Toa M-243 User manual
OPERATING INSTRUCTIONS
STEREO MIXER M-243
Thank you for purchasing TOA’s Stereo Mixer.
Please carefully follow the instructions in this manual to ensure long, trouble-free use of your equipment.
TABLE OF CONTENTS
1. IMPORTANT SAFETY INSTRUCTIONS .... 2
2. SAFETY PRECAUTIONS ............................. 3
3. GENERAL DESCRIPTION ........................... 4
4. FEATURES ................................................... 4
5. NOMENCLATURE AND FUNCTIONS ......... 5
Front ............................................................... 5
Rear ............................................................... 6
6. INTERNAL SWITCH SETTINGS ................. 6
7. BLOCK AND LEVEL DIAGRAMS ................ 7
8. DIMENSIONAL DIAGRAM .......................... 7
9. SPECIFICATIONS ........................................ 8
Accessories ................................................... 8
2
• Lirecesinstructions.
• Conserver ces instructions pour référence
ultérieure.
• Respectertouslesavertissements.
• Suivretouteslesinstructions.
• Nepasutilisercetappareilàproximitéd'eau.
• Nettoyeruniquementàl'aided'unchiffonsec.
• Nepasobstruerlesoricesdeventilation.Installer
conformémentauxinstructionsdufabricant.
• Nepasinstalleràproximitédesourcesdechaleur
tellesquedesradiateurs,desregistresthermiques,
des chaudières ou d'autres appareils (notamment
desamplicateurs)produisantdelachaleur.
• Ne pas contourner la fonction de sécurité de la che
polariséeoudemiseàlaterre.Unechepolariséeest
équipéededeuxbroches,dontl'uneestpluslargeque
l'autre.Unechedemiseàlaterreestéquipéededeux
brochesetd'unetroisièmepourlamiseàlaterre.Cette
dernière,lapluslarge,estprévueàdesnsdesécurité.
Si la che fournie ne peut être insérée dans la prise
électriquesouhaitée,consulterunélectricienpourfaire
remplacercettedernière.
• Protéger le cordon d'alimentation pour éviter qu'il
nesoitpiétinéoupincé,notammentauniveaudes
ches, des prises de courant ou de son point de
sortiedel'appareil.
• Utiliseruniquementlesaccessoiresspéciésparle
fabricant.
•
Utiliser uniquement avec le
chariot, support, trépied, la patte
demontage ou latablespéciés
par le fabricant ou vendus avec
l'appareil. En cas d'utilisation
d'un chariot, manipuler la
combinaison chariot/appareil
pour éviter les blessures dues à
unrenversement.
• Débrancher cet appareil pendant les orages ainsi
que lorsqu'il reste inutilisé pendant une période
prolongée.
• Lamaintenancedel'appareildoitêtreconéeàun
technicien après-vente qualié. Une maintenance
s'avère nécessaire si l'appareil est endommagé
(auniveauducordond'alimentationoudelache),
aétémouillé par unliquide,un objetesttombéà
l'intérieur,s'ilaétéexposéàlapluieoul'humidité,
s'ilnefonctionnepasnormalementous'ilesttombé.
• Readtheseinstructions.
• Keep these instructions.
• Heedallwarnings.
• Follow all instructions.
• Donotusethisapparatusnearwater.
• Cleanonlywithdrycloth.
• Do not block any ventilation openings. Install in
accordancewiththemanufacturer'sinstructions.
• Do not install near any heat sources such as
radiators,heatregisters,stoves,orotherapparatus
(includingamplifiers)thatproduceheat.
• Do not defeat the safety purpose of the polarized
or grounding-type plug. A polarized plug has two
bladeswithonewiderthantheother.Agrounding
type plug has two blades and a third grounding
prong. The wide blade or the third prong are
providedforyoursafety.Iftheprovidedplugdoes
not fit into your outlet, consult an electrician for
replacement of the obsolete outlet.
• Protect the power cord from being walked on
or pinched particularly at plugs, convenience
receptacles,andthepointwheretheyexitfromthe
apparatus.
• Onlyuseattachments/accessoriesspecifiedbythe
manufacturer.
• Use only with the cart, stand,
tripod,bracket,ortablespecified
bythemanufacturer,orsoldwith
the apparatus. When a cart is
used, use caution when moving
the cart/apparatus combination
toavoidinjuryfromtip-over.
• Unplug this apparatus during lightning storms or
whenunusedforlongperiodsoftime.
• Refer all servicing to qualified service personnel.
Servicingisrequiredwhentheapparatushasbeen
damagedinanyway,suchaspower-supplycordor
plugisdamaged,liquidhasbeenspilledorobjects
have fallen into the apparatus, the apparatus has
beenexposedtorainormoisture,doesnotoperate
normally,orhasbeendropped.
1. IMPORTANT SAFETY INSTRUCTIONS
INSTRUCTIONS ESSENTIELLES POUR LA SÉCURITÉ
3
2. SAFETY PRECAUTIONS
• Beforeinstallationoruse,besure to carefullyreadallthe instructionsinthissectionforcorrectandsafe
operation.
• Besuretofollowalltheprecautionaryinstructionsinthissection,whichcontainimportantwarningsand/or
cautionsregardingsafety.
• Afterreading,keepthismanualhandyforfuturereference.
Safety Symbol and Message Conventions
Safetysymbolsandmessagesdescribedbelowareusedinthismanualtopreventbodilyinjuryandproperty
damage which could result from mishandling. Before operating your product, read this manual rst and
understandthesafetysymbolsandmessagessoyouarethoroughlyawareofthepotentialsafetyhazards.
Indicatesapotentiallyhazardoussituationwhich,ifmishandled,could
resultindeathorseriouspersonalinjury.
Indicatesapotentiallyhazardoussituationwhich,ifmishandled,could
resultinmoderateorminorpersonalinjury,and/orpropertydamage.
WARNING
CAUTION
When Installing the Unit
Lors de l’installation de l’appareil
• Do not expose the unit to rain or an environment
whereitmaybesplashedbywaterorotherliquids,
asdoingsomayresultinreorelectricshock.
• Nepasexposerl’appareilàlapluieetleprotégerde
toutcontactavecdel’eauoud’autresliquidesan
d’éviterunincendieouuneélectrocution.
• Use the unit only with the voltage specied on
theunit.Usingavoltagehigherthanthatwhichis
speciedmayresultinreorelectricshock.
• Do not cut, kink, otherwise damage nor modify
thepowersupplycord.Inaddition,avoidusingthe
powercordincloseproximitytoheaters,andnever
placeheavyobjects--includingtheunititself--on
the power cord, as doing so may result in re or
electric shock.
• Since the unit is designed for in-door use, do not
installitoutdoors.Whenitgetswetwithrain,there
isadangerofelectricshock.
•Theapparatusshallbeconnectedtoamainssocket
outletwithaprotectiveearthingconnection.
• The socket-outlet shall be installed near the
equipmentandtheplugshallbeeasilyaccessible.
When the Unit is in Use
• Should the following irregularity be found during
use,immediately switch offthepower,disconnect
the power supply plug from the AC outlet and
contactyournearestTOAdealer.Makenofurther
attempttooperatetheunitinthisconditionasthis
maycausereorelectricshock.
· If you detect smoke or a strange smell coming
from the unit.
· Ifwateroranymetallicobjectgetsintotheunit
· Iftheunitfalls,ortheunitcasebreaks
· Ifthepowersupplycordisdamaged(exposureof
thecore,disconnection,etc.)
· Ifitismalfunctioning(notonesounds.)
• Topreventareorelectricshock,neveropennor
remove the unit case as there are high voltage
components inside the unit. Refer all servicing to
qualiedservicepersonnel.
• Do not place cups, bowls, or other containers of
liquidormetallicobjectsontopoftheunit.Ifthey
accidentallyspillintotheunit,thismaycauseare
or electric shock.
• Donotinsertnordropmetallicobjectsorammable
materialsintheventilationslotsoftheunit'scover,
asthismayresultinreorelectricshock.
CAUTION
When Installing the Unit
• Never plug in nor remove the power supply plug
with wet hands, as doing so may cause el
ectric
shock.
• Whenunpluggingthepowersupplycord,besureto
graspthepowersupplyplug;neverpullonthecord
AVERTISSEMENT
WARNING
4
itself. Operating the unit with a damaged power
supplycordmaycauseareorelectricshock.
• Whenmovingtheunit,besuretoremoveitspower
supply cord from the wall outlet. Moving the unit
with the power cord connected to the outlet may
causedamagetothepowercord,resultinginreor
electricshock.Whenremovingthepowercord,be
suretoholditsplugtopull.
• Avoidinstallingtheunitinhumidordustylocations,
inlocationsexposedtothedirectsunlight,nearthe
heaters, or in locations generating sooty smoke
or steam as doing otherwise may result in re or
electric shock.
• Besuretofollowtheinstructionsbelowwhenrack-
mountingtheunit.Failuretodosomaycauseare
orpersonalinjury.
· Installtheequipmentrackonastable,hardoor.
Fix it with anchor bolts or take other arrangements
topreventitfromfallingdown.
· Whenconnectingtheunit'spowercordtoanAC
outlet, use the AC outlet with current capacity
allowable to the unit.
· Thesuppliedrack-mountingscrewscanbeused
fortheTOAequipmentrackonly.Donotusethem
for other racks.
When the Unit is in Use
• If dust accumulates on the power supply plug or
in the wall AC outlet, a re may result. Clean it
periodically.Inaddition,insert thepluginthe wall
outlet securely.
• Switchoffthepower,andunplugthepowersupply
plug from theACoutlet for safety purposes when
cleaningorleavingtheunitunusedfor10daysor
more.Doingotherwisemaycauseareorelectric
shock.
L’éclairaccompagnéd’unsymbolereprésentantunepointedeècheàl’intérieurd’untriangleéquilatéral
avertitl’utilisateurdelaprésenced’une“tensiondangereuse”àl’intérieurdel’enceintedutéléviseur,
dontlamagnitudepeutêtresufsantepourconstituerunrisquedechocélectriquepourlespersonnes.
Le point d’exclamation à l’intérieur d’un triangle équilatéral avertit l’utilisateur de l’existence
d’instructionsd’utilisationetd’entretien(réparation)dansladocumentationfournieavecl’appareil.
3. GENERAL DESCRIPTION
TheM-243isastereomixerequippedwith2monauralinputs,4stereoinputs,1stereooutput,and2monaural
outputs.ItcanbemountedinanEIAcomponentrack(1Usize*).
*1Usize=44.5mmor1.75"(standardsize)
Thelightingashwitharrowheadsymbol,withinanequilateraltriangle,isintended
toalerttheusertothepresenceofuninsulated"dangerousvoltage"withintheproduct'senclosure
thatmaybeofsufcientmagnitudetoconstituteariskofelectricshocktopersons.
Theexclamationpointwithinanequilateraltriangleisintendedtoalerttheuser tothe presence
ofimportantoperationandmaintenance(servicing)instructionintheliteratureaccompanyingthe
appliance.
5
4 5 6 7
1
28 9
10
Inside of the
protective cover
3
5. NOMENCLATURE AND FUNCTIONS
[Front]
1. Power switch
Powerisswitchedonandoffwitheachdepression
of this switch.
2. Power indicator
LightswhenthepowerswitchissettoON.
3. Assignment keys [ST, 1, 2]
Select one of the following output destinations
to which the post-fader input signals are routed.
Signalsareoutputwhenpressed.
ST: Stereo output
1: MONO1output
2: MONO2output
4. Protective cover
Used to protect the setting position of the
assignmentkeys(3)fromaccidentaloperation.
Itcanbeusedasawritingplate.
5. Peak indicator
Lightswhentheoutputsignalreaches3dBbelow
clipping.Besuretoadjusteachinputlevelsothat
thePeakindicatordoesnotlightcontinuously.
6. Equalizer controls [EQ: LOW & HIGH]
Adjuststereooutputsignaltone.
LOW: Lowfrequencyadjustment(20Hz,±15
dBshelving)
HIGH:Highfrequencyadjustment(20kHz,
±15dBshelving)
7. Stereo output level control
Adjustsstereooutputlevel.
8. Input level controls [1 – 6]
(1 – 2: Monaural input, 3 – 6: Stereo input)
Adjusttheinputlevelofeachchannel.
9. Mute key
Activatesmutingwhenpressed.(Indicatorlights.)
[Muting function]
This function works only for the stereo output
channels. Attenuates the signals applied to
Channels3through6bydetectingsignalsapplied
toChannel1or2.(Thisfunctiondoesnotworkfor
themonauraloutputsignal.)
10. Monaural output level controls
Adjustmonauraloutputlevel.
4. FEATURES
• 2monauralinputs,4stereoinputs,1stereooutput,and2monauraloutputs.Assignableeachinputsignalto
3outputchannelsindividually.
• Sub-inputterminalsforstereooutputchannelandeachof2monauraloutputchannels.
• Microphone input or lineinputformonaural inputselectabledependingon thesignallevel.Built-inlimiter
circuitryeliminatesdistortionunderexcessiveinputlevels.High-passlteraswellasPAD(onlyforMICinput)
inthemonaurallineavailablebytheinternalswitchsettings.
• Peakindicatortodetectclipping.
• An"AutomaticMuting"circuitautomaticallymutesthestereooutputsignalbydetectingthemonauralinput
signal.(ON/OFFswitchable)
• Arecordingoutputandequalizer(highandlowfrequencies)forthestereooutputchannel.
• 2channelmonauraloutputsusableassumoutputsforthestereooutputchannelindividuallybytheinternal
switch setting.
• Protectivecoverforprotectingthesettingpositionofeachinputusableasawritingplate.
• Knobs supplied in different colors and size easily replaceable depending on the intended use, improving
operability of the unit.
Table of contents
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