Niles Audio OS7.5 User Manual

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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

M O D E L S

OS7.5

OS6.5

OS5.5

Indoor/Outdoor Loudspeakers

B L E N D I N GH I G HF I D E L I T Y

A N D A R C H I T E C T U R E®

CONGRATULATIONS

Thank you for choosing Niles OS Indoor/Outdoor loudspeakers. With proper installation and operation, you’ll enjoy years of trouble-freeuse.

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 at800-BUY-HIFI (800-289-4434).

TABLEOFCONTENTS

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

 

 

 

 

INTRODUCTION

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-upis 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 theaward-winningNiles 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 woofercone-areatocabinet-widthratio. 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/Outdoorline-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

2

BENEFITS & FEATURES

FEATURES&BENEFITS

Patent Pending Integrated Woofer/Baffle Assembly

Increases the woofer cone-areatocabinet-widthratio 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-axissound

Tri-laminateTeteron Dome Tweeter

1" fluid-cooledtweeter providesultra-widedispersion for clear, detailed and extendedhigh-frequencies

Weatherproof Engineering

Enables OS loudspeakers to handle extreme hot, cold and moist environments, exceeding the military’s strict anti-corrosionspecificationMIL-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

3

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-WeatherVersatility

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-WayBinding Posts

Repel moisture and ensure positive connections in virtually any conditions over long periods of time

BENEFITS & FEATURES

4

GUIDE PARTS

PARTSGUIDE

e

a

d

b

c

d

g f

g

j

e

5

PARTSGUIDE

h

i

GUIDE PARTS

Figure 1 OS .5 Parts Guide

 

a.

Mounting Bracket

f.

Grille

b.

Nail Hole

g.

Cabinet

c.

Wire Hole

h.

Binding Posts

d.

Screw Hole

i.

Threaded Insert (1/4"-20Thread

e.

Bracket Knob

j.

Shelf Stand

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

6

CONSIDERATIONS INSTALLATION

INSTALLATIONCONSIDERATIONS

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-conductorloudspeaker 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.

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.

When you run wire inside walls, outdoors or in marine installations, special jacketing or conduit is required for a trouble-freeinstallation 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).

7

CONSIDERATIONS INSTALLATION

Figure 2

Figure 3

Wiring directly from a receiver

Incorporating a volume control

or amplifier

 

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.

8

CONSIDERATIONS INSTALLATION

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.

Figure 4

Illustration depicts the optimum placement zone for a listening distance of ten feet.

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-halfthe 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).

9