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MODEL
SPS-4
SPS-4
SPS-4
SPEAKER SELECTION SYSTEM
NILES ®
INSTALLATION & OPERATION GUIDE
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S P EAKER S ELECTION S YSTEM SPS-4 Speaker Selection System TABLE OF CONTENTS Introduction The SPS-4 allows you to connect up to four pairs of speakers Introduction 1 to your stereo receiver or amplifier and play any pair, any combination of pairs, or all pairs simultaneously. You don't Features and have to worry about overloading your amplifier. The SPS-4 Benefits 2 has a protection circuit that keeps your amplifier running safely, even if you have all four pairs of speakers playing at Inst
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S PEAKER S ELECTION S YSTEM Features and Benefits The SPS-4 offers a number of improvements over other speaker selectors: l Pre-printed Room Labels are included for easy identification of speaker ON/OFF buttons. TECH SUPPORT l Isolated left and right channel ground returns make the HOTLINE SPS-4 compatible with all types of amplifiers. If you have questions regarding l Self-cleaning, silver-plated switch contacts assure many the operation of the years of trouble-free use. Niles SPS-4, contact yo
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S PEAKER S ELECTION S YSTEM l May be used with 4, 6, or 8-ohm speaker systems. l Ideal for both home and commercial sound installations. l Only a wire stripper is required for installation. l Power handling: 100 watts/channel continuous music power. + - l Frequency response: Flat( 0dB, 0dB) from 20Hz to20kHz. l Ten year parts and labor warranty. l Proudly made in the USA. 3
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S PEAKER S ELECTION S YSTEM 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 • Wire Stripper 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 pow
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S PEAKER S ELECTION S YSTEM 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
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S PEAKER S ELECTION S YSTEM 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
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S PEAKER S ELECTION S YSTEM Tube Amplifier Figure 1 Using a Tube Amplifier 150 150 Niles SPS-4 AMPLIFIER SPEAKER 4 SPEAKER 3 SPEAKER 2 SPEAKER 1 ++++++ N
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S PEAKER S ELECTION S YSTEM Recessed areas for custom room SPS-4 SPEAKER SELECTION SYSTEM labels. PROTECTION Attractive low-profile N
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1324 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 SPEAKER 4 SPEAKER 3 SPEAKER 2 SPEAKER 1 ++++++ N
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S PEAKER S ELECTION S YSTEM 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 TUNER 94.9 Figure 2 15 Wiring Diagram Niles SPS-4 AMPLIFIER SPEAKER 4 SPEAKER 3 SPEAKER 2 SPEAKER 1 ++++++ N
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S PEAKER S ELECTION S YSTEM 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—connect 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
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S PEAKER S ELECTION S YSTEM Operation There are two ways to use the SPS-4. You may play one pair "TECH TIP" of speakers at a time, or play multiple pairs simultaneously. If your amplifier or If you intend to play more than one pair of speakers at the receiver has "A" and "B" speaker- same time, you will need to become familiar with the opera- pair outputs, tion of the SPS-4's PROTECTION button. connect the SPS-4 to the "A" outputs. Playing One Pair of Speakers At a Time Do not connect 1. Make
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S PEAKER S ELECTION S YSTEM Playing Two or More Speaker Pairs Simultaneously 1. Make sure the amplifier or receiver power is OFF and set "TECH TIP" the volume to minimum. You will need to 2. On the right side of the SPS-4's front panel is a button activate the SPS-4's 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
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S PEAKER S ELECTION S YSTEM 3. Locate the ON/OFF buttons on the SPS-4 which corre- spond to the speaker pairs you wish to play. Set them 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 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 v
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S PEAKER S ELECTION S YSTEM Balancing Speaker Volume SPECIFICATIONS The volume control on your receiver or amplifier serves as Audio Power Handling the "master" volume for all speaker pairs connected. 100 Watts/channel continuous music power The volume level of the speakers may vary from room to room. This is caused by several factors. Two lesser factors are Frequency Response the size of the speaker and its efficiency. The largest factor is + - 0 dB, 0 dB (flat) from the physical size of the r
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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, 12331 S.W. 130 Street and the Niles logo are registered trademarks of Niles Audio Corporation. Printed in USA 4/96 DS00097A Miami, Florida 33186 Tel: (305) 238-4373 Fax: (305) 238-0185
