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Niles Audio SPS-4 - page 1
SPS - 4 INSTALLATION & OPERA TION GUIDE N I LES ® MODEL SPS-4 SPEAKER SEL ECTION SYSTEM SPS - 4 ...
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Niles Audio SPS-4 - page 2
Introduction The SPS-4 allows you to connect up to four pairs of speakers 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 ...
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Niles Audio SPS-4 - page 3
Features and Benefits The SPS-4 offers a number of improvements over other speaker selectors: ● Pre-printed Room Labels are included for easy identification of speaker ON/OFF buttons. ● Isolated left and right channel ground returns make the SPS-4 compatible with all types of amplifiers. ● Self-cleaning, silver-plated switch contacts assure m ...
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Niles Audio SPS-4 - page 4
● May be used with 4, 6, or 8-ohm speaker systems. ● Ideal for both home and commercial sound installations. ● Only a wire stripper is required for installation. ● Power handling: 1 00 watts/channel continuous music power. ● Frequency response: Flat ( + 0 dB, - 0 dB) from 20 Hz to 20 kHz. ● Ten year parts and labor warranty. ● Proudly ...
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Niles Audio SPS-4 - page 5
Installation Considerations SPS-4 Power Handling The SPS-4 is designed for use with a receiver or amplifier hav- 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. Consul ...
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Niles Audio SPS-4 - page 6
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 ...
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Niles Audio SPS-4 - page 7
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 u ...
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Niles Audio SPS-4 - page 8
7 S PEAKER S ELECTION S YSTEM Figure 1 Using a Tube Amplifier Tube Amplifier Niles SPS-4 15 0 15 0 SPEAKER 2 SPEAKER 1 SPEAKER 3 SPEAKER 4 LR AMPLI FIE R LR LR ++ -- ++ -- LR LR ++ -- Niles Audio Corporat ion, Inc. Miam i, Florida US A NI LES ...
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Niles Audio SPS-4 - page 9
8 S PEAKER S ELECTION S YSTEM SPS-4 SPEAK ER SE L EC TION S YSTEM PROTECT ION 13 24 NI LES SPEAKER 2 SPEAKER 1 SPEAKER 3 SPEAKER 4 LR AMPLIFIER LR LR ++ -- ++ -- LR LR ++ -- Niles Audio Corporat ion, Inc. Miami, Flori da USA NI LES Recessed areas for custom room labels. Attractive low-profile design. Simple push-button ...
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Niles Audio SPS-4 - page 10
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). 9 S PEAKER S ELECTION S YSTEM TUNER 94.9 15 SPEAKER 2 SPEAKER 1 SPEAKER 3 SPEAKER 4 LR AMPLIFIER LR LR ++ -- ++ -- LR LR ++ -- Niles Audio Corporat ion, Inc. Miami, Florida USA N ...
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Niles Audio SPS-4 - page 11
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 posit ...
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Niles Audio SPS-4 - page 12
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 Speakers At a Time 1. Make sure the ...
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Niles Audio SPS-4 - page 13
Playing Two or More Speaker Pairs Simultaneously 1. Make sure the amplifier or receiver power is OFF and set the volume to minimum. 2. On the right side of the SPS-4's front panel is a button labeled PROTECTION. This button activates the SPS-4's imped- ance correction circuitry. The circuitry assures that your receiv- er or amplifier will ...
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Niles Audio SPS-4 - page 14
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 ove ...
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Niles Audio SPS-4 - page 15
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 ...
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Niles Audio SPS-4 - page 16
Niles Audio Corporation www.nilesaudio.com 1 2331 S. W . 1 30 Street Miami, Florida 33 1 86 T el: (305) 238-43 73 Fax: (305) 238-0 1 85 ® NIL E S ® © 1 999 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 ...
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