Niles Audio OS-25 User's Manual
Contents
1. Ohms Frequency Response 68 Hz to 21kHz plus or minus 3 GB on axis Sensitivity 91 decibels for 2 83 volts of Pink Noise measured at 1 meter on axis Wiring Requirements Sixteen to eighteen gauge 2 conductor unshielded or shielded wire for runs up to eighty feet Fourteen gauge 2 conductor unshielded or shielded wire for runs up to two hundred feet Temperature Extremes 50 to 200 Fahrenheit Dimensions Speaker without U Bracket 9 7 8 Wide x 13 High x 7 1 4 Deep Dimensions Speaker with U Bracket 9 7 8 Wide x 13 High x 9 Deep Weight Speaker and Bracket 9 Ibs gees DEVACH HERE Ea Soni ois foe heeds eae es eee tas ee E PLEASE FILL OUT THE WARRANTY REGISTRATION CARD ON THE REVERSE SIDE DETACH AND MAILTO Niles Audio Corporation Warranty Registration Dept P O Box 160818 Miami Florida 33116 0818 x NILES WARRANTY REGISTRATION CARD Model Purchased Serial Number Date Purchased month day year Dealer Name and Location Q Dr Q Miss Q Mr Q Mrs Q Ms Name Address City State Zip Telephone Please take a moment to fill out our warranty registration card The information helps us to get to know you better and develop the products you want Age d Under 25 125 34 135 44 1 45 54 1155 amp over Income CI Under 24 999 1 25 000 34 999 1 35 000 44 999 T 45 000 59 999 L 60 000 74 999 1 75 000 99 999 CI Over 99 999 Occ2. locked into place quickly and easily Easy Three Way Mounting System 1 The OS 25 can be hung from a nail using the nail hole on the bracket 2 The bracket can be screwed into the mounting surface using your hardware 3 The OS 25 is equipped with 1 4 20 threaded inserts for OmniMount or custom brackets Stable Shelf Placement The bracket knobs serve as one of the speaker s feet when the OS 25 is placed directly on a shelf or desktop without the bracket In addition two feet are molded into the base of the cabinet to give added stability gt A m 2 Re vs m zZ m N PARTS GUIDE INSTALLATION CONSIDERATIONS Tools and Materials Required e A wire stripper e A pencil e A level optional e Three screws or bolts suitable for the mounting surface e The proper screwdriver for your mounting hardware e A d ill bit of the right size and type e An electric drill Wiring The OS 25 connects to your receiver or amplifier using 2 conductor speaker 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 of the OS 25 will accommodate up to 12 gauge wire direct ly 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
3. ES warrants its outdoor loudspeaker products to the original purchaser to be free of manufacturing defects in material and workmanship for a period of two years from date of purchase This Warranty is subject to the following additional conditions and limitations The Warranty is void and inapplicable if NILES deems that the product has been used or handled other than in accordance with the instructions provided by the manufacturer including but not limited to damage caused by accident mishandling improper installation abuse negligence or normal Wear and tear or any defect caused by repair to the product by anyone other than NILES or an authorized NILES dealer To obtain warranty service take the unit to the nearest authorized NILES dealer who will test the product and if necessary forward it to NILES for service If there are no authorized NILES dealers in your area you must write to NILES and include your name model and serial num ber of your unit along with a brief description of the problem A factory Retum Authorization Number will be sent to you DO NOT RETURN ANY UNIT WITHOUT FIRST RECEIVING WRITTEN AUTHORIZATION AND SHIPPING INSTRUCTIONS FROM NILES If the above conditions are met the purchaser s sole remedy shall be to retum the product to NILES in which case NILES will repair or replace at its sole option the defective product without charge for parts or labor NILES will reum a unit repaired or replaced under warranty by
4. M NILES Niles Audio Corporation 12331 S W 130 Street Miami Florida 33186 Tel 305 238 4373 Fax 305 238 0185 Printed in Taiwan 2000 Niles Audio Corporation DS00272ATW INSTALLATION amp OPERATION GUIDE Indoor O utdoor Loudspeaker Mf NILES o BLENDING HIGH PIDELI Y AND ARCHI EGC URE CONGRATULATIONS Thank you for choosing the OS 25 Indoor O utdoor Loudspeaker from Niles 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 For a free full line catalog write Niles Catalog Request P O Box 160818 Miami Florida 33116 0818 TABLE OF CONTENTS INTRODUCTION 2 FEATU RES amp BENEFITS 3 PARTS GUIDE 6 INSTALLATION CONSIDERATIONS 7 PAINTING THE OS25 12 INSTALLATION 15 OPERATION 18 SPECIFICATIONS 19 WARRANTY REGISTRATION CARD 21 LIMITED WARRANTY 22 2000 Niles Audio Corporation All rights reserved Niles reserves the right to change product specifications without notice Niles the Niles logo and Blending High Fidelity and Architecture are registered trademarks of Niles Audio Corporation MicroPerf is a trademark of Niles Audio Corporation OmniMount is a registered trade mark of OmniMount Systems INTRODUCTION The OS 25 marries unparalleled listening satisfaction with the freedom to listen to music any
5. g Methods The OS 25 can be mounted either horizontally or vertically The bracket knobs will keep the speaker angled correctly in any position once they are tightened You can choose from three mounting methods to attach the OS 25 to the wall ceiling or other mounting surface Z 4 gt Z i zZ 2 gJ m ag O Z a Z Z gt m Z Q Z 2 J ri ra Z VN 1 If the speaker is never going to be exposed to sudden accidental impacts wind waves or earthquakes you can simply hang it on a nail using the nail hole s of the bracket See Figure 7 2 The safest and most secure way to mount the speaker is by screwing it to the mounting surface using your own hardware suitable for the surface you are mounting to and the bracket supplied with the speaker See Figure 7 3 There are threaded brass inserts on the back of the OS 25 for attaching an OmniMount or a custom bracket See Figure 7 This allows you to position the speaker at unusual angles or distances from the mounting surface Safety First Be careful to use hardware that is designed for the surface you are mounting to The OS 25 with the bracket weighs 9 pounds If you are not sure ofa safe way to mount the speakers consult a professional installer or a building contractor You will maximize the useful life of the speaker by placing the speaker so that it receives less exposure to the element
6. hout distorting See the section Operation for more information about clipping distortion Z a gt zZ im zZ ae gJ m rag Z a Placing the OS 25 for the Best Sound Quality The OS 25 s dispersion pattern is very broad The speaker is very sensitive and will handle a lot of amplifier power 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 speakers The best way to avoid hot spots for a large space is to use several pairs A good rule of thumb is a pair of speakers for every 200 to 400 square feet of listening area Your local Niles dealer is a good source for advice on speaker placement for your particular installation When using more than one pair it is usually best to alternate a left channel and then a right channel so that you never have a left next to a left The position of the speakers and the surroundings around them play a very important role in how a stereo image is created You should experiment to find the very best position for your speakers Here are some guidelines to make the process quick and easy A Speaker Placement Zone i Speaker Placement Figure 4 Zone Illustration depicts the opti mum placement zone for a lis tening distance of
7. lear sweet natural sounding tweeter which still maintains extended frequency response 6 1 2 Injection Molded TCC Woofer The unusually stiff and light injection molded TCC cone the butyl rubber sur round the substantial magnet and the rigid steel basket are all optimized for large excursions of the woofer In this way the 6 1 2 woofer can create the same deep bass output of a much larger speaker moving small distances in and out The end result is rich satisfying bass from a compact weather resistant loudspeaker Rigid Acoustically Inert Enclosure The cabinet of the OS 25 is composed of mineral filled polypropylene This material is extremely non resonant All you hear is the music Low Diffraction MicroPerf Aluminum Grille and Front Baffle The aluminum MicroPerf grille of the OS 25 has hundreds of precisely sized perforations creating an acoustically transparent grille The aluminum construc tion resists oxidation enabling years of trouble free operation in the harshest conditions The front baffle is gently curved in a radius optimized for the best sound Sound waves emanating from the woofer and the tweeter are not reflected by the surrounding parts of the speaker Tapering Shape The cabinet of the OS 25 is shaped so that the speaker will tuck discretely away into corners or under eaves Swiveling Bracket The U shaped bracket and bracket knobs allow the OS 25 to be pointed at the optimum listening position and
8. n phase and works correctly angle the speaker for the best sound 2 Tighten the bracket knobs using only your hands Use of any power tools may over tighten the knob and strip the threads of the insert 3 Check that the entire installation is safe and secure OPERATION l Listening at Higher Volumes Outdoors there are no walls to reflect and contain the sound It requires more power to achieve a reasonable volume of sound outside than it does when you are indoors You also frequently find yourself very far from the speaker It is possible to tum the volume so high that the amplifier runs out of power This creates clipping distortion Clipping distortion makes treble sound very harsh and unmusical When you hear harsh sounding treble from any good speaker indoors or outdoors turn the volume down immediately Those harsh sounds are masking some much more powerful ultra high frequency sound spikes which will quickly damage any fine loudspeaker Cleaning You can clean the OS 25 s with a dampened soft cloth or paper towel If the speaker is mounted high up on a wall or ceiling use a broom to gently brush it off Hosing off the speaker is not recommended as the tweeter is a precise mechanism which might be damaged by a high pressure stream of water a Q ri S O zZ 2 2 rmi a T O ie Z N SPECIFICATIONS Recommended Amplifier Power Five to one hundred fifty watts per channel Nominal Impedance 4
9. o not touch or rub the speakers on the front baffle Thick paint will tend to clog the grille holes Make sure everything is dry before masking 3 Mask off the binding posts and the brass threaded inserts on the back panel Replacing the Grille with masking tape Carefully fit the grille into its recess so that it is barely in place Starting with 4 Mask off the threaded inserts on the top and bottom with masking tape one comer go around the speaker pushing the grille in a little bit each time You should be gentle the aluminum grille can be easily bent out of shape You 5 Protect the front of the speakers by inserting the supplied paint masks in will feel a positive snap when itis fully in place place of the grills Painting the Cabinet Bracket Knobs and Bracket 1 Apply two thin coats of a primer to the cabinet and knobs We recommend Krylon Sandable Spray Primer 1318 The bracket doesn t require a coat of primer 2 Allow the primer to completely dry 3 Apply the finish color 4 Allow the paint to completely dry 5 Carefully remove the masking material 6 Do not reattach the speaker to the bracket e8 To the bracket es dmundted TryTjO 1 3684 TDO Tw wo tkee anl fhndalng mf the gfreshy raint d paits oo ta inuimum Tj F1 1 Tf 1 3258 INSTALLATION l Mounting the Bracket 1 Remove the bracket knobs and the bracket from the speaker 2 Hold the bracket up to the mounting surface The speaker can be mounted either h
10. orizontally or vertically Hold the bracket so that the speaker wire fits through the large circular wire hole in the bracket Align the bracket to be square with the surroundings use a level for accuracy 3 Mark the locations of the three oval shaped screw holes See Figure 9 Be sure to use all of the holes 4 Drill pilot holes into the mounting surface Figure 9 Mounting the OS 25 5 Pull the speaker wire through the wire hole in the center of the mounting bracket Align the bracket so that the holes all line up 6 Use your hardware to attach the bracket to the mounting surface Connecting the Speaker 1 Separate the two conductors of the speaker wire so that at least two inches of each conductor are free 2 Strip one half inch of insulation from the end of each conductor of the speaker wire 3 If you have any connectors gold pins or bananas which you prefer to use affix them to the stripped wire ends now Only gold plated connectors should be used outside as they will not tarnish or corrode 4 Use the bracket knobs to attach the speaker to the bracket Do not tight en the knobs completely Angle the speaker so that the rear terminals are accessible 5 Connect one stripped wire end or connector to the black and one to the red terminal Pay attention to the markings on the wire Each speaker must be connected to the amplifier in the same way Speaker Phase Speaker wire has two cond
11. s Look for the best overall compromise between sound quality convenience and exposure Do not compromise safety PAINTING THE OS 25 The enclosure the brackets and the grills of the OS 25 can all be painted to match the surroundings Because we want you to preserve the acoustic quali ties of the grille please paint the grille according to the grille painting instruc tions Make sure you pick a paint that is appropriate for the mounting location There are interior and exterior varieties and even paint for marine uses If you are not sure what paint to use consult a paint store professional or a painter Tools Required e A spray can of primer paint Krylon Sandable Spray Primer 1318 e The correct paint for the surroundings oil or water based paint is fine e A paint brush or applicator if the paint is notin a spray can e A paper clip or a corkscrew for removing the grille e Masking tape e 2 paint masks supplied e A damp cloth and a dry cloth Preparing to Paint 1 Separate the parts of the speaker You should remove the brackets and the bracket knobs Remove the grille by hooking it with a bent paper clip or the tip of a corkscrew and pulling it away from the cabinet See Figure 8 z zZ Z I m E N ezi 2 Wipe off the other sides of the cabinet the bracket bracket knobs and grille If you are using an applicator or brush and a can of paint thin the paint first with a damp cloth D
12. shipping same by its usual shipping method from the factory only at its expense within the United States of America THERE ARE NO OTHER WARRANTIES INCLUDING WITHOUT LIMITATION EITHER EXPRESS OR IMPLIED WARRANTIES OF MERCHANTABILITY OR FIT NESS FORA PARTICULAR PURPOSE WITH RESPECT TO THE PRODUCT REPAIR OR REPLACEMENT AS PROVIDED UNDER THIS WARRANTY IS THE EXCLUSIVE REMEDY OF THE CONSUMER PURCHASER NILES SHALL NOT BE RESPONSIBLE FOR ANY INCIDENTAL OR CONSEQUENTIAL DAMAGES EXCEPT TO THE EXTENT PROVIDED OR PROHIBITED BY APPLICABLE LAW Some states do not allow the exclusion or limitation of incidental or consequential damages so the above limitation may not apply to you This warranty gives you specific legal rights and you may also have other rights which vary from state to state For the name of your nearest authorized NILES dealer contact NILES AUDIO CORPORATION P O BOX 160818 Miami Florida 33116 0818 Please fill in your product information and retain for your records Model Serial No Purchase Date Fazl a S Zz lt Ro A m a DH re fe zZ
13. 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 speaker To determine the best position measure the distance between the ideal listening position and the wall you plan to mount the speakers on Try to place the speak ers 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 speakers should be between five and ten feet apart See Figure 4 You can control the speakers bass output by placement This is called the boundary effect You will get more bass response by mounting the OS 25 directly to a wall or other flat surface any boundary close to the speaker will reinforce the bass frequencies You can increase the bass output even more by mounting the OS 25 in a corner or under an eave See Figure 5 This type of placement gives the speaker two boundaries both reinforcing the bass sounds Of course if you wish to hear less bass try moving the speaker away from the boundary See Figure 6 eS Figure 5 Figure 6 Placement for more bass output Placement for less bass output Mountin
14. than fourteen AWG Ce 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 CI TUNER 949 15 ul li ool ooo oo Se a i e HHB i Incorporating a Volume Control It s possible to control the volume of the sound at the speaker location Plan to wire the system so that each pair of speakers has it s own volume control Niles makes a wide range of indoor and outdoor volume controls Consult your local Niles dealer for more information Volume controls are connected in line with the speaker so you must connect the wire from the amplifier to the volume con trol and then from the volume control to the speaker See Figure 3 Recommended Amplifier Power We recommend an amplifier with a power rating of five to one hundred fifty watts per channel for optimum performance Ironically most speakers 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 amplifi er runs out of power it creates damaging clipping distortion A large amplifier will play at the same volume wit
15. uctors One conductor is attached to the negative terminals and one conductor is attached to the positive terminals of both your speaker and your amplifier Usually the wire is marked for your conve nience There are different ways to mark the wire a stripe on one wire a ribbed area of one conductor you can only feel different colors of metal wire on each conductor or there might be a fabric strand or string wound into one of the conductors Of course there are some wires which appear completely identical Be careful to avoid mistakes If you do one speaker will be playing out of phase with the other speaker An out of phase pair of speakers work against each other and the sound of the two speakers playing together will be lacking in bass and phasey sounding If you suspect the sound is not right and you cannot see any markings on the wire try this simple test 1 Point the speakers at each other rather than at you 2 Play some music with the amplifier or radio set to Mono 3 Stand so you are the same distance from each speaker and listen to the rich ness of the bass and the loudness of the sound 4 Tum off the amplifier and reverse the connections on one speaker only 5 Repeat the listening test with the same setting of the volume control When the sound has a richer bass and is slightly louder the speakers are working together or in phase Final Adjustments 1 After checking that the speaker is i
16. upation 1 Arts Entertainment C1 Business Owner 1 Engineer 4 Finance Accounting 1 General Office 1 Management CI Professional M1 Sales Marketing O Student L Tradesperson Musical tastes Please check all that apply T Alternative d Classical J Country T Jazz LI New Age 1 Popular O R amp B CI Rock T Other How did you hear about Niles 4 Architect Developer M Custom Installer Q Direct Mail 1 Friend Family In Store Display 1 Interior Designer I Magazine Ad M Mail Order Catalog 1 Newspaper Ad C1 Product Brochure M Product Review QI Retail Salesperson What magazines do you read 1 Who will install the product 1 Custom Installer QI Electrician 1 Friend CI Myself Which factor s influ enced the purchase of your Niles product Please check all that apply 1 Ease of Use 1 Price Value C1 Product Features 4 Quality Durability C1 Reputation 2 Style Appearance 1 Warranty Do you T Own a House If yes how many square feet 1 Own a Town House Condominium Co op Q Rent an Apartment 4 Rent a House Are you interested in receiving literature on other Niles products OYes T No Are there products capabilities that you would like to see introduced DETACH HERE AND RETURN TO Niles Audio Corporation Warranty Registration Dept P O Box 160818 Miami Florida 33116 0818 LIMITED WARRANTY Niles Audio Corporation NIL
17. where You can use them indoors and outdoors even on a boat The extraordinary sonic performance of the OS 25 was achieved by harmoniz ing unique and proprietary technology with the most advanced manufacturing methods and materials available The OS 25 is a two way speaker in an acoustic suspension enclosure The cab inet is shaped to fit neatly into corners or eaves It is supplied with a swiveling mounting bracket for easy installation anywhere In addition our engineers constructed the OS 25 s to withstand the stresses and strains of the world out side For the first time serious listeners can enjoy a concert on the green in their own back yard Z A Q g fe zZ gt A m N Re vs m Z m N FEATURES amp BENEFITS l Precision Crossover An electronic dividing network inside the cabinet precisely distributes the music to the woofer and the tweeter The two way design of the OS 25 s crossover provides excellent stereo imaging and low distortion 1 Teteron Tweeter In the past every weather resistant speaker has disappointed listeners with a fatiguing and harsh treble sound caused by tweeter ringing The OS 25 s 1 Teteron tweeter utilizes a tri laminate design consisting of an inner textile layer which forms the dome a high damping layer to kill unwanted reso nances and an outside layer of urethane to add stiffness and prevent breakup modes The result is a transparently c
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