4AB is a tube amplifier be sure to always have at least one pair of speakers switched on at all times An alternative is to perma nently connect a 150 ohm 5 watt resistor across the tube amplifiers output in parallel with the SVL 4AB See Figure 1 on next page for a hookup diagram SPEAKER SELECTION VOLUME CONTROL SYSTEM Tube Amplifier Figure 1 Using a Tube Amplifier L L R R L L R R HA H Hl H HH EB BI I IB B B B Ra RA MA 52 Ra RA MO RJ SPEAKER Recessed areas for custom room labels Each speaker pair can individu ally select one of two source amplifiers with a dedicated push button A B switch AMPLIFIER A Lt LO RO RE SELECTION VOLUME 12 position volume control provides greater attenuation than conven tional 10 position designs CONTROL SYSTEM Attractive low profile design PROTECTION AMPLIFIER B L L R Each speaker pair is independently activated with a simple pushbutton On Off switch R CONSTANT PROTECTION LI H LI ON OFF ON OF
6. ant protec tion on one of your two amplifiers and manual protection for the other Self cleaning silver plated switch contacts assure many years of trouble free use 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 4AB 100 tested electronically and acoustically for frequency response distortion and power handling Standard 17 width allows the SVL 4AB 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 Power handling 100 watts channel continuous music power Frequency response 20 Hz to 20 kHz 4 1 2 dB Ten year parts and labor warranty Proudly made in the USA SPEAKER SELECTION VOLUME CONTROL SYSTEM Installation Considerations SVL 4AB Power Handling The SVL 4AB is designed for use with receivers or amplifiers having a maximum power output of 100 watts per channel at 8 ohms Damage caused by the use of higher power receivers or amplifiers will void the warranty Consult your Niles dealer or receiver amplifier manufacturer if you are uncertain about the power rating of your receivers or amplifiers IMPORTANT DO NOT USE THE SVL 4AB WITH AMPS OR RECEIVERS RATED AT MORE THAN 100 WATTS PER CHANNEL RMS AT 8 OHMS Amplifier Impedance Load
7. er phasing is observed To achieve proper phasing connect the positive terminals on the SVL 4AB to the positive terminals on the amplifiers and speakers and the negative terminals the SVL 4AB to the negative terminals on the amplifiers and speakers If you are using only one amplifier it should be connected to the Amplifier A connector and the pushbutton switches marked A B should be left out or in the A position If you will be using two amplifiers connect the second amplifier to the Amplifier B connector on the SVL AAB 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 3 Removing the Connectors Figure 4 Installing the Connectors SPEAKER SELECTION VOLUME CONTROL SYSTEM TECH TIP If your amplifier or receiver has A speaker pair outputs connect the SVL 4AB to the A outputs Do not connect anything to B This will prevent the amplifier or receiver from driving an unusually low impedance load Operation The are two ways to use the SVL 4AB You may play and adjust the volume of one pair of speakers at a time or play multiple pairs simultaneously If you intend to play more than one pair of speakers at the same time you will need to become familiar with the opera tion of the SVL 4AB s PROTECTION button Playing One Pair of S
8. ers play ing from one of your receivers amplifiers the SVL 4AB will present a 4 5 ohm impedance load to it With four pairs of 4 ohm speakers playing the load drops to slightly under 4 ohms It is recommended that you use the SVL 4AB with receivers or amplifiers that are capable of driving a 4 ohm load Consult your Niles dealer or the receiver amplifier manufac turer 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 4AB connec tions For wiring runs longer than 80 feet 14 gauge wire is recommended Using speaker wire larger than 14 gauge for the SVL 4AB connections is not recommended the wire SPEAKER SELECTION VOLUME CONTROL SYSTEM may not fit into the connectors Never use solid core alu minum or Romex type wire with the SVL 4AB When run ning 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 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 Avoiding Interference Speaker wires can act as an antenna for electrical noise Locating speaker wires too close to a light dimmer or switch may cause
9. g the corresponding amplifier A B button Constant Protection Switches The SVL 4AB is equipped with rear panel overrides of the protection circuits that enables you to maintain constant impedance protection regardless of the position of the front panel switch This will safeguard either or both of your ampli fiers from being overdriven due to accidental or improper use by anyone unfamiliar with the equipment To engage one or both of these overrides move the rear panel CONSTANT PROTECTION switches to the ON pos tion Constant impedance protection will be maintained until the switches are tumed to OFF SPECIFICATIONS Audio Power Handling 100 watts channel continuous music power Frequency Response 1 2 dB from 20 Hz to 20 kHz Mounting Table Top component Wiring Requirements Individual runs of 2 conductor speaker wire Connectors accommodate wire sizes 14 22 gauge 16 gauge recommended Overall Dimensions 17 432mm wide x 2 51mm high x 9 1 4 235mm deep Weight 7 1 2 Ibs 3 4 kg NILES Niles Audio Corporation www nilesaudio com 12331 S W 130 Street Miami Florida 33186 Tel 305 238 4373 Fax 305 238 0185 1999 Niles Audio Corporation All rights reserved Because Niles believes in constantly improving its products Niles reserves the right to change product specifications without notice Niles and the Niles logo are registered trademarks of Niles Audio Corporati
10. me controls to minimum 2 On the right sde of the SVL 4AB s front panel is a button labeled PROTECTION This button activates the SVL 4AB s impedance correction circuitry The circuitry assures that both of your receivers or amplifiers 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 TECH TIP You will need to activate the SVL 4AB s PROTECTION button whenever the overall system impedance might fall below SPEAKER When playing the following speakers SELECTION VOLUME CONTROL SYSTEM The Protection button should be 1 or 2 pair of 8 ohm speakers 3 or 4 pairs of 8 ohm speakers 2 3 or 4 pairs of 4 ohm speakers T pair of ohm speakers Any combination of 4 and 8 ohm speakers Set the PROTECTION button to the correct position using the chart shown above TECH TIP The volume control of your amplifier or receiver acts as the master volume for all of your speaker pairs Set this control to a comfortable not maximum listening level Be careful not to overdrive or clip your amplifier If you hear distortion from your speakers reduce the volume of your amplifier to avoid damaging your speakers 3 Set the SVL 4AB volume contr
11. ols which correspond to the speaker pairs you wish to play to maximum fully clockwise 4 Locate the appropriate ON OFF buttons on the SVL 4AB Set them to the ON position 5 Adjacent to the ON OFF buttons are the amplifier A B but tons Choose an amplifier for each active speaker pair by pressing the A B button in for B and out for A 6 Tum on the amplifiers or receivers and select a source such asthe tuner or CD player 7 Slowly tum up each of the amplifiers or receivers 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 amplifier s volume capability and should quickly reduce the volume to avoid damaging your speakers 8 Using the appropriate volume controls on the front of the SVL AAB adjust the volume of the speakers to the desired lis tening level The volume control of your receiver or amplifier acts as the master volume for all of your speaker pairs SPEAKER SELECTION VOLUME CONTROL SYSTEM 9 You can tum off the speakers by tuming the correspond ing volume controls on the SVL 4AB fully counter clockwise or by pressing the appropriate ON OFF button Refer to the Protection Chart located on page 13 for the correct setting of the PROTECTION button 10 At any time you may choose to switch any of the active speaker pairs to one or the other of the amplifiers by pressin
12. on Printed in USA 1 99 DS00127A
13. peakers At a Time 1 Make sure the amplifier or receiver power is OFF and set the volume to minimum 2 Set the SVL 4AB volume control for the speaker pair you wish to play to maximum fully clockwise 3 Locate the ON OFF button on the SVL 4AB which corre sponds to the speaker pair you wish to play Set it to the ON position 4 Adjacent to the ON OFF button is the amplifier A B but ton Choose an amplifier for the active speaker pair by press ing the A B button in for B and out for A 5 Turn on the amplifier or receiver and select a 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 SPEAKER SELECTION VOLUME CONTROL SYSTEM 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 quickly reduce the volume to avoid damaging your speakers 7 Using the appropriate volume control on the front of the SVL 4AB adjust the volume of the speakers to the desired lis tening level 8 You can turn off the speakers by tuming the appropriate volume control on the SVL 4AB fully counter clockwise or by pressing the ON OFF button 9 You can switch to the other amplifier by pressing the amplifier A B button Playing Two or More Speaker Pairs Simultaneously 1 Make sure both of the amplifiers are OFF and set the vol u
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