Yamaha NS-B901 Owner's manual

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iEn

English

Read this before using the speaker.

• Toassurethenestperformance,pleasereadthis

manualcarefully.Keepitinasafeplaceforfuture

reference.

• Installthespeakerinacool,dry,cleanplace–away

fromwindows,heatsources,sourcesofexcessive

vibration,dust,moistureandcold.Avoidsourcesof

humming(transformers,motors).Topreventreor

electricalshock,donotexposethespeakertorainor

water.

• Topreventtheenclosurefromwarpingordiscoloring,

donotplacethespeakerwhereitwillbeexposedto

directsunlightorexcessivehumidity.

• Donotplacethefollowingobjectsonthespeaker:

Glass,china,etc.

Ifglassetc.fallsbyvibrationsandbreaks,itmay

causepersonalinjury.

Aburningcandleetc.

Ifthecandlefallsbyvibrations,itmaycausereand

personalinjury.

Avesselwithwaterinit

Ifthevesselfallsbyvibrationsandwaterspills,it

maycausedamagetothespeaker,and/oryoumay

getanelectricshock.

• Donotplacethespeakerwhereforeignobjectssuchas

waterdripsmightfall.Itmightcauseare,damageto

thespeaker,and/orpersonalinjury.

• Donotplacethespeakerwhereitisliabletobe

knockedoverorstruckbyfallingobjects.Stable

placementwillalsoensurebettersoundperformance.

PRECAUTIONS

• Placingthespeakeronthesameshelforrackasthe

turntablecanresultinfeedback.

• Neverputahandoraforeignobjectintotheport

locatedontherearofthespeakerasthismightcause

personalinjuryand/ordamagetothespeaker.

• Whenmovingthespeaker,donotholdtheportasit

mightcausepersonalinjuryand/ordamagetothe

speaker.

• Anytimeyounotedistortion,reducethevolumecontrol

onyourampliertoalowersetting.Neverallowyour

ampliertobedriveninto“clipping”.Otherwisethe

speakermaybedamaged.

• Whenusinganamplierwitharatedoutputpower

higherthanthenominalinputpowerofthespeaker,

careshouldbetakennevertoexceedthespeaker’s

maximuminput.

• Donotattempttocleanthespeakerwithchemical

solventsasthismightdamagethenish.Useaclean,

drycloth.

• Donotattempttomodifyorxthespeaker.Contact

qualiedYamahaservicepersonnelwhenanyserviceis

needed.Thecabinetshouldneverbeopenedforany

reasons.

• Secureplacementorinstallationistheowner’s

responsibility.

Yamahashallnotbeliableforanyaccidentcaused

byimproperplacementorinstallationofthespeaker.

Takingcareofthespeaker

Tomaintainthespotlessglossysurfaceofthe

polishednish,wipeitwithasoft,drycloth.To

avoiddamagetothenish,donotapplychemical

solvents,suchasalcohol,benzine,thinner,

insecticide,etc.Also,donotuseadampcloth,or

anytypeofcloththatcontainschemicalsolvents,or

placeaplasticorvinylsheetontopofthespeaker.

Otherwise,thenishmaypeel,thecolormayfade,

orthesheetmaysticktothesurface.

1En

WARNING

• Thisspeakerweighs5.9kg(13lbs.).Donotmount

itonthinplywoodorawallwithsoftsurface

material.Ifmounted,thescrewsmaycomeoutof

theimsysurfaceandthespeakermayfall.This

damagesthespeakerorcausespersonalinjury.

• Donotinstallthespeakertoawallwithnails,

adhesives,oranyotherunstablehardware.Long-

termuseandvibrationsmaycauseittofall.

• Becarefulnottopinchthespeakercablesbetween

thespeakerandthespeakerbracketorspeaker

stand.

• Toavoidaccidentsresultingfromtrippingover

loosespeakercable,xittothewall.

60mm

Whenhangingonawall

Youcanhangthespeakeronawallusingacommer-

ciallyavailablebracketandscrews.

Pleaserefertotheowner’smanualthatcamewithyour

speakerbracket.

Screwholes

Diameter:6mm(1/4”)

Holedepth:15mm(5/8”)

Thegrilleisdetachedfromthespeakerandpackedsepa-

rately.Becarefulnottoloseit.

Placethespeakersonasturdy,vibration-freesurface,ona

well-builtstand.

■ Usingas2chstereospeakers

Betterstereoimageswillbeobtainedwhenthespeakers

areslightlyangledintowardsthelisteners.

■ Usingasfrontspeakersinamultichannel

system

PositionthespeakersonbothsidesoftheTV.Theposition-

ingofspeakersisimportant,becauseitcontrolsthewhole

soundqualityofamultichannelsystem.Setupthespeak-

ersonthebasisofyourlisteningpositionbyfollowingthe

owner’smanualsuppliedwithyouramplier.

■ Usingaspresenceorsurroundspeakers

Placethespeakersonashelfetc.Determinethebest

positionbyfollowingtheowner’smanualsuppliedwithyour

amplier.

Note

PlacingthespeakerstooclosetoaCRT-typeTV

mayimpairthepicturecolororcauseabuzzing

noise.Inthiscase,movethespeakersatleast20cm

(8”)awayfromtheTV.ThisisnotanissuewithLCD

andplasmaTVs.

PLACINGTHESPEAKERS

NS-B901

Surround

Safetywirebracket

Usetoattachasafetywire

aftermountingthespeaker

bracket.

Subwoofer

Center

NS-B901

Presence

NS-B901

Front

(2-3/8”)

2En

English

CONNECTIONTOYOURAMPLIFIER

Beforemakingconnection,makesurethattheamplierisswitchedoff.

■ CONNECTIONS

Youneedacommerciallyavailablespeakercable.

y

Thesizeand/ormaterialofaspeakercableaffectsonthe

soundquality.Therefore,werecommendyoutopurchase

ahigh-qualityspeakercabletoexerttheperformanceof

thisunit.

Notes

• Connectthe(+)terminalsontheamplierandthe

speakersusingonesideofthecable.Connectthe

(–)terminalsonbothcomponentsusingtheother

sideofthecable.

• Connectonespeakertotheleft(L)terminalsof

youramplier,andanotherspeakertotheright(R)

terminals,makingsurenottoreversethepolarity

(+,–).Ifonespeakerisconnectedwithreversed

polarity,thesoundwillbeunnaturalandlackbass.

• Whenusinganamplierwitharatedoutput

powerhigherthanthenominalinputpowerofthe

speaker,careshouldbetakennevertoexceedthe

speaker’smaximuminput.

• Thespeakermaybedamagedifcertainsounds

arecontinuouslyoutputathighvolumelevel.

Forexample,ifsinewavesfromatestdisc,bass

soundsfromelectronicinstruments,etc.,are

continuouslyoutput,orwhenthestylusofa

turntabletouchesthesurfaceofadisc,reducethe

volumeleveltopreventthespeakerfrombeing

damaged.

• Pleaserefertotheowner’smanualthatcamewith

youramplierorreceiver.

Howtoconnect:

1 Loosentheknob.

2 Remove15mm(5/8”)ofinsulationfromeachendof

thecables,andtwisttheexposedconductorstogether

neatlyandtightly,asshownbelow.

15 mm

(5/8")

3 Insertthebarewireintothehole.

4 Tightentheknobandsecurethecable.

5 Testthermnessoftheconnectionbypullinglightlyon

thecableattheterminal.

Notes

• Donotletthebarespeakerwirestoucheachother

asthiscoulddamagethespeakerortheamplier,

orbothofthem.

• Donotinserttheinsulationcoatingintothehole.

Thesoundmaynotbeproduced.

1

2

Bananaplug

Whenusingabananaplug

1 Tightentheterminalknob.

2 Simplyinsertthebananaplugintotheterminal.

SPEAKERS

A

B

L

R

+

–

Amplier

NS-B901

Loosen

Black(–)

Red(+)

NS-B901

Speaker

terminalsof

theamplier

(R) (L)

Tighten

Insulationcoating

Barewire

3En

SPECIFICATIONS

Type.................................2-waybassreexspeakersystem

 nonmagneticshieldingtype

Driver................................................13cm(5”)conewoofer



3cm(1”)aluminumdometweeter

Impedance...................................................................... 6Ω

FrequencyResponse................... 52Hzto50kHz(–10dB)



to100kHz(–30dB)

NominalInputPower.....................................................30W

MaximumInputPower.................................................120W

Sensitivity...................................................... 87dB/2.83V/m

CrossoverFrequency...................................................4kHz

Dimensions(WxHxD)........................220x349x237mm

 (8-5/8”x13-3/4”x9-3/8”)

Weight...........................................................5.9kg(13lbs.)

• Specicationsaresubjecttochangewithoutnoticedue

toproductimprovements.

• Careshouldbetakennottoexceedtheinputpower

valuesnotedabove.

ATTACHINGTHEGRILLE

Thespeakerandthegrillearepackedseparately.

Toattachthegrille,lineupthefoursalients(magnet)onthe

reversesideofthegrillewiththefourcorrespondingpegs.

Notes

• When the grilleisnotattached,takecarenotto

touchthespeakerunitswithyourhandsorto

exertexcessiveforcewithtools.

• Therearemagnetsonthereversesideofthegrille.

Donotplacethegrilleclosetoobjectsthatmight

beaffectedbymagnets,suchasTVs,clocks,

magneticcards,diskettesetc.whenyoudon’tuse

it.

English

Information for Users on Collection and Disposal of Old Equipment

This symbol on the products, packaging, and/or accompanying documents means that used electrical and

electronic products should not be mixed with general household waste.

For proper treatment, recovery and recycling of old products, please take them to applicable collection points,

in accordance with your national legislation and the Directives 2002/96/EC.

By disposing of these products correctly, you will help to save valuable resources and prevent any potential

negative effects on human health and the environment which could otherwise arise from inappropriate waste

handling.

For more information about collection and recycling of old products, please contact your local municipality,

your waste disposal service or the point of sale where you purchased the items.

[Information on Disposal in other Countries outside the European Union]

This symbol is only valid in the European Union. If you wish to discard these items, please contact your local

authorities or dealer and ask for the correct method of disposal.

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Yamaha NS-B901 Owner's manual

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