Niles Audio Portable Speaker HPS 4 HPS 6 User Manual

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  
HPS-4/HPS-6  
HIGH POWER SPEAKER SELECTION SYSTEM  
Niles Audio  
Corporation  
©2004 Niles Audio Corporation. All rights reserved. Niles, the Niles logo and Blending High Fidelity and  
Architecture are registered trademarks of Niles Audio Corporation. Because we strive to improve our products,  
Niles reserves the right to change product specifications without notice. The technical and other information  
contained herein is not intended to set forth all technical and other specifications of Niles products. Additional  
China 1/04 DS00358ACN  
12331 S.W. 130 Street  
Miami, Florida 33186  
Tel: (305) 238-4373  
Fax: (305) 238-0185  
®
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3. Locate the on/off buttons on the HPS-4/HPS-6 which cor-  
respond to the speaker pairs you wish to play. Set them to  
the ON position (Engaged).  
Installation Considerations  
“TECH TIP”  
Power Handling  
You will need  
to activate the  
The HPS series is designed for use with a receiver or amplifier  
having a maximum power output of 250 watts per channel at  
8 ohms. Damage caused by the use of a higher-power receiv-  
er or amplifier will void the warranty. Consult your Niles deal-  
er, or receiver/amplifier manufacturer, if you are uncertain  
about the power rating of your receiver or amplifier.  
4. Turn on the amplifier or receiver and select a source, such  
as the tuner or CD player.  
HPS-4/HPS-6’s  
protection button  
whenever the overall  
system impedance  
might fall below  
4 ohms.  
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 volume capability and should quickly  
reduce the volume to avoid damaging your speakers.  
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 so on.  
Most receivers or amplifiers are not rated for use below a  
4 ohm load. Most manufacturers do not recommend con-  
necting more than two pairs of speakers without using some  
form of impedance correction.  
When playing the following speakers:  
1 or 2 pairs of 8-ohm speakers  
The Protection button should be:  
OFF  
ON  
OFF  
ON  
ON  
3 or more pairs of 8-ohm speakers  
1 pair of 4-ohm speakers  
The HPS series includes impedance correction circuitry which  
protects your receiver or amplifier from low impedance  
loads. 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.  
2 or more pairs of 4-ohm speakers  
Any combination of 4 and 8 ohm speakers  
Set the PROTECTION button to the correct position using the chart shown above.  
The actual impedance load the speaker selector presents to  
your receiver 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  
HPS-4/HPS-6 series will present a 4.5 ohm impedance load to  
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Figure3  
Removing the Connectors  
Using the HPS Series with Tube-Type Amplifiers  
Virtually all tube amplifiers must have a load connected at all  
times. If the amplifier to be connected to the HPS-4/HPS-6 is a  
tube amplifier, be sure to always have at least one pair of speak-  
ers switched on at all times. An alternative is to permanently  
connect a 150 ohm, 5 watt resistor across the tube amplifier’s  
output in parallel with the HPS-4/HPS-6. See (Figure 1).  
SPEAKER 4  
Installation  
1. Select a convenient mounting location.  
“Tech Tip”  
2. Run all the necessary. Label the wires for future reference.  
See (Figure 2).  
3. Make the connections to the speaker selector. The amplifi-  
er/speaker connectors on the HPS are removable. If you  
wish, you may remove the HPS’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 appro-  
priate hole on the connector terminals. Be certain that  
proper phasing is observed—connect the positive termi-  
nals on the HPS to the positive terminals on the amplifier  
and speakers and the negative terminals on the HPS to the  
negative terminals on the amplifier and speakers. Re-install  
the connectors if they were removed. See (Figure 4).  
Figure4  
Installing the Connectors  
SPEAKER AIRS  
Wire size is  
expressed by it’s  
AMPLIFIER  
AWG (American Wire  
Gauge) number. The  
lower the AWG num-  
ber, the larger the  
wire, i.e., 12 AWG  
wire is physically  
larger than 14 AWG.  
Insert the connector plug into the socket and lock in place-  
by tightening captive screws on each side of connector.  
4. Affix the appropriate label to the recessed area over each  
on/off selector button.  
5
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Tube Amplifier  
Recessed  
areas for  
custom room  
labels.  
HPS-4 HIGH POWER SPEAKER SELECTION SYSTEM  
Figure1  
PROTECTION  
Using a  
Attractive  
low-profile  
design.  
1
2
3
4
Tube Amplifier  
Simple  
push-button  
operation.  
Connect up to four pairs  
of speakers.  
Protection switch safeguards your  
receiver or amplifier even with  
all pairs of speakers playing.  
Niles HPS-4  
Niles Audio Corporation Miami, Florida USA  
Niles Audio Corporation Miami, Florida USA  
AMPLIFIER  
SPEAKER  
4
SPEAKER  
3
SPEAKER  
2
SPEAKER  
1
AMPLIIFIER  
SPEAKER 4  
SPEAKER  
3
SPEAKER 2  
SPEAKER 1  
ON OFF  
CONSTANT  
PROTECTION  
ON OFF  
CONSTANT  
PROTEECTION  
Constant  
Impedance  
Protection  
Switch  
Two-piece  
removable  
connectors.  
7
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Operation  
There are two ways to use the HPS-4/HPS-6. 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 PROTECTION button.  
Receiver  
Figure2  
Wiring Diagram  
Playing One Pair of Speakers At a Time  
1. Make sure the amplifier or receiver power is OFF and set  
the volume to minimum.  
TUNER 94.9  
15  
2. Locate the on/off button on the HPS-4/HPS-6 which corre-  
sponds to the speaker pair you wish to play. Set it to the  
ON position (Engaged).  
Niles HPS-4  
Niles Audio Corporation Miami, Florida USA  
AMPLIIFIER  
SPEAKER 4  
SPEAKER 3  
SPEAKER 2  
SPEAKER 1  
3. Turn on the amplifier or receiver and select a source, such  
as the tuner or CD player.  
ON OFF  
CONSTANT  
PROTECCTION  
4. 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 volume capability and should quickly  
reduce the volume to avoid damaging your speakers.  
Speaker  
Pair 4  
Speaker  
Pair 3  
Speaker  
Pair 2  
Speaker  
Pair 1  
5. To turn off the speaker pair, simply press the corresponding  
on/off button on the HPS-4/HPS-6.  
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Playing Two or More Speaker Pairs Simultaneously  
1. Make sure the amplifier or receiver power is OFF and set  
the volume to minimum.  
your receiver/amplifier. With six pairs of 4-ohm speakers  
playing, the load drops to slightly under 4 ohms.  
If you intend to use the HPS series 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, or receiver/amplifier manufacturer,  
if you are uncertain about the capabilities of the  
receiver/amplifier.  
“TECH TIP”  
Tools  
Required  
2. On the right side of the HPS-4/HPS-6’s front panel is a but-  
ton labeled PROTECTION. This button activates the  
HPS-4/HPS-6’s impedance correction circuitry. The circuit-  
ry assures that your receiver or amplifier will see a safe  
operating load when playing multiple speaker pairs simul-  
taneously. 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 imped-  
ance might fall below 4 ohms. Use the following chart as a  
guide for setting the Protection button.  
If your amplifier  
or receiver has “A”  
and “B” speaker-  
pair outputs,  
connect the speaker  
selector to the “A”  
outputs. Do not con-  
• 1/8" Standard  
Slotted Screwdriver  
• Wire Stripper  
Type of Speaker Wire  
For most applications, we recommend you use 16 or  
18 gauge, stranded copper speaker wire for the HPS-4/HPS-6  
connections. For wiring runs longer than 80 feet, 14 gauge  
wire is recommended. Using speaker wire larger than  
14 gauge for the HPS-4/HPS-6 connections is not recom-  
mended—the wire may not fit into the connectors. Never  
use solid-core, aluminum, or “Romex” type wire with the  
HPS-4/HPS-6. When running 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.  
nect anything to “B”.  
This will prevent the  
amplifier or receiver  
from driving an  
unusually low  
impedance load.  
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 HPS-4/HPS-6  
wiring near electrical devices, route the speaker wires several  
feet away from the electrical wiring.  
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6. To turn off one or more speaker pairs, simply press the  
corresponding on/off button(s) on the speaker selector.  
Refer to the protection chart for the correct setting of the  
Protection button.  
Features and Benefits  
Constant Protection Switch  
The HPS-4 and HPS-6 offer a number of improvements over  
other speaker selectors:  
The HPS-4/HPS-6 is equipped with a manual override for the  
protection circuit that enables you to defeat the front panel  
protection switch and maintain constant impedance protec-  
tion. This will safeguard your amplifier from being overdriven  
due to accidental or improper use by anyone unfamiliar with  
the equipment.  
• Power handling: 250 watts per channel RMS  
• Protection circuit safeguards receiver/amplifier  
TECH  
SUPPORT  
HOTLINE  
• Separate left and right ground paths for compatibility with  
all amplifiers  
To engage this override, move the rear panel “Constant  
Protection” switch to the “On” position. Constant imped-  
ance protection will be maintained until the switch is turned  
to “Off”.  
If you have questions  
regarding the opera-  
tion of the Niles HPS  
series, contact your  
local Niles dealer  
or Niles Technical  
Support at  
• Rear-panel switch for constant or selectable impedance  
protection  
• Removable connectors accommodate up to 12 gauge wire  
• Rugged all metal chassis construction  
• Non-skid feet won’t scratch furniture and ensure unit stability  
during operation  
1-800-289-4434.  
• 72 adhesive-backed room identification labels  
• Requires an amplifier that is compatible with a 4 ohm load  
• Warranty: Ten-year limited  
• Dimensions: 17" wide x 2" high x 8-5/8" deep  
• Shipping weight: approximately 7 lbs  
13  
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