VIRTUALLY INVISIBLE 191 SPEAKERS

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SAFETY INFORMATION
Important words of caution
Please read this owners guide completely before you start. Then carefully consider your experience using the tools and taking the precautions referred to here. If you have doubts about doing this installation, you should contact either the dealer you purchased the product from, an electrician, or a professional audio/video installer. You can describe the job and request a cost estimate before committing to installation service. WARNING: Installation shall be in accordance with the applicable section of the National Electrical Code, ANSI/NFPA 70, and/or the National Fire Alarm Code, ANSI/NFPA 72, as applicable. The wiring method and compartment shall be such as not to interfere with the operation of the speaker. CAUTION: Consult local building codes before you get started with this installation. CAUTION: This product is not intended for use in Air-Handling Plenum Spaces. CAUTION: Failure to follow the instructions in this owners guide voids all warranties on your speakers.
Use these instructions with wood frame or similar construction only
Each speaker requires 81/16 in. (20.5 cm) of horizontal space, and 14 in. (35.6 cm) of vertical space inside the wall or ceiling, plus a minimum of 41/8 in. (10.5 cm) of depth from the face of wallboard that is a maximum of 3/4 in. (1.9 cm) thick. Bose recommends installing these speakers only in wood frame or similar construction where there is enough space between studs, as is found in 2 x 4 or 2 x 6 wall/ceiling construction. The instructions in this guide are specific to that type of installation only. Note: These speakers are not designed for installation in walls or ceilings of masonry.
Important Safety Instructions
1. 2. 3. 4. 5. 6. Read these instructions - for all components before using this product. Keep these instructions - for future reference. Heed all warnings - on the product and in the owners guide. Follow all instructions. Do not block any ventilation openings, install in accordance with the manufacturers instructions. Only use attachments/accessories specified by the manufacturer.
Bose Virtually Invisible 191 Loudspeakers comply with the following specifications: This product conforms to the EMC Directive 89/336/EEC and to the Low Voltage Directive 73/23/EEC. The complete Declaration of Conformity can be found on <www.bose.com>.

For your records

Serial numbers are located on the center rear of each of the Virtually Invisible 191 speakers. Serial numbers:______________________________ and __________________________________ Dealer name:_______________________________________________________________________ Dealer phone:_____________________________Purchase date: __________________________ We suggest you keep your sales receipt and warranty card together with this owners guide.

Espaol

CONTENTS

INTRODUCTION

Before you begin. What makes this speaker better also makes it different.

PREPARATION

Unpacking. Other equipment you will need. Deciding on speaker placement. Three tips for determining speaker placement. Consider which shape you prefer for your speakers. Considering your wall type and the approach it requires. For placement in walls. For placement in ceilings.

STEPS TO INSTALLING

Before you make any holes. Drill a pilot hole for testing the wall space. Using the template. Drilling the pilot hole. Testing the space behind the hole. Passing the pilot hole test. Repairing a pilot hole. Prepare the wall for inserting the speaker. Measure and mark the hole to be cut. Cutting the speaker hole. Reorienting or changing speaker frames. Reorienting the rectangular frame logo. Installing round speaker frames. Insert and wire the speaker. Insert the speaker into the opening. Make the speaker connections. Test the speaker now. Position the speaker all the way into the hole. Secure the speaker to the wall. Attaching rectangular grille frames. Attaching round grilles.

REFERENCE

Painting the speakers. Painting the grille. Painting the frame. Help for the beginning installer. Optional items that will assist you:. Accessories that can help. Using speaker cord. Preparing the speaker cord. Before the wallboard goes up. Installing in a pre-wired room. Where the walls are finished. What to do when the room is not pre-wired. Installing in an exterior wall. Use special care in cutting through plaster and lath. Special considerations in cold climate regions. Troubleshooting. Customer service. Warranty period. Accessories. Technical information.

Before you begin.

CAUTION: Please be sure to read this guide carefully before you do any cutting. There are many factors to consider before proceeding with this type of installation. Thank you for choosing to install Bose Virtually Invisible 191 speakers. Innovative engineering and advanced design enable these speakers to deliver Bose quality performance for big impact in spite of their small size. Virtually Invisible 191 speakers feature an Articulated Array speaker configuration that delivers the type of clear, lifelike sound and even coverage known as Bose Stereo Everywhere speaker performance.
What makes this speaker better also makes it different
When installed, Virtually Invisible 191 speakers take up very little wall space. What isnt apparent is their advanced speaker enclosure design, shown in Figure 1. It ensures predictably fine performance wherever the speakers are installed, regardless of the size and shape of the wall space. It also helps prevent the speaker sound from invading other rooms, a common problem with installed speakers of more conventional design. Figure 1
Speaker enclosure with the rectangular frame attached Rectangular grille Speaker frame screws Rectangular speaker frame Speaker face

Dogleg clamps

Dogleg clamp screws

Speaker enclosure

Hardware for securing the speaker to a wall or ceiling comes attached to the speaker, but you will need a variety of other equipment and tools to install the speakers (Figure 3).
Carefully unpack the speakers. Check to be sure the carton includes all the parts shown in Figure 2. If any part of the speaker pair appears damaged, do not use them. Notify Bose or your authorized Bose dealer immediately. For Bose contact information, refer to the address list included in the carton.
Note: Now is a good time to find the serial numbers on the back of each speaker and copy the numbers onto your warranty card and in the For your records space on page 2.
Please refer to Help for the beginning installer on page 21 for additional information on working with tools, materials, and other do-it-yourself information.

Before you make a large cut into the wallboard, check the space by probing behind the wall or ceiling through a small pilot hole. Time spent now can help ensure a successful installation. Note: If you are working in an exterior wall where there is insulation, it may be difficult to probe behind a pilot hole. You may prefer to eliminate this step and skip ahead to Prepare the wall for inserting the speaker on page 13. Do this only if you can be sure the insulation is malleable and that nothing else behind the wall will impede the installation. WARNING: If you believe the insulation behind the wall may be composed of asbestos, do not drill or cut into that wall. Find a different location for the speakers instead.

Using the template

You will need a sharp pencil for this step. The template shows where to drill two 1/2 in. (13 mm) pilot holes before you make an opening large enough for the entire speaker. You can then test the space behind the hole to make sure there is enough room for the speaker and that there are no materials blocking the installation. Notice the dotted lines extending at an angle from the pilot hole to the bottom corners of the DO NOT CUT area on the template. Use them as a guideline to be sure there is enough room below the pilot hole for the length and width of the speaker enclosure. To position the template 1. Select a spot on the wall or ceiling where you want the center of the speaker grille. Allow enough space for the speaker enclosure both above and below the pilot hole. You may need that second option if you find an impediment in the space below the hole. 2. 3. 4. Figure 7
Preparing to cut a pilot hole At least 9" (22.9 cm)
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Center the pilot-hole circles on the selected spot as you press the template to the wall. Use a pencil to trace around the inside of the circles (Figure 7). Remove the template.
DO CUT NOT AR GRAY OUND AREA

2" (36

TAP E HERE

DO CUT NOT AR GR OU AY

ND AREA DO CUT NOT AR GRAY OUND AREA

Pilot hole

DO CUT NOT AR GRAY OUND AREA DO CUT NOT AR GRAY OUND AREA
Nederlands STEPS TO INSTALLING

Drilling the pilot hole

You will need a half-inch spade bit and power drill, or a special rotary cutting tool for this step. WARNING: Use eye protection and be sure to observe all safety precautions while using a drill or cutting tool (Figure 8). Figure 8
Caution against drilling without eye protection
WARNING: Make sure the spot chosen is safe for cutting. Do not cut through surfaces that may have hazards such as electrical wiring, conduits, or plumbing concealed behind them. Follow all other safety precautions. 1. 2. Center the tip of the drill bit in the top circle you have drawn. Drill completely through the wallboard to create a hole that you can probe behind.
Note: If you encounter insulation in the wall, it will be difficult, or impossible, to probe behind the pilot hole. If you are certain that your chosen location is free of hazards and impediments, you may choose to cut the hole for the speaker anyway, remove some of the malleable insulation, and proceed from there. Refer to Prepare the wall for inserting the speaker on page 13. 3. Figure 9
Using a spade bit with a power drill to create the pilot hole
Drill the second hole just below the first one (Figure 9). This elongates the hole to allow for testing the space for the length of the speaker enclosure.
Testing the space behind the hole
You need a tape measure and a sturdy wire (such as a straightened coat hanger) 22 in. (55.9 cm) in length for this step. 1. Figure 10
A 22-inch (55.9 cm) length of sturdy wire bent in two places 3 in. (7.6 cm) 4 1/8 in. (10.5 cm) 4 3/4 in. (12 cm) 141/4 in. (36.2 cm)
Bend the wire as shown in Figure 10.
For greater accuracy, make the first bend a little long, measure again, and cut off the extra length at that end. WARNING: If there is any possibility of electrical wiring in the space behind the wallboard, wrap the wire with electrical tape to prevent electric shock. 2. 3. Make a mark 41/8 in. (10.5 cm) from the short end as an indicator of the proper front-to-back depth of the hole. Use the bent wire to test for enough depth, front-to-back: Insert the short end of the wire into the hole and straight back (Figure 11). Probe to make sure nothing is in the way to a depth of 41/8 in. (10.5 cm). This indicates that the space behind the wallboard is deep enough for the front-to-back speaker dimension.

Figure 11

Checking the space for the depth of the speaker
1 " 4 / 8 m) 5c (10. 1 " 4 / 8 m) 5c (10.
If the wire goes in without a problem, proceed to step 4, below. If you cannot insert the wire to the 41/8-inch (10.5 cm) mark, you need to drill a new pilot hole elsewhere. Then repeat step 3. 4. Use the wire again to test the width, side-to-side: With the short end still in the hole, reposition it, as shown in Figure 12 on page 12, and rotate it 360 around the hole. This indicates if the wall space is wide enough on each side of the hole for the side-to-side dimension of the speaker.
Nederlands STEPS TO INSTALLING Figure 12
Checking the space for the width of the speaker 360
If the wire goes around the 360 arc without a problem, proceed to step 5 below. If you cannot rotate the wire all the way around up to the first bend, you need to drill a new pilot hole elsewhere. Then repeat the preceding steps 3 and 4. 5. Use the bent wire to check for enough length below the hole: Holding the short end of the wire, insert the long end into the wall or ceiling and straight down from the hole (Figure 13a). You may want to use the template for this step, as shown in Figure 13b. With the long end of the wire still in the hole, sweep it from side to side in a curve as shown on the template. This indicates if the wall or ceiling space is long enough and wide enough at the far end. When testing for length, move the wire near the wall or ceiling, then farther back from it (as in Figure 13a, below). Figure 13
Inserting the long end of the wire (a) and sweeping from side to side to check the length (b) (a) (b)
TAPE HERE WA RN surfac ING : con es thaMake cea before led t hav sure the you behinde hazard spo procee the s, t cho m. suc d. If you h assen is saf

9" (22.9 cm

are electri e for WAR not cal cut wirin NING: sure, wir ting g, cond Mak con ing, con. Do uits e sure WAR or plumthe 8 1/ sult dui not drillin NING: a pro ts cut bingspot chos 16" (20 conc g. Do Mak , conc en fessioor plu throug TA.5 cm eale is safe Tran condealed not cut e sure d behi for slatio nal mbing h HEPE ) prof uits orbehindthroughthe spot cutti nd them ng. ns belo essi plum them surfa chos install , onal bing , such ces en RE. If Do not w insta. If that is er ller you as elec havesafe for you are cut befo are trica haza not through 5 1/ re you not l wirin rds sure surfa , cons procsure, cons g, 2" (14 eed. ult ult a ces that cm) prof have a WAR essi haza WAR onal drilli NING: spot NING insta rds, such ng. conc Do Mak ller drillinchosen:Make befo as elec condealed not cute sure is surfag. Do not safesure the re you trica the for prof uits orbehind through spot concces that cut throu proc l essi plum them surfa chos eed. have onal bing , such ces en suchealed behin hazagh insta. If that is safe cond as elect d them rds ller you as elec have for ric befo are trica haza are uitsorplumal wirin , re you not sure l wirin not profe sure bing. g, proc , cons g, rds , cons you ssionalins ult Ifyou eed. ult WAR proc taller a a WAR ford NING eed. : Mak befo sure NING: hazaril ing. Don esur re the is safe spotMake elect rds conc otcu ethe chos not for drillin are rical wirinealed tthroughspot chos en cut behi surfa thro g. Do befonot sure g, cond nd surfa en is ugh re you , cons uits them cest safe hazaces that , proc ult a or plum suchhathave behi rds conchave eed. profe bing as nd ssion. as elec them eale If al insta you cond trica , suchd ller plumuits or l wirin g, not bing. sure If you profe , cons are befo ssional ult re you insta a ller TAPE WAR proceed. chos NING: HERE Mak thro en is safe ugh conc surfa fore sure elec ealed ces drilling.the spot trica behi Do If you l wirin ndthat have not them prof are notg, cond , haza cut such processional sure uits or asrds eed. insta , cons plum Eng ller ult a bing lish befo. & Tra re you nsla tion s 141/ 2" (36

Position the template carefully over the pilot hole where you want to install one speaker. Make sure the template is level (Figure 14).

Pilo t

9" (22

/2" )

DO C U N OT TA GR R OU N AY AR D EA
DO C U N OT TA GR RO U N AY AR D EA

Carpenters level

DO C U N OT TA GR R O U N AY AR D EA
DO C U N OT TA G R R O UN AY AR D EA
DO C U N OT TA G R R OU N AY AR D EA
Tape or hold the template firmly in place as you trace around the sides and upper edge of the WHITE CUT-OUT AREA portion.
Nederlands STEPS TO INSTALLING 4. 5.
Make a dotted line, using the slotted holes along the bottom of the WHITE CUT-OUT AREA portion, for the bottom edge of the hole. Remove the template.
If necessary, use tape to hold the template temporarily in place (see TAPE HERE on the template). Then run your pencil along the entire template edge, except where there is tape.

Cutting the speaker hole

You need a small saw or specialized cutting tool (for example, a keyhole or drywall saw) for this step of the installation. WARNING: Use eye protection (Figure 15) and be sure to observe all safety precautions while using the saw or cutting tool. Figure 15
It is best to drill holes inside each corner of the rectangular outline you have drawn, before you begin cutting. Insert the blade into the pilot hole and cut down and at an angle until you reach one pencil line.
While it is important to cut carefully, remember that the speaker frame overlaps the wallboard by 1/4 inch (0.6 cm) when the speaker is in place. Minor cutting inaccuracies will be hidden behind that frame. 2. 3. 4. Figure 16
Cutting along the outline (a), and using a finger to hold the cutout piece (b) (a)
Cut around three of four sides of the drawn outline, not all the way around (Figure 16a). Hook your finger into the pilot hole to keep the wallboard from falling behind the wall, and then make the final cut (Figure 16b). Using your finger, pull out the piece of wallboard you have just cut.
WARNING: Keep fingers away from the cutting blade.
If you encounter insulation behind the wall You can expect to find insulation in an exterior wall and sometimes in an interior wall. If the insulation found there is malleable, you can cut and remove some of it from both above and below the speaker hole to make room for the speaker. Other types of insulation will be difficult or possibly dangerous to handle. CAUTION: Beware of hidden nails when reaching into the wall to remove insulation. CAUTION: Wear gloves and protection for your mouth, nose, and eyes before handling insulation that contains fiberglass.

Reorienting or changing speaker frames
Reorienting the rectangular frame logo
If you intend to mount a rectangular framed speaker upside-down due to a lack of space below the hole, you will need to reorient the logo before inserting it into the hole. To do this, remove the frame from the speaker, rotate it 180, and reattach the frame. There are four frame screws, labeled GRILLE, that hold the frame in place (See Figure 17 below and Figure 23 on page 18). Do not confuse them with the dogleg clamp screws that are labeled WALL. Do not insert the speaker into the wall without a frame attached. The frame keeps the speaker from falling into the wall. Figure 17
Replacing the rectangular speaker frame with the round frame
Installing round speaker frames
If you intend to use round speaker frames, install them now by removing the four screws that hold each rectangular frame and using them to secure the round frames (Figure 17). The logo is on the round speaker grille, which will be positioned later.
Insert and wire the speaker
You need a Phillips-head screwdriver and optional tape to complete this step. If your wall is not pre-wired, refer to What to do when the room is not pre-wired on page 24. When wire is within reach of the hole you have cut, follow the procedure below: 1. From inside the newly cut speaker hole, locate and pull out 14 in. (36 cm) or more of the pre-wired speaker cord (Figure 18 on page 16).
Nederlands STEPS TO INSTALLING Figure 18
Pulling the wire up and out, to the left (a) and securing it with tape (b).
At least 14 in. (36 cm) of wire
Use tape to temporarily affix the loose end of the wire above and to the left of the hole (Figure 18b). This keeps the wire out of the way until you have the speaker partially inserted in the wall and are ready to make the connections.
Insert the speaker into the opening
Before you follow the steps below, check to be sure none of the dogleg clamps (two on each side) are protruding from behind the frame of the speaker. If they are, press them back behind the frame so the speaker will fit into the hole. Loosen the screw terminals on the upper left side of the speaker before inserting the speaker into the hole to save effort in making the connections. 1. 2. Figure 19
Partially inserting the rectangular-faced or roundfaced speaker Wall stop
Use both hands to support the speaker and angle it slightly, so it is diagonal to the hole. This allows clearance for the wall stops. Insert the bottom of the enclosure through the hole and down part of the way or up, depending on your clearance issues (Figure 19).
Leave the speaker in this partially inserted position, resting on the wall stops that prevent it from falling out (Figure 20). This allows ready access to the connection terminals on the upper left-hand side of the speaker.

Attaching round grilles

1. 2. 3. Line up the Bose logo in the desired position. Tuck the Bose logo into the speaker frame first. See Figure 25. Work your way to the top of the grille frame, using both hands to tuck the grille tabs into the frame. Be careful not to permanently bend the grille tabs.
Note: When the grille is inserted into the frame, the logo can not be re-positioned. Take care to insure it is in the desired position before pressing the entire grille into the frame. Figure 25

Painting the speakers

The grille and frame of your Virtually Invisible 191 speakers can be painted before or after the speaker is installed. This is optional, however, and Bose cannot be responsible for the quality of adhesion or finish of non-factory applied paints. There are different techniques for painting the grille and painting the frame. Be sure to use paint that is appropriate to the technique you choose. WARNING: Follow all recommended safety procedures for the chemicals involved. This includes the proper use of eye protection, ventilation systems, respirators or filter masks, and fire safety equipment if flammable solvents are used.

Painting the grille

It is important to prevent paint from clogging the grille perforations, which can adversely affect performance. You can use a dry brush technique or spray paint the grille. However, do not use a paint roller: Remove the grille from the speaker if it has been installed. Before you begin to paint, clean the grille to remove possible contaminants. Even fingerprints can prevent uniform coverage. Check to be sure the paint is distributed evenly and covers the grille thoroughly. If not, you may need to paint the inside of the grille to fix the problem. When it is dry, protect the painted grille with a clean cloth or tissue paper until you attach it to the speaker. Using a dry brush technique Unthinned latex paint is appropriate for this method. Be sure to put down enough paper to cover your work area and allow for repeatedly blotting the brush. 1. 2. 3. Dip the tip of a clean, dry brush in the paint. Stroke across the paper to reduce the amount of paint on the brush. When you can see individual bristle marks, the brush is ready to use on the grille. Stroke lightly back and forth on the front of the grille, in a horizontal direction, until you need more paint.
If paint clogs any of the grille perforations, try angling your stroke to unclog it, or blow gently on the clog. 4. 5. Repeat the above steps until the outside of the grille is completely covered. Turn the grille 180 and repaint the entire surface using back-and-forth strokes again.

Where the walls are finished
Here are some suggestions for how to make this job easier. Look for ways to conceal cord outside the walls (See Figure 27): Along or behind baseboards Under carpets (using special flat speaker cord for under-the-rug speaker runs) Under doorjambs. Figure 27
Running cord behind baseboards and a doorjamb
What to do when the room is not pre-wired
In this case, you will need to run speaker cord from the receiver or amplifier through the wall to the area you have chosen for installing the speakers. You will need to mount an open-backed junction box in the wall near the receiver or amplifier (Figure 28). You also need to observe safe and practical standards: WARNING: Make sure the spot chosen is safe for drilling. Do not drill through surfaces that may have hazards, such as electrical wiring, conduits, or plumbing concealed behind them. Follow all other safety precautions. WARNING: Consult local building codes to inform yourself of the requirements in your area. Figure 28
An open-backed junction box that allows cord to come through the wall near the receiver or amplifier
Use a drill bit large enough for the cord you will pull through the holes. Use an auger bit, if possible, to make the work of drilling multiple holes less tiring. Do not drill through a load-bearing beam. Consult the building contractor if this is an issue. Keep cord 3 to 4 ft. (1 to 1.3 m) away from electrical cord, which can create a hum or buzz in the speakers. See Figure 29 on page 25. To avoid nails, drill holes in the center of each stud or joist. Use a nail plate to protect the cord if your only option is to notch a stud or joist. Line up holes as perfectly as possible to make pulling the cord through easier. Pull the cord so there are no sags but do not pull tight enough to create tension. Find the easiest path for cord that must run behind the wallboard: Choose interior walls, which are less likely to have insulation packed behind the wallboard. Use an attic or basement run where possible, so you have easy access and can see where plumbing, electrical wires, and other impediments occur. In slab construction, consider using plenum-rated wire run through heating or air conditioning vents.

The bass or treble is weak Only one speaker plays
Only one speaker still plays

Customer service

For additional help in solving problems, contact your Bose dealer. Or, to contact Bose Customer Service, refer to the address list included in the carton.

Warranty period

Bose Virtually Invisible 191 speakers are covered by a limited 5-year transferable warranty. Details of coverage are on the warranty card that came with your speakers. Please fill out the information section, detach, and mail it to Bose.

Accessories

Drop Ceiling Kit for two speakers Protects the tile from bearing the weight of the speakers. Instructions included. Rough-in Kit for two speakers Reserves a place for the speakers after the studs are in place and before the wallboard is added, and indicates where the wallboard hole should be made. Instructions included. For further information or to order accessories, contact your Bose dealer. Or, to call Bose directly, refer to the address list included in the carton.

Technical information

Features Virtually Invisible and Articulated Array speaker design Proprietary enclosure technology Stereo Everywhere speaker performance Paintable grille Syncom computer tested Compatibility Compatible with amplifiers or receivers rated 10-100W per channel/rated 4 to 8 ohms 50W IEC continuous power handling; rated 6 ohms Driver complement Two (2) 21/2" (6.4 cm) full-range drivers per speaker Enclosure Ported and molded high-impact polystyrene White frame and grille Dimensions Each speaker: 133/4"H x 77/8"W x 37/8"D (34.9 cm H x 19.9 cm W x 9.8 cm D) Wall or ceiling surface area required for each: Rectangular-faced speaker 83/4"W x 6"H (20.5 cm x 14 cm) Round-faced speaker 111/4" diameter (26 cm) Weight 4.5 lb. (2.0 kg) each

SICHERHEITSHINWEISE

Wichtige Sicherheitshinweise
Lesen Sie diese Anleitung vollstndig durch, bevor Sie mit den Arbeiten beginnen. Schtzen Sie Ihre Erfahrung im Umgang mit den Werkzeugen richtig ein, und beachten Sie die hier erwhnten Vorsichtsmanahmen. Wenn Sie sich nicht sicher sind, ob Sie die Installation durchfhren knnen, wenden Sie sich an den Hndler, bei dem Sie das Produkt gekauft haben, an einen Elektrotechniker oder an einen qualifizierten Fachbetrieb fr Audio/VideoInstallationen. Beschreiben Sie die durchzufhrenden Arbeiten, und holen Sie einen Kostenvoranschlag ein, bevor Sie entsprechende Dienstleistungen in Auftrag geben. WARNUNG: Die Installation muss in bereinstimmung mit den jeweils gltigen Regelungen des National Electrical Code, ANSI/NFPA 70, und/oder des National Fire Alarm Code, ANSI/NFPA 72, ausgefhrt werden. Die Verkabelungsart und rumliche Abtrennung muss so erfolgen, dass der Betrieb des Lautsprechers nicht gestrt wird. ACHTUNG: Informieren Sie sich ber die rtlichen Bauvorschriften, bevor Sie mit der Installation beginnen. ACHTUNG: Dieses Produkt ist nicht fr die Verwendung in Luftkammern gedacht. ACHTUNG: Wenn die Anweisungen in dieser Anleitung nicht befolgt werden, kann die Garantie der Lautsprecher verfallen.

Hinweis: Sie sollten jetzt die Seriennummern, die Sie jeweils auf der Rckseite der Lautsprecher finden, auf der Garantiekarte und unter Fr Ihre Unterlagen auf Seite 2 eintragen.
Vorrichtungen zum Sichern des Lautsprechers in Wnden oder Decken befinden sich direkt am Lautsprecher. Sie bentigen allerdings weitere Gegenstnde und Werkzeuge, um die Lautsprecher zu installieren (Abbildung 3).
Weitere bentigte Materialien
CU DO T N GR AR OT AY OU AR ND EA CU DO T N GR AR OT AY OU AR ND EA

Lautsprecher

Gegenstnde zum Installieren der Lautsprecher entsprechend den Anweisungen
Inhalt des Kartons: 2 Lautsprecher, rechteckige Rahmen vormontiert 2 rechteckige Lautsprechergitter 1 rechteckige Abdeckung 1 Schablone 2 runde Lautsprecherrahmen 2 runde Lautsprechergitter 1 runde Abdeckung

Auspacken

Abbildung 2

Abbildung 3

spitzer Bleistift
PhilipsKreuzschlitzSchraubendreher

Schablone

Bandma

Lochsge****

Seitenschneider/ Abisolierwerkzeug
pro d ha the WA wiri RN ce the za ng, ING ed m. rds sp WA con :. If , su ot drill RN duit Mak yo ch chos con ing.D ING s e sure or u are as en con cea : plum the pro duit led ono Mak fess s beh tcu e sure bing spo no ele is tthr , t io or t su ctri safe nal plum ind oug the con chosen 81 cea i bingthem hsu re, cal for / nstalle. If , suc rfacspot cho led behis safe 16 " co wirin cuttin r befo you h est /" (20 sen ind for Tran ns g, as 2 (14 re are elec hat hav is them cutt slati ult co g.5 WA spo RNI cm you pronot suretrica ehasafe for. If ing. ons cm a pro nd Do drilli tch NG: you Do belo ) uit no cee , l wiri zard ) surf ng. ose Mak fes s t cu are not w d. con ng, s con ace Do nis esu sult not cut thro sio or plu t suc cea sth not safe a sure ugh na mb thr con has ledbe ath cut fo reth ou , con surf WA are duits elec ave througr e l in fo RNI prof not orp tr hind haz h sta ing, gh WA sult ace haz rdril NG you ess sure lu icalw them, ards a s drill RN le elec ards ing.D :Ma proc ional ,co mbing. irin con in ING professthat r are tri con ono kes eed install nsu If g, hav con cea g. Do : befo not calw cea tcu ure ional e. erblt a you pro duit led not Mak haz rey sure iring,c ledbetthr th fess s beh cut e sure in ard efor oup ,co ond oug esp stal e ionalor plum ind thro le s, suc roce nsu uitshind hsu otchos the instal bingthem ugh spo r befo h ed. lt apr orp them, rfacest eni as surf ofes lu suc hat ssa ler. If , suc ace t cho re you elec sion mbing. has hav fe befo you h as s sen pro trica alin I e re are elec that is you not trica hav safe cee l stal f you d. ler pro sure l e for haz WA cee , conwiri ard sure RN d. sultng, s is t ING a not safe hesp : surf cut fordr otc Mak haz ace thro il hos e beh ard s ugh ing.D en as in s that o con elec d themcon hav plum duit trica cea e not bing s l , suc led pro sure or wiri h befo fess ,. Ifyo ng, con uar re io WA you nal i sult e cho RN pro nstal a thro sen ING cee le r con ugh is : d. elec cea surf safe Mak If tr le ace for e sure pro you icalw d beh s drill pro fess are irin in that ing.Dthe cee io not g,c d them hav spo ono t d. nal sure ond instal , uits , suce haz tcu con ler sultorp h as ard t befo lumbi s re a ng. you

Uso de la plantilla

Necesitar un lpiz afilado para realizar este paso. La plantilla muestra dnde deben taladrarse dos orificios de prueba de 13 mm (1/2 pulg.) antes de realizar una apertura ms grande para el altavoz completo. A continuacin podr comprobar si el espacio que hay detrs del orificio es suficiente para el altavoz y si hay materiales que impiden la instalacin. Utilice las lneas de puntos del ngulo que va desde el orificio de prueba hasta las esquinas inferiores de la zona de NO CORTAR de la plantilla. Utilcelas como gua para comprobar que la zona que se encuentra debajo del orificio de prueba es lo suficientemente amplia para que quepa el altavoz. Colocacin de la plantilla 1. Seleccione un punto de la pared o el techo en donde desee situar el centro de la rejilla del altavoz. Deje espacio suficiente para el altavoz encima y debajo del orificio de prueba. Puede que necesite esa segunda opcin si encuentra algn impedimento en el espacio situado debajo del orificio. 2. 3. 4. Figura 7
Preparacin para cortar un orificio de prueba Un mnimo de 22,9 cm (9 pulg.)
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Utilisation du gabarit

Pour cette tape, munissez-vous dun crayon bien taill. Le gabarit indique o percer deux avant-trous de 13 mm avant de raliser une ouverture destine accueillir lenceinte entire. Vous pourrez ainsi vrifier lespace entre ces trous pour vous assurer que lespace est suffisant pour accueillir lenceinte, et quil nexiste pas dlments pouvant empcher linstallation. Sur le gabarit, vous remarquerez des lignes en pointills formant un angle, qui relient lavant-trou et les coins infrieurs de la zone ne pas dcouper. Servez-vous en pour vrifier si lespace libre en dessous de lavant-trou est suffisant pour accueillir lintgralit du botier de lenceinte. Pour placer le gabarit : 1. Sur le mur ou le plafond, choisissez lemplacement sur lequel centrer la grille de lenceinte. Noubliez pas de prvoir suffisamment despace au-dessus et en dessous de lavant-trou pour accueillir le botier de lenceinte. En effet, vous devrez peut-tre installer le botier lenvers si lespace en dessous du trou comporte un obstacle (tuyau, cble). 2. Alignez les cercles des avant-trous sur lemplacement choisi en posant le gabarit bien plat sur le mur. 3. Tracez le contour intrieur des cercles laide dun crayon (Figure 7). 4. Retirez le gabarit. Figure 7
Prparation du perage dun avant-trou 22,9 cm minimum
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VIRTUALLY INVISIBLE 191 SPEAKERS

Nederlands

Italiano

Franais

Deutsch

English

SAFETY INFORMATION
Important words of caution
Please read this owners guide completely before you start. Then carefully consider your experience using the tools and taking the precautions referred to here. If you have doubts about doing this installation, you should contact either the dealer you purchased the product from, an electrician, or a professional audio/video installer. You can describe the job and request a cost estimate before committing to installation service. WARNING: Installation shall be in accordance with the applicable section of the National Electrical Code, ANSI/NFPA 70, and/or the National Fire Alarm Code, ANSI/NFPA 72, as applicable. The wiring method and compartment shall be such as not to interfere with the operation of the speaker. CAUTION: Consult local building codes before you get started with this installation. CAUTION: This product is not intended for use in Air-Handling Plenum Spaces. CAUTION: Failure to follow the instructions in this owners guide voids all warranties on your speakers.
Use these instructions with wood frame or similar construction only
Each speaker requires 81/16 in. (20.5 cm) of horizontal space, and 14 in. (35.6 cm) of vertical space inside the wall or ceiling, plus a minimum of 41/8 in. (10.5 cm) of depth from the face of wallboard that is a maximum of 3/4 in. (1.9 cm) thick. Bose recommends installing these speakers only in wood frame or similar construction where there is enough space between studs, as is found in 2 x 4 or 2 x 6 wall/ceiling construction. The instructions in this guide are specific to that type of installation only. Note: These speakers are not designed for installation in walls or ceilings of masonry.
Important Safety Instructions
1. 2. 3. 4. 5. 6. Read these instructions - for all components before using this product. Keep these instructions - for future reference. Heed all warnings - on the product and in the owners guide. Follow all instructions. Do not block any ventilation openings, install in accordance with the manufacturers instructions. Only use attachments/accessories specified by the manufacturer.
Bose Virtually Invisible 191 Loudspeakers comply with the following specifications: This product conforms to the EMC Directive 89/336/EEC and to the Low Voltage Directive 73/23/EEC. The complete Declaration of Conformity can be found on <www.bose.com>.

For your records

Serial numbers are located on the center rear of each of the Virtually Invisible 191 speakers. Serial numbers:______________________________ and __________________________________ Dealer name:_______________________________________________________________________ Dealer phone:_____________________________Purchase date: __________________________ We suggest you keep your sales receipt and warranty card together with this owners guide.

Espaol

CONTENTS

INTRODUCTION

Before you begin. What makes this speaker better also makes it different.

PREPARATION

Unpacking. Other equipment you will need. Deciding on speaker placement. Three tips for determining speaker placement. Consider which shape you prefer for your speakers. Considering your wall type and the approach it requires. For placement in walls. For placement in ceilings.

STEPS TO INSTALLING

Before you make any holes. Drill a pilot hole for testing the wall space. Using the template. Drilling the pilot hole. Testing the space behind the hole. Passing the pilot hole test. Repairing a pilot hole. Prepare the wall for inserting the speaker. Measure and mark the hole to be cut. Cutting the speaker hole. Reorienting or changing speaker frames. Reorienting the rectangular frame logo. Installing round speaker frames. Insert and wire the speaker. Insert the speaker into the opening. Make the speaker connections. Test the speaker now. Position the speaker all the way into the hole. Secure the speaker to the wall. Attaching rectangular grille frames. Attaching round grilles.

REFERENCE

Painting the speakers. Painting the grille. Painting the frame. Help for the beginning installer. Optional items that will assist you:. Accessories that can help. Using speaker cord. Preparing the speaker cord. Before the wallboard goes up. Installing in a pre-wired room. Where the walls are finished. What to do when the room is not pre-wired. Installing in an exterior wall. Use special care in cutting through plaster and lath. Special considerations in cold climate regions. Troubleshooting. Customer service. Warranty period. Accessories. Technical information.

Before you begin.

CAUTION: Please be sure to read this guide carefully before you do any cutting. There are many factors to consider before proceeding with this type of installation. Thank you for choosing to install Bose Virtually Invisible 191 speakers. Innovative engineering and advanced design enable these speakers to deliver Bose quality performance for big impact in spite of their small size. Virtually Invisible 191 speakers feature an Articulated Array speaker configuration that delivers the type of clear, lifelike sound and even coverage known as Bose Stereo Everywhere speaker performance.

ITE CU T OU T

* Carpenters level is suggested for use when installing speakers in a wall. ** Speaker cord specifications are provided in the Reference section of this guide. *** Painters tape or other tape with light adhesive that will not damage paint or wallpaper. **** Cutting tool For drywall: a keyhole saw, drywall saw, rotary cutting tool, or jigsaw. For plaster and lath: a saber saw or a rotary cutting tool.

Circular paint shield

Carpenters level*
Sturdy wire (such as a coat hanger) that is 22 in. long

Round speaker frames

Half-inch spade bit

Painters tape***

Rectangular speaker grilles

Rectangular paint shield

Power drill

Protective eyewear

WH AR EA

Nederlands PREPARATION

Deciding on speaker placement
The design of your new Virtually Invisible 191 speakers makes them well-suited to either wall or ceiling installation. The location you choose will affect the procedure for installing them. Consider the options below, then follow the instructions that apply to your choices: How you will use the speakers? for stereo sound at the front of a room or seating arrangement, or as home theater front speakers or surround sound rear speakers What surface will you install them in? an interior wall (abutting another room), or exterior wall (abutting outside), or ceiling in finished (plaster and lath or wallboard), or new construction
Three tips for determining speaker placement
1. The template can be placed against a wall or ceiling to help determine the amount of space the speaker will need. Each speaker enclosure extends into the wall or ceiling, as shown in the gray DO NOT CUT area on the template (Figure 4). In a wall, the speaker may be inserted either up or down and will extend either above or below the grille. Use of a stud finder can help ensure that the speaker hole is at least 43/4 in. (12 cm) from a stud or joist. All electrical wiring, vents and plumbing pipes located inside the walls must be avoided (Figure 5 on page 7). Check with a trained professional to learn how to locate and avoid them.

Note: To prevent problems with condensation in cold climates where a humidifier is used, avoid inserting the speaker upside-down in an exterior wall. Figure 4
TAPE HERE TAPE WARNING: Make sure the spot chosen is safe for cutting. Do not cut through HERE surfaces that have hazards, such as electrical wiring, conduits or plumbing, concealed behind them. If you are not sure, consult a professional installer before you proceed. 8 1/16" (20.5 cm)
Translations below WARNING: Make sure the spot chosen is safe for cutting. Do not cut through surfaces that have hazards, such as electrical wiring, conduits or plumbing, concealed behind them. If you are not sure, consult a professional installer before you proceed. WARNING: Make sure the spot chosen is safe for drilling. Do not cut through surfaces that have hazards concealed behind them, such as electrical wiring, conduits or plumbing. If you are not sure, consult a professional installer before you proceed. WARNING: Make sure the spot chosen is safe for drilling. Do not cut through surfaces that have hazards concealed behind them, such as electrical wiring, conduits or plumbing. If you are not sure, consult a professional installer before you proceed.

5 1/2" (14 cm)

WARNING: Make sure the spot chosen is safe for drilling. Do not cut through surfaces that have hazards concealed behind them, such as electrical wiring, conduits or plumbing. If you are not sure, consult a professional installer before you proceed.

TAPE HERE

DO NOT CUT AROUND GRAY AREA
English & Translations ranslations
141/2" (36.9 cm) 9" (22.9 cm)

WHITE CUT OUT AREA

FOR CUTTING Large white area represents what to cut out for the speaker face.
NOT FOR CUTTING Large gray area represents space to reserve behind the wall for the speaker enclosure.
CAUTION: When installed, the speaker enclosure cannot be seen behind the wall or ceiling. Do not attempt to nail, cut, or drill on that surface area. Puncturing the speaker enclosure with a tool will seriously damage the speaker. Figure 5

Using the template

You will need a sharp pencil for this step. The template shows where to drill two 1/2 in. (13 mm) pilot holes before you make an opening large enough for the entire speaker. You can then test the space behind the hole to make sure there is enough room for the speaker and that there are no materials blocking the installation. Notice the dotted lines extending at an angle from the pilot hole to the bottom corners of the DO NOT CUT area on the template. Use them as a guideline to be sure there is enough room below the pilot hole for the length and width of the speaker enclosure. To position the template 1. Select a spot on the wall or ceiling where you want the center of the speaker grille. Allow enough space for the speaker enclosure both above and below the pilot hole. You may need that second option if you find an impediment in the space below the hole. 2. 3. 4. Figure 7
Preparing to cut a pilot hole At least 9" (22.9 cm)
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DO CUT NOT AR GRA OUND Y AR EA
DO CUT NOT AR GRA OUND Y AR EA DO CUT NOT AR GRA OUND Y AR EA DO CUT NOT AR GRAY OUND AREA DO CUT NOT AR GRA OUND Y AR EA
If the wire goes in and sweeps from side to side at the far end without a problem, proceed to the next major step: Prepare the wall for inserting the speaker on page 13. If you find an impediment below the pilot hole, and you are working in an interior wall, insert the wire upward. If there are no impediments above the pilot hole, you can install the speaker upside-down. If you are working in an exterior wall, installing the speaker upside-down is not recommended. In this case, if you find an impediment you need to drill a new pilot hole elsewhere. Then repeat the preceding steps 3, 4, and 5.
Passing the pilot hole test
If you have successfully determined that this location will work for one speaker, test the wall or ceiling for the second speaker before making any larger holes. Refer to Drill a pilot hole for testing the wall space on page 9 and repeat those steps. If the first speaker location is fine, but the second is not, you may want to relocate both speakers.

Repairing a pilot hole

To patch a pilot hole, fill it with spackle. Let the spackle dry, then add more until the hole is slightly overfilled. When it is thoroughly dry, sand the area to make it flush with the wall.
Prepare the wall for inserting the speaker
Use care in the steps that follow to ensure satisfaction with the end result. CAUTION: Now is a good time to reconsider your comfort level with this job. If you have doubts about cutting into or running cord behind the wall, it is best to stop here. Contact a professional installer, describe the job, and request a cost estimate before engaging the installers services. WARNING: If you believe insulation in a wall may contain asbestos, do not cut into the wall. Find a different location for installing the speakers instead.
Measure and mark the hole to be cut
You need a carpenters level, a sharp pencil, and optional tape with the template to complete this step. 1. 2. Figure 14
Making sure the template is straight
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Position the template carefully over the pilot hole where you want to install one speaker. Make sure the template is level (Figure 14).

Pilo t

9" (22

/2" )

DO C U N OT TA GR R OU N AY AR D EA
DO C U N OT TA GR RO U N AY AR D EA

Carpenters level

DO C U N OT TA GR R O U N AY AR D EA
DO C U N OT TA G R R O UN AY AR D EA
DO C U N OT TA G R R OU N AY AR D EA
Tape or hold the template firmly in place as you trace around the sides and upper edge of the WHITE CUT-OUT AREA portion.
Nederlands STEPS TO INSTALLING 4. 5.
Make a dotted line, using the slotted holes along the bottom of the WHITE CUT-OUT AREA portion, for the bottom edge of the hole. Remove the template.
If necessary, use tape to hold the template temporarily in place (see TAPE HERE on the template). Then run your pencil along the entire template edge, except where there is tape.

Cutting the speaker hole

You need a small saw or specialized cutting tool (for example, a keyhole or drywall saw) for this step of the installation. WARNING: Use eye protection (Figure 15) and be sure to observe all safety precautions while using the saw or cutting tool. Figure 15
It is best to drill holes inside each corner of the rectangular outline you have drawn, before you begin cutting. Insert the blade into the pilot hole and cut down and at an angle until you reach one pencil line.
While it is important to cut carefully, remember that the speaker frame overlaps the wallboard by 1/4 inch (0.6 cm) when the speaker is in place. Minor cutting inaccuracies will be hidden behind that frame. 2. 3. 4. Figure 16
Cutting along the outline (a), and using a finger to hold the cutout piece (b) (a)
Cut around three of four sides of the drawn outline, not all the way around (Figure 16a). Hook your finger into the pilot hole to keep the wallboard from falling behind the wall, and then make the final cut (Figure 16b). Using your finger, pull out the piece of wallboard you have just cut.
WARNING: Keep fingers away from the cutting blade.
If you encounter insulation behind the wall You can expect to find insulation in an exterior wall and sometimes in an interior wall. If the insulation found there is malleable, you can cut and remove some of it from both above and below the speaker hole to make room for the speaker. Other types of insulation will be difficult or possibly dangerous to handle. CAUTION: Beware of hidden nails when reaching into the wall to remove insulation. CAUTION: Wear gloves and protection for your mouth, nose, and eyes before handling insulation that contains fiberglass.
Reorienting or changing speaker frames
Reorienting the rectangular frame logo
If you intend to mount a rectangular framed speaker upside-down due to a lack of space below the hole, you will need to reorient the logo before inserting it into the hole. To do this, remove the frame from the speaker, rotate it 180, and reattach the frame. There are four frame screws, labeled GRILLE, that hold the frame in place (See Figure 17 below and Figure 23 on page 18). Do not confuse them with the dogleg clamp screws that are labeled WALL. Do not insert the speaker into the wall without a frame attached. The frame keeps the speaker from falling into the wall. Figure 17

Figure 20

Speaker held in place by wall stops Wall stop
Make the speaker connections
You need a Phillips-head screwdriver for this step. Pay attention to maintaining the proper polarity (+ to + and to ) with these connections. An error here will adversely affect speaker performance. Also be sure to tighten each screw securely, but not enough to cause undesirable compression of the wire. 1. 2. 3. If you have not done so earlier, loosen the screws on both terminals. Insert the end of the marked wire (+) into the positive (+) terminal and tighten the screw (Figure 21). Insert the end of the unmarked wire () into the negative () terminal. Tighten the screw.
CAUTION: Do not allow exposed wires to brush against each other, which could damage your components. Trim excess wire and reinsert as necessary. Figure 21
Attaching wires to the terminals

Test the speaker now

With the connections still within reach, now is a good time to test the speaker to make sure it functions properly before you secure it in the wall. It may be preferable to begin installing the second speaker now, before you test either one. When you get the second speaker connected, you can test both speakers, and make sure they are both functioning fine before proceeding with the installation steps for each one. CAUTION: If you are testing the first speaker before the other one is connected, make sure the wire to that first speaker is the only one connected to the receiver/amplifier. This prevents unattached speaker wires from making contact, which can damage the receiver/amplifier. To test the speaker: 1. Turn on the receiver/amplifier and play a piece of music that is familiar to you. 2. Listen for clarity and accuracy of the performance from one speaker. If you hear a problem, refer to Troubleshooting on page 27. If the performance sounds fine, test the other speaker, or continue with the installation steps for this speaker.
Position the speaker all the way into the hole
1. When the connections are completed, push any excess wire into the hole behind the speaker (Figure 22 on page 18).
Nederlands STEPS TO INSTALLING 2.
Make sure the frame of the speaker is firmly screwed onto the face. The frame prevents the speaker from slipping all the way into the hole. Refer to Figure 17 on page 15 if you need to reverse the frame to orient the Bose logo on the rectangular speaker face. Push the speaker into the hole until the face is straight and flush with the wall (Figure 22b).

3. Figure 22

Pushing excess wire behind the speaker (a) and Positioning the speaker all the way in the hole (b)
Secure the speaker to the wall
CAUTION: If you use a screw gun to tighten any screws, first select the guns lowest torque setting (do not exceed 2-4 inch-pounds or 0.2-0.5 N-m of torque). If the screw does not seat properly, finish installing the screw at the next highest torque setting, or by hand. When the speaker is positioned inside the hole with the face straight and flat against the wall, you are ready to tighten the dogleg clamp screws, labeled WALL, along the sides of the frame. The dogleg screws exert pressure from inside to hold the speaker firmly against the wall. Do not confuse the dogleg screws with those labeled GRILLE, which hold the frame. CAUTION: Although they should be thoroughly screwed down, be sure not to overtighten the dogleg screws. Too much compression can crush the wallboard, making it crumble. This creates uneven surface support and can leave gaps between the speaker face and the wall. 1. 2. Slightly tighten the four dogleg clamp screws (Figure 23) until each one begins to grip. This is caused by the clamps that swing out and press against the back of the wallboard. With your fingers grasping the frame of the speaker, rock it slightly back and forth into position. Check for even seating of the face before you tighten the screws any further, and adjust the speaker if it needs to be straightened.

Figure 23

Tightening the dogleg clamp screws

GRILL E WALL

WAL GRILL L E
When the speaker is straight, tighten each screw.
Attaching rectangular grille frames
1. 2. Line up the curved edge of the grille with the curve over the Bose logo and press that edge into the speaker frame first (Figure 24). Press the top of the grille firmly into place until you feel some resistance. When the grille lines up flush with the frame of the speaker, it is seated properly.

Figure 24

Snapping the grille into place
If the speaker looks crooked When you step back from the wall, you may notice that the speaker is not straight. If so, it is easy to adjust the speaker slightly: 1. 2. 3. 4. 5. 6. Remove the grille by inserting a thin-bladed tool between the speaker frame and the grille and carefully prying it out. Slightly loosen each of the four dogleg clamp screws, labeled WALL. Press on the sides of the speaker frame to shift it up or down into the proper position. Stand back to make sure it is straight. Repeat step 3 if it is not. Tighten all four dogleg clamp screws. Reattach the grille to the front of the speaker.

Attaching round grilles

1. 2. 3. Line up the Bose logo in the desired position. Tuck the Bose logo into the speaker frame first. See Figure 25. Work your way to the top of the grille frame, using both hands to tuck the grille tabs into the frame. Be careful not to permanently bend the grille tabs.

Note: When the grille is inserted into the frame, the logo can not be re-positioned. Take care to insure it is in the desired position before pressing the entire grille into the frame. Figure 25

Painting the speakers

The grille and frame of your Virtually Invisible 191 speakers can be painted before or after the speaker is installed. This is optional, however, and Bose cannot be responsible for the quality of adhesion or finish of non-factory applied paints. There are different techniques for painting the grille and painting the frame. Be sure to use paint that is appropriate to the technique you choose. WARNING: Follow all recommended safety procedures for the chemicals involved. This includes the proper use of eye protection, ventilation systems, respirators or filter masks, and fire safety equipment if flammable solvents are used.

Painting the grille

It is important to prevent paint from clogging the grille perforations, which can adversely affect performance. You can use a dry brush technique or spray paint the grille. However, do not use a paint roller: Remove the grille from the speaker if it has been installed. Before you begin to paint, clean the grille to remove possible contaminants. Even fingerprints can prevent uniform coverage. Check to be sure the paint is distributed evenly and covers the grille thoroughly. If not, you may need to paint the inside of the grille to fix the problem. When it is dry, protect the painted grille with a clean cloth or tissue paper until you attach it to the speaker. Using a dry brush technique Unthinned latex paint is appropriate for this method. Be sure to put down enough paper to cover your work area and allow for repeatedly blotting the brush. 1. 2. 3. Dip the tip of a clean, dry brush in the paint. Stroke across the paper to reduce the amount of paint on the brush. When you can see individual bristle marks, the brush is ready to use on the grille. Stroke lightly back and forth on the front of the grille, in a horizontal direction, until you need more paint.
If paint clogs any of the grille perforations, try angling your stroke to unclog it, or blow gently on the clog. 4. 5. Repeat the above steps until the outside of the grille is completely covered. Turn the grille 180 and repaint the entire surface using back-and-forth strokes again.

Using speaker cord

Before you cut any cord, estimate how much will be needed by measuring the distance from the receiver/amplifier to where each speaker will be installed. Make some allowance if the cord must go around corners or through walls, and leave at least 14 in. (36 cm) of cord to pull from the wall for making the connections easily. Allow extra length if you are installing ceiling speakers, so that you can make connections while standing on the floor. Wire recommendations.
Gauge 18 AWG (0.82 mm2) 16 AWG (1.3 mm2) 14 AWG (2.1 mm2) Maximum Length 20 ft (6 m) 30 ft (9 m) 50 ft (15 m)
Preparing the speaker cord
Speaker cord consists of two insulated wires. The insulation around one wire is marked (striped, collared, or ribbed) to identify it as positive. The other wire is negative. Note: It is sometimes difficult to distinguish wire markings. Inspect both wires carefully. 1. 2. Strip approximately inch (13 mm) of insulation from both wires. You will need a wire cutter and wire stripper for this work. Twist the bare end of each wire so loose strands will not touch across terminals.
Be sure to connect each wire to the proper terminal, positive to positive (+) and negative to negative ().
Before the wallboard goes up
There are some standard guidelines for working in unfinished construction. Begin this work after the studs and joists are in and the electrical wiring is completed. Snap a chalk line across the face of the studs or the bottom of the joists and move backward as you drill, so you can keep the last hole drilled in your line of sight.
Never run speaker cord and electrical cable through the same hole or into the same junction box. If a short section of the cord must run parallel to nearby electrical cable, keeping that run to the absolute minimum will result in less interference. Use metal conduit or shielded speaker cord if the cord must run next to electrical cable for 10 ft. (3 m) or more. Use cable clamps or large wire staples to fasten the cord to a joist or stud wherever the cord runs more than 41/2 ft. (1.4 m) from a hole. Use protective guard strips, raceways, or conduits to protect the cord from being stepped on or compressed in an attic or crawl space.

Figure 29

Techniques to use for running speaker cord through studs or joists Studs

Wire Staple Nail plate

3-4 (1-1.3m)

Speaker cord

Plumb line for chalk mark

Electrical wire

If you must route cord around a corner, you will need to cut out a rectangular piece of wallboard on either side of the joist at that corner. Use each regular-shaped cutout as the patch for the wall when you finish. By reaching through the cutout, you can notch the joist to make room for the cord and use nail plates to cover the cord in each notch (Figure 30). Figure 30
Running cord around a corner with nail plates for protection (a) and cutout pieces as patches (a) Nail plates Ceiling Wall Wall Electrical wire (b) Cutout pieces

Ceiling Wall Wall

To patch the wall, reposition the cutout pieces and use joint tape and joint compound to hold them in place. When they are dry, sand and paint the area to match surrounding surfaces. It is common to run cord from a speaker location in a wall or ceiling to the attic and through the wooden top plate that runs horizontally across the top of the vertical studs. You can then run the cord to the spot above the junction box near the receiver or amplifier. Drill through the top plate at that point and route the cord through the hole and down into the wall (Figure 31). Figure 31
Running the cord up through the attic Top plate

Open-backed junction box

Installing in an exterior wall
If you choose to install these speakers in an exterior wall (abutting the outside of your house), you may encounter insulation behind the wallboard. This can complicate the installation, requiring you to trim and push malleable insulation out of the way. You will need to wear eye protection and gloves for working with fiberglass insulation. WARNING: If you believe the insulation inside a wall may be composed of asbestos, do not cut into the wall. Choose a different location for the speakers instead. Insulation will also impede your use of a pilot hole to test the size of the space behind the wallboard. Doing such a test is recommended to make sure the space is large enough before cutting a speaker-sized hole.
Use special care in cutting through plaster and lath

For wall construction of plaster and lath, use special care to prevent plaster from cracking: After you have drawn an outline of the hole to cut, tape around the outline and use a sharp blade to make shallow cuts where the hole will be. Then, within the outline only, chip the plaster away until you expose the lath underneath. Finally, cut through the lath very carefully. Using an electric sabre saw can be quick but risky. We recommend using a hand saw and proceeding cautiously to avoid damaging the surrounding plaster.
Special considerations in cold climate regions
With exterior wall installations in regions where outdoor temperatures dip below freezing for days at a time, using a humidifier can cause condensation to form inside the speakers. This can be more of a problem if the speakers are mounted upside down. If you must mount in an exterior wall: Avoid installing the speakers upside down. Leave some of the insulation between the speakers and the exterior wall. Refrain from setting the humidifier on high, especially when outside temperatures are below freezing.

Troubleshooting

Neither speaker plays Check the settings on your receiver/amplifier. Refer to the owners guide that came with it for instruction on settings. If your Virtually Invisible 191 speakers are the second pair of speakers connected to your receiver/amplifier, make sure the connections have been made to the B terminals and that the B speakers are selected to play. Check the tonal balance setting on your receiver/amplifier. Check for consistent polarity of the connections (+ to + and to ) to the receiver/amplifier and to the speaker. Review Make the speaker connections on page 17. Check the balance control on your receiver/amplifier and make sure it is centered. Check the wires connected to the speaker that does not play. Make sure the wires are in good condition and are firmly connected. Review Make the speaker connections on page 17. Trace the cord from the speaker in question to the receiver/amplifier. Disconnect the cord from the receiver/amplifier channel and reconnect it to a different receiver/amplifier channel. If the performance is now fine, the problem lies in the original receiver/amplifier channel, the component source of the music, or the connections between the receiver/amplifier and the source. Check all of those to make sure they are performing properly. Reconnect the speaker to the correct channel of a functioning receiver/amplifier. If the problem persists, its source is either the speaker wire or the speaker in question. Follow the next instruction. Disconnect the cord from the speaker in question and reconnect it to the second speaker. If the performance is now fine, the problem lies in the original speaker. Contact your authorized Bose dealer, who will arrange for service. Or, to contact Bose directly, refer to the address list included in the carton. If the problem persists, its source is the speaker wires. Follow the next instruction. Before you take steps to replace and re-run the speaker wire, recheck all of the connections. Then repeat the procedure for pinning down the problem source, above. Static or noise from one speaker Check the connections at the speaker and at the receiver/amplifier. Make sure the wires are in good condition, are firmly connected, and no wires are touching across terminals. Also check the connections from the receiver/amplifier to the component source of the music. If the problem persists, follow the troubleshooting instructions for Only one speaker still plays, above.