Niles Audio SPS-4 Speaker System User Manual
Contents
1. S PS 4 SPEAKER SELECTION SYSTEM A NILES SPS 4 Speaker Selection System TABLE OF CONTENTS Introduction 1 Features and Benefits Installation Considerations 4 Installation 9 Operation 11 Specifications 14 SPE AKER SELECTION SYSTEM Introduction The SPS 4 allows you to connect up to four pairs of soeakers to your stereo receiver or amplifier and play any pair any combination of pairs or all pairs simultaneously You don t have to worry about overloading your amplifier The SPS 4 has a protection circuit that keeps your amplifier running safely even if you have all four pairs of speakers playing at the same time SPEAKER SELECTION SYSTEM Features and Benefits The SPS 4 offers a number of improvements over other speaker selectors e Pre printed Room Labels are included for easy identification of speaker ON OFF buttons e Isolated left and right channel ground returns make the SPS 4 compatible with all types of amplifiers e Self cleaning silver plated switch contacts assure many years of trouble free use e Printed circuit board design assures high reliability e Spring loaded push terminal connectors accommodate up to 14 gauge wire or pins making the SPS 4 compatible with most high definition speaker cables e 10096 tested electronically and acoustically for frequency response distortion and power handling e Only 8 1 2 wide Match the width of 17 components by combining wit2. 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 5 To turn off the speaker pair simply press the correspond ing ON OFF button on the SPS A SPEAKER SELECTION SYSTEM Playing Two or More Speaker Pairs Simultaneously 1 Make sure the amplifier or receiver power is OFF and set x TECH TIP the volume to minimum You will need t 2 On the right side of the SPS 4 s front panel is a button e pe ae labeled PROTECTION This button activates the SPS 4 s imped PROTECTION button ance correction circuitry The circuitry assures that your receiv whenever the overall er or amplifier will see a safe operating load when playing mul system impedance tiple speaker pairs simultaneously Since most receivers and might fall below amplifiers are not rated for use below a 4 ohm load you will 4 ohms need to activate the PROTECTION button whenever the over all system impedance might fall below 4 ohms Use the follow ing chart as a guide for setting the PROTECTION button When playing the following speakers The Protection button should be OFF OFF Set the Protection button to the correct position using the chart shown above SPEAKER SELECTION SYSTEM 3 Locate the ON OFF buttons on the SPS 4 which corre soond to the speaker pairs you wish to play Set them to the ON position 4 Turn on the amplif
3. Response 0 dB 0 dB flat 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 8 1 2 wide x 2 high x 6 3 4 deep Weight 1 3 4 Ib NILES amp 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 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 DS00097A
4. tube amplifier s output in parallel with the SPS 4 See Figure 1 on next page for hookup diagram SPEAKER SELECTION SYSTEM Tube Amplifier Figure 1 Using a Tube Amplifier Corporation Inc Miami Florida USA SPEAKER SELECTION SYSTEM areas for custom room labels SPS 4 SPEAKER SELECTION SYSTEM Attractive A low profile NILES design Simple Connect up to four pairs Protection switch safeguards your push button of speakers receiver or amplifier even with all operation 4 pairs of speakers playing AMPLIFIER 5 SPEAKER4 p SPEAKER 3 5 SPEAKER 2 SPEAKER 1 NILES Niles Audio Corporation Inc Miami Florida USA Spring loaded push connectors SPEAKER SELECTION SYSTEM Installation 1 Select a convenient mounting location for the SPS 4 2 Run all the necessary wiring to the SPS 4 Label the wires for future reference See Figure 2 Receiver C3 TUNER TUNER 943 ln TUNER 943 O Figure 2 min Wiring Diagram CACXCACAEAXCAXCOICAICAICXCX YCQIC A r SPEAKER2 SPEAKER 1 4 Speaker Speaker P air 2 Pair 1 SPEAKER SELECTION SYSTEM 3 Make the connections to the SPS 4 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 spring loaded connector terminals Be certain that proper phasing is observed conn
5. ect the positive terminals on the SPS 4 to the positive terminals on the amplifier and speakers and the negative terminals on the SPS 4 to the negative terminals on the amplifier and speak ers See Figure 3 4 Locate the pre printed Room Labels Affix the appropriate label to the recessed area over each ON OFF selector button Figure 3 Connecting the Wires SPEAKER SELECTION SYSTEM TECH TIP If your amplifier or receiver has A and B speaker pair outputs connect the SPS 4 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 There are two ways to use the SPS 4 You may play 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 SPS 4 s PROTECTION button Playing One Pair of Soeakers At a Time 1 Make sure the amplifier or receiver power is OFF and set the volume to minimum 2 Locate the ON OFF button on the SPS 4 which corre sponds to the speaker pair you wish to play Set it to the ON position 3 Turn on the amplifier or receiver and select a source such as the tuner or CD player 4 Slowly tum 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
6. h another Niles 1 2 width product 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 SPEAKER SELECTION SYSTEM May be used with 4 6 or 8 ohm speaker systems e Ideal for both home and commercial sound installations e Only a wire stripper is required for installation e Power handling 100 watts channel continuous music power e Frequency response Hat 0 dB 0 dB from 20 Hz to 20 kHz e Ten year parts and labor warranty e Proudly made in the USA SPEAKER SELECTION SYSTEM Installation Considerations SPS 4 Power Handling TOOLS The SPS 4 is designed for use with a receiver or amplifier hav REQUIRED 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 Niles speaker selectors with higher power handling capabilities are available Consult your Niles dealer or receiver amplifier manufacturer if you are uncertain about the power rating of your receiver or amplifier Wire Stripper 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
7. ier or receiver and select a source such as the tuner or CD player 5 Slowly tum 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 amplifiers volume capability and should quickly reduce the volume to avoid damaging your speakers 6 To turn off one or more speaker pairs simply press the corresponding ON OFF button s on the SPS 4 Refer to the Protection chart for the correct setting of the PROTECTION button SPEAKER SELECTION SYSTEM Balancing Speaker Volume The volume control on your receiver 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 of the speaker and its efficiency The largest factor is the physical size of the room The best way to balance speaker volume is to equip each of the speaker pairs in your system with a Niles volume control The controls allow you to adjust the volume of each speaker pair individually If all the speaker pairs in your system are equipped with Niles volume controls you can leave the amplifier or receiver volume set at one position and use the Niles controls exclusively SPECIFICATIONS Audio Power Handling 100 Watts channel continuous music power Frequency
8. ou use 16 or 18 gauge stranded copper speaker wire for the SPS 4 connec tions For wiring runs longer than 80 feet 14 gauge wire is recommended Using speaker wire larger than 14 gauge for the SPS 4 connections is not recommended the wire may not fit into the connectors Never use solid core aluminum or Romex type wire with the SPS 4 When running speaker SPEAKER SELECTION SYSTEM 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 deal er 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 a buzzing or popping sound to be heard through the speakers If you must locate the SPS 4 wiring near electrical devices route the speaker wires several feet away from the electrical wiring Using the SPS 4 with Tube Type Amplifiers Virtually all tube amplifiers must have a load connected at all times If the amplifier to be connected to the SPS 4 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
9. 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 The SPS 4 includes impedance correction circuitry which pro tects your receiver or amplifier from low impedance loads SPEAKER SELECTION SYSTEM 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 The circuitry assures that your receiver or amplifier will see a safe operating load even when all four speaker pairs are playing at the same time The actual impedance load the SPS 4 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 four pairs of 8 ohm speakers playing the SPS 4 will present a 4 5 ohm impedance load to your receiver amplifier With four pairs of 4 ohm speakers playing the load drops to slightly under 4 ohms If you intend to use the SPS 4 with more than 2 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 receiver amplifier manufacturer if you are uncertain about the capabilities of the receiver amplifier Type of Speaker Wire For most applications we recommend y
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