Bose 301 Series Speaker System User Manual
Contents
1. runs up to 25 feet and 16 gauge or thicker for longer runs Be sure the speaker wire does not rest or rub against any sharp or pointed objects The speakers should be mounted on a flat surface to form a good seal between the speaker flange and the mounting surface Each speaker is 8 ohms nominal When connecting more than two speakers per amplifier channel you should use series parallel wiring or line transformers In all cases make certain that the total impedance does not fall below the amplifiers minimum rating If you are not sure contact your Boston Acoustics dealer Use the cable clamp supplied to secure the speaker wire to the housing Press the clamp into one of the holes on the printed circuit board You Will Need 1 A utility knife an electric jigsaw or another means of cutting a hole in the mounting surface 2 Phillips and flat blade screwdrivers 3 A wire cutter or stripper for preparing the speaker wires 4 An awl or a small screwdriver to remove the speaker grille With the hardware supplied the speaker can be installed in existing walls and ceilings from 9 5mm to 1 2 38mm thick For thinner walls you will need to use spacers not provided for the mounting bracket In walls greater than 1 2 38mm thick you will need longer screws Installation 1 Make a cutout using the supplied template A BostonAcoustics 83 HOLE CUTTING T2. 251 261 Designer Series In Wall Speaker Systems 620 YB isz uo sog YSN UOPEH y spodu d ER 3h at i Boston BostonAcoustics com Specifications 251 261 Frequency Response 3dB 66 20 000Hz 58 20 000Hz Recommended Amplifier Power 10 100 watts 10 100 watts Nominal Impedance 8 ohms 8 ohms Sensitivity 1 watt 2 83v at 1m 89dB 90dB Tweeter 34 19mm dome 34 19mm dome Bass Unit 5 135mm copolymer 62 165mm copolymer Crossover Frequency 6500Hz 6200Hz External Dimensions HxW 9 x6 241 x 171mm 10 6 x7 268 x 197mm Mounting Hole Cutout HxW 8 x5 223 x 146mm 9 x7 251 x 181mm Mounting Depth from surface 2 67mm 2 73mm Description Boston Designer Series speaker systems are designed to be as accurate clean and musical as our free standing speakers The unobtrusive flush mount design makes them ideal for installation in walls or ceilings of rooms where space or decor make conventional speakers undesirable or inappropriate They can also be used for the front and or rear channels in a home theater system The front surface is provided with a matte white finish The speaker can be installed as is or can be painted to match the room environment using the supplied painting mask The speaker grille is removable and is made of epoxy painted galvanized steel Their smooth detailed sound comes from two highly refined driver
3. EMPLATE 97 223 223mm 251mm lt gt 5 y 146mm 7 181mm 2 Run the wire from the amplifier to the cutout Allow an extra foot of wire at the cutout Strip 2 12mm off the wire and tightly twist the wire strands together 3 Remove the speaker grille Carefully pry each corner with an awl or a small screwdriver 4 Prepare the speaker bracket assembly for installation as shown For new construction an optional bracket Model 35UB for the 251 Model 36CB for the 261 is available from your Boston Acoustics dealer 5 Route the speaker wire through the cable clamp and connect the wire to the speaker WARNING To prevent electrical shock hazard always switch off the amplifier or receiver when making connections to the speaker IMPORTANT Typically one side of the wire is smooth Connect this side to the black speaker terminal The other side has a rib or stripe Connect this to the red speaker terminal Connect wire at the amplifier in the same way Failure to do so will result in degraded sound 6 Install the speaker according to the diagram below IMPORTANT Do not overtighten the screws Doing so will break the frame and or make it impossible to insert the grille Listening Levels and Power Handling The power recommendation for the speakers assumes that you will operate the amplifier in a way that will not pr
4. elements a copolymer bass unit with butyl rubber surround for powerful bass and natural midrange and a inch dome tweeter that provides outstanding clarity and articulation The tweeter and bass unit are mounted close together in a point source configuration for excellent imaging and extremely broad uniform dispersion This is important because wide dispersion gives you the flexibility to install the speakers where they look the best high on the walls for example yet still project clear sound throughout the listening area Both drivers are built in Boston s state of the art production facility to be within 1dB of the labora tory reference perhaps the industry s tightest tolerance Installation Instructions IMPORTANT This manual assumes the installer possesses skill in the proper use of hand and power tools a knowledge of local building and fire codes and a familiarity with the environment behind the wall or ceiling in which the speakers will be installed Loudspeaker 251 261 10 6 268mm 7 4 197mm Side View L 2 miaj 27 3 d3mm Mounting Bracket Mounting Hole 9 83 143mm 223mm 5 pe 2 ABE 143mm 146mm 10Y2 97 8 267mm 251mm a ke 7 Ye aj 170mm 181mm Examine the contents of the package and verify that it con
5. n approximate idea of what the speakers will sound like in that location Listen for pleasing stereo image realistic stage height or balanced surround field coverage if using the speakers as rear channel surrounds Note if any objects in the room impede the sound path from the speakers to the listening area 12 18 inches 30 45cm lt lt Painting the Speakers If you intend to paint the speakers its best to do so before installation 1 Remove the speaker grille Carefully pry at each corner with an awl or a small screwdriver 2 Use the form fitting painting mask provided to paint the housing Cover the slots with masking tape 3 After painting remove the mask by carefully inserting a screwdriver into the slots Do not puncture the drivers behind the mask with the screwdriver 4 When painting the grilles be certain that the paint does not fill the perforated holes in the metal If using spray paint use two thin coats If using house paint or other canned paint thin the paint to avoid filling the holes Use masking tape to cover slots Preparing for Installation Map out the wiring paths from the speakers to the amplifier We recommend 18 gauge wire for
6. oduce distortion Even our rugged speakers can be damaged by an amplifier if it is producing distortion If you hear a harsh gritty noise turn down the volume Prolonged or repeated operation of your speaker with a distorted signal from the amplifier can cause damage that is not covered by the warranty Limited Warranty For one year from the date of purchase Boston Acoustics will repair for the original owner any defect in materials or workmanship that occurs in normal use without charge for parts and labor Your responsibilities are to use the system according to the instructions supplied to provide safe and secure transportation to an authorized Boston Acoustics service representative and to present proof of purchase in the form of your sales slip when requesting service Excluded from this warranty is damage that results from abuse misuse accidents shipping or repairs or modifications by anyone other than an authorized Boston Acoustics service representative This warranty is void if the serial number has been removed or defaced This warranty gives you specific legal rights and you may also have other rights which vary from state to state If Service Seems Necessary First contact the retailer from whom you purchased the speakers If that is not possible write to Boston Acoustics Inc 300 Jubilee Drive Peabody MA 01960 U S A We will promptly advise you of what action to take If it is necessa
7. ry to return your speaker to the factory please ship it prepaid After it has been repaired we will return it freight prepaid in the U S and Canada Boston BostonAcoustics com 300 Jubilee Drive Boston and Boston Acoustics are registered trademarks of Boston Acoustics Inc Peabody MA 01960 U S A Specifications subject to change without notice 978 538 5000 1998 Boston Acoustics Inc 42 955 0
8. tains the following Quantity Description Designer Series Speakers N N NN N Mounting Bracket Painting Mask Metal Grille Template Instructions 1 Hardware Package Owners Manual lnstallation Hardware Package Contents Quantity Description 12 8 32 x 2 Screw 2 Cable Clamp Press ln If the hardware package is missing any items or is not found additional packages are available from Boston Acoustics Placement Since the speaker installation is permanent and the furniture placement may not be the user should first determine the best long term location one that will accommodate future relocation of the furniture in the room while still allowing for an unobstructed sound path from the speakers to the listening area Within reason wherever the speakers look right is where they ll sound right For best results place the speakers 6 to 10 feet 1 8 3 3m apart so they form a triangle with the main listening area Try to keep the speakers at least 12 to 18 inches 30 45cm from the nearest reflective surface side walls or ceiling When used near a televi sion the speakers should be mounted a minimum of 6 inches 150mm from the TV to avoid interference with the picture As a final check on the suitability of the mounting location its a good idea to temporarily place a pair of small box speak ers if available at the mounting locations chosen for the system This will give the listener a
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