Niles OS7.5 Istruzioni operative originali

7. 5

OS6.5

OS5.5

MODELS

7. 5

OS6.5

OS5.5

Indoor/Outdoor Loudspeakers

BLENDING HIGH FIDELITY

AND ARCHITECTURE®

INSTALLATION & OPERATION GUIDE

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CONGRATULATIONS

Thank you for choosing Niles OS Indoor/Outdoor loudspeakers. With proper

installation and operation, you’ll enjoy years of trouble-free use.

Niles manufactures the industry’s most complete line of custom installation

components and accessories for audio/video systems. To learn more about

Niles products, visit our website: www.nilesaudio.com or call us at 800-BUY-HIFI

(800-289-4434).

TABLE OF CONTENTS

INTRODUCTION 2

FEATURES & BENEFITS 3

PARTS GUIDE 5

INSTALLATION CONSIDERATIONS 7

PAINTING OS SERIES LOUDSPEAKERS 12

INSTALLATION 15

OPERATION 18

SPECIFICATIONS 19

WARRANTY REGISTRATION CARD 21

LIMITED WARRANTY 22

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Niles once again raises the bar. With our first OS Indoor/Outdoor models we

revealed a radical new understanding of loudspeaker capabilities. Niles original

OS Indoor/Outdoor loudspeakers are constantly praised for their ability to deliver

exemplary reliability and outstanding sound quality. These attributes have made

Niles OS Indoor/Outdoor loudspeakers the best selling loudspeakers in their class.

The goal of our new OS Indoor/Outdoor line-up is to raise this bar with refined

appearance and superior sonic performance. Once again establishing a

benchmark by which all others are judged. The new Niles OS Indoor/Outdoor

loudspeakers owe much of their performance and sound quality advantage to

design elements pioneered in the award-winning Niles DS Directed Soundfield™

loudspeakers. Their engineering advances come from our integrated approach to

driver and cabinet design. By integrating the woofer basket into the baffle of the

cabinet we are able to increase the woofer cone-area to cabinet-width ratio. Thus

enabling OS Indoor/Outdoor loudspeakers to provide levels of bass performance

that substantially exceed their physical size. However, deeper and more powerful

bass isn’t the only refinement in the new OS Indoor/Outdoor line-up. A new and

modern style enables OS Indoor/Outdoor loudspeakers to blend seamlessly with

the architectural elements both indoors and out. After the installation is complete,

you will be astonished by the experience of hearing such clean and powerful

sound coming from such elegant appearing loudspeakers.

INTRODUCTION

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Patent Pending Integrated Woofer/Baffle Assembly

Increases the woofer cone-area to cabinet-width ratio for enhanced bass output

Interlaced Carbon Fiber Woofer Cone

Reduces breakup and lowers distortion

Butyl Rubber Woofer Cone Surround

Damps resonance and provides exceptional durability

Dispersion Stabilizer

Distributes midrange tones for clear off-axis sound

Tri-laminate Teteron Dome Tweeter

1" fluid-cooled tweeter provides ultra-wide dispersion for clear, detailed and

extended high-frequencies

Weatherproof Engineering

Enables OS loudspeakers to handle extreme hot, cold and moist environments,

exceeding the military’s strict anti-corrosion specification MIL-STD-883D

Advanced Material Science

Elevates appearance and longevity of the cabinet and grille, plus enhances the

performance of the woofers, tweeters and crossovers

Architectural Friendly Design

Delivers stellar acoustical performance yet tucks discretely away into corners and

under eaves

FEATURES & BENEFITS

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Low Diffraction Grille and Front Baffle

Ensures that the sound waves emanating from the woofer and tweeter are not

reflected by the surrounding parts of the loudspeaker for precise imaging and

acoustical accuracy

Rigid, Acoustically Inert Cabinet

Prevents transmission of unwanted vibrations for clean and dynamic bass response

All-Weather Versatility

Reduces installation limitations to provide great sound from the beaches of Miami

to the harsh winters of Minneapolis

Home Theater Applicability

Enables OS loudspeakers to be used as left, center, right, or surround loudspeakers

in home theater systems

Integrated Mounting Bracket and Shelf Stand

Provide a variety of secure, quick and easy mounting solutions

Tapered Shape

Facilitates mounting in corners and under eaves

Inverted Gold Plated 5-Way Binding Posts

Repel moisture and ensure positive connections in virtually any conditions over

long periods of time

FEATURES & BENEFITS

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PARTS GUIDE

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PARTS GUIDE

Figure 1 OS .5 Parts Guide

a. Mounting Bracket

b. Nail Hole

c. Wire Hole

d. Screw Hole

e. Bracket Knob

f. Grille

g. Cabinet

h. Binding Posts

i. Threaded Insert (1/4"-20 Thread size)

j. Shelf Stand

NOTE: Bracket and Shelf Stand are used depending upon installation requirements.

See Installation Instructions.

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Tools and Materials Required

• A wire stripper

• A pencil

• A level (optional)

• Three screws or bolts suitable for the mounting surface

• The proper screwdriver for your mounting hardware

• A drill bit of the right size and type

• An electric drill

Wiring

The OS loudspeakers connect to your receiver or amplifier using 2-conductor

loudspeaker wire (See Figure 2). For most applications, we recommend using 16

or 18 gauge wire. For wiring runs longer than 80 feet, we recommend 14 gauge

wire. The binding posts on OS loudspeakers accommodate up to 12 gauge wire

directly. Larger sizes can be accommodated using spade, banana, or pin

connectors.

When you run wire inside walls, outdoors or in marine installations, special

jacketing or conduit is required for a trouble-free installation and conformation to

the local and national building codes. If you are not sure of the correct wire jacket

or type of conduit to use, consult a professional audio/video installer, building

contractor, or the local building and inspection department.

Incorporating a Volume Control

It’s possible to control the volume of the sound at the loudspeaker location. Plan to

wire the system so that each pair of loudspeakers has its own volume control. Niles

makes a wide range of indoor and outdoor volume controls with and without

muting capabilities. Consult your local Niles dealer for more information. Volume

controls are connected in line with the loudspeaker, so you must connect the wire

from the amplifier to the volume control and then from the volume control to the

loudspeaker (See Figure 3).

INSTALLATION CONSIDERATIONS

TECH TIP

Wire size is expressed by its AWG (American Wire

Gauge) number. The lower the number, the larger

the wire, i.e. twelve AWG is physically larger than

fourteen AWG.

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Recommended Amplifier Power

For optimum performance, we recommend an amplifier with a power rating of: five

(5) to one hundred (100) watts per channel for the 0S 5.5 loudspeaker; five (5) to

one hundred twenty five (125) watts per channel for the OS 6.5 loudspeaker; five

(5) to one hundred fifty (150) watts per channel for the OS 7.5 loudspeaker.

Ironically, most loudspeakers are not damaged by large amplifiers but by small

amplifiers. If you are playing at high volume, a small amplifier will run out of power

very quickly. When an amplifier runs out of power it creates damaging “clipping”

distortion. A large amplifier will play at the same volume without distorting. See the

section “Operation” for more information about clipping distortion.

Placing Loudspeakers for the Best Sound Quality

An OS loudspeaker’s dispersion pattern is very broad. This allows good sound

quality over an extremely large listening area. However, if a single pair is positioned

to provide coverage of a very large room or patio, you will have “hot spots” of loud

sound when you are near the loudspeakers. The best way to avoid hot spots for a

large space is to use several pairs of loudspeakers evenly spaced throughout the

room. A good rule of thumb is to install a pair of loudspeakers for every 200 to 400

square feet of listening area. Your local Niles dealer is a good source for advice on

loudspeaker placement for your particular installation.

INSTALLATION CONSIDERATIONS

Figure 2

Wiring directly from a receiver

or amplifier

Figure 3

Incorporating a volume control

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When using more than one pair, it is usually best to alternate a left channel and

then a right channel, so that you have the best possible stereo coverage possible.

The position of the loudspeakers and their surroundings play a very important role

in how a stereo image is created. You should experiment to find the very best

position for your loudspeakers. Here are some guidelines to make the process

quick and easy.

Make sure you are not blocking or reflecting the sound off of furniture or other

objects. You should have a direct line of sight with the front of the loudspeaker. To

determine the best position, measure the distance between the ideal listening

position and the wall you plan to mount the loudspeakers on. Try to place the

loudspeakers so that they are at least one-half the listening distance apart (this

maintains a large, pleasant stereo “image”) and less than the entire listening

distance (this avoids a “hole-in-the-middle” effect). For example; if you are ten feet

back from the wall, the loudspeakers should be between five and ten feet apart (See

Figure 4).

INSTALLATION CONSIDERATIONS

Figure 4

Illustration depicts the optimum

placement zone for a listening

distance of ten feet.

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