Rane Ac 22b Instruction and safety manual

ANE OPERATING/ SERVICE

MANUAL ME 60

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EQUALIZER

QUICK START

Okay,know-ilall.So

you

don'tn€edtoreadthemanual-Welldo

your

motherafavofandjustreadthissectionand

you

don'thavelorcadanything€lse.Ev€r.

Ilook-upisintuitive.Justfollowth€silkscrecnedinstructions

ontherearoftheunit.All rhreeInputs

arewired

inparallel

(lhey

do,ol s m);andallthreeOutprtsarewi.cd;n

parallel.

Useanyors Inputandanyorall

Outputs.Polarityconvention

pcr

IAC/ANSI/AES

standardsolpin 2positive,

3negativeand

pinI ground.

TheME60doesnotinverrrhesignal.

tJscthe

ground

lift(SICCND)switchon

therear

tohelpeliminatestubbornhum

problems.

SetrhcLO CUT andHI CU'l controlsasncccssary

torestrict

bandwidth.Fullfrequencyrcsponser€sults

from

position-

ingthemallrhewaytotlrebollon].

Anyoncthmilirrwilhothcr

graphic

cqualizercfinds

theME60justasfamiliar.Settingcurvesisaseasy

itis

all

Rancgraphics

thankstoorr innovalive

constant

Qcircuitry.lfyou feel

you

wantmoreinformation

onsetlingup

your

curves,

please

seetheback

page.

There.nowwasthatsobad?

SYSTEMCONNECTION

WhcDfiBl connectingtheMtt 60

toothe.

componenls,

/cdre/rc POW[R s|/itrhallMtit tllewt]Iast. IhisgivesyouI

chancc1omakcnristakcsrndconcclthcnrwilhoutdanragingyour

fragilespeakers,earsandnervcs.

lNPUlS.AllthrccInpursarcwircdinplrallel

and

are

aclivelybalanced,excepttheunbalanc€dRCA

phono.

Eachworks

cquallywell.ChooscsLricllyfromarequircdhardwarcponrtof view,

therewill beno

performance

tradc-olfs.Thcwiring

convcntionadhcrcstoAmcrican.Brilishandlfltcrnaltunal

stlndardsofpin 2ortipbeinghot,

3orringbeingrerurn.and

piDI orslccvebeingsignal

ground.

Unbalancedoperalionirvolvesusingonly

2ortipassignal,and

I orslee!e

ground.

Ilisnolnecessarytoshortanyinputsto

groLrnd

itdoesn'thun.it'sjustnotnecessary.Usepinl,ortheshell.fo.

shield

ground.

OUTPUTS.IheOutpurs

mimictheInputs.Balanced

outputrequiresusing

2ortip,and

ptu

3orringforthcsignal.lt

docsnolrcquire

pinI orsignal

ground.

Thcsisnalcxistsdifferentially

betweenthetwobalancedleads;

ground

isnotinvolved.

for hum-iieesystems

ground

isusedonlyforshielding.

OXPANDING.Expardingand/ordaisychaininglheInputsandOulpulsnormallyusesthe

jacks.

Three

parallel

Input

connectorsallowsdrivingasecondsignal

processor

oramplifierwithoutspccialcabling.

SICNALLEVELS.S'gnalievclsliom

-l0dBV

1()

+4dBu

arc

considerednormalandwiihinrange

(at

least20dBof

headroonrexistsabovcthcselcvcls).Donotdircctlycotrncct

microphonesintotheME60.Thesercquireamicproamp.

FRONTPANEL DESCRIPTION

powDR swITcH & INDICATOR.Electrically

speaking

(as

oppos€d

topoliticallyorfinancially)

thisconlrols

the

power

torh€ME60

(as

opposed

tothe

people).

The

yellow

LEDIightsanytime

thisswitch

isclosedand

power

has,

infact,actuallv

flowed

into

theME 60.

2.FTLTER

LEVEL CONTROLS.

Thesestidecontrols

setrhe

individual

levelsforeach

oftheconsianrQ

filters.

Th€irrange

+t2dB,

andthe

groundedcenter-derent

design

ensuresindividual

filters

areoffand

bypassed

when

positionedtotheircenters

3.LO CUT FILTER CONTROL.

Sets

th€comer

frequency

(-3dB

point)forthelowcutfilter

(high

past.Adjustable

ftom

10Hzto250H2.

4.HICUTFILTERcoNTRoL.S€tsthecornerfrequencyC3dBpoint)fofthehighcutfilter(lowpass)'Adjustabl€tiorn

3kHz

to40kHz.

5.CHANNELLEVELCONTRoL.Usedtosettheoveralld€siredgainthroughtheunit.Therangeis|romoffto+l2dBfor

balanced

us€,orfromOffto +6dB

forurbalanced

operation.

Unity

gain

isat

approximately

"6" (balanced)or

"7" (unbal-

anced).

Using

thehighest

setting

(withoutlighting

theOL indicator)

yields

thebest

signal-to-noise

performance

6.oVERLoADINDICAToR.ThisredoLLEDmonitorsa|lcriticalpointsforexcessivesignallevels'Itlightswhenever

1hese

tevelsexceed

3dBb€low

clipping.

occasional

flickering

isnormal;

however,

itshould

no.beallowed

tolights.eadily

7.ByPASS

SWTTCH

& TNDICATOR.

This

pushbuttonswirchactivates

the

"hard-wire"

bypassfunction.

when

€ngaged

(red

BYPASSLEDon),allthreepinsofth€inputconnectorsdirectlyconnecttothesamepinsontheoutputconnec.ors(hard-

wired).

Engaging

ihisswitch

converts

the

ME60

intoarelativelv

expensive

patchcord,but

onewith

pretlv

lights'

in+n$:ft:f,++,{++$=n:++fl:fi

+fi

+:H=fl

+=h:n++fr

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OPERATING INSTRUCTIONS

Bcfore altemptingany audioequalization

with theME 60,

it isimponant

10optimizeth€CHANNEL LtrVEL control

setting.Impropcr

ganr

distribulionisacommon

causeof

headroomloss

andincreasednoisein audiosystems.

The Ml.l60 providesyou with anoverall BYPASSswilch

andnrdicalo.

well asanOL (overload)

LED asusefultools

for optimiz;Dgthisgairr

serup.The BYPASS switchisuseful

formakirgquick

A'B comparisons,i.e.,conrparingequalizcd

(BYPASS out,LED ofi) versusunequalized

(BYPASS in,

LED on) sound.To do this ficely, without danger

ofsystem

danlage,rcquircsyousclthclcvclthrough

theME 60to

approximalclyunity. Irailurcto do socan

produce

alarming

'lhcgain.ange

ofthe ME 60isOfflo +6dB

forunbal-

ancedoperation,orOfTto

+l2dB forbalancedusc.ThcML 60

isalwaysunity

gain

inbypass,soifyou addorrcducegain

(bcyondEQmakc-up

gain)thc levcldiflc.ences

between

BYI'ASS switchbcmg in or out canbestartling.

Therefore

yourvanlloactthcCIIANNEL LEVEL contolsfor

equalin/

gcl

slarlcd,lnakethclbllowinginitialsctup

L CHANNEL AYPASSswitchcsdcprcsscd

(eqrals

bypassed

condilion

= rcdI-I]Don).

2.CH,{NNEL LEVEL controls

positioned

ai 7"fbrunbal-

anced,or' 6" ior

balanceduse.

3.Allslidecontrolsincenter-detent

positions

(0dB

boost/cut).

4.Applysignaltothesystern.

5.ChcckthatanOL indicatorisnoton.Ifan OL LEDison,

moveirsCHANNoL LEvEL controldown

just

enoughfbr

it 1ogoo t. Iroroptimunrnoise

pcrlbrn]ancc

alwaystakc:ls

muchgaiD

a!possiblcwithoulcoDtinuouslyIightirrg

theOL

light.

6. Rclcasclhc IIYI'ASS switchand

youarcrcady1o

staft

cqralizingtheslstcnr.

Sin(cr.ounrcc^nn(n., i.r .,nd

roncconroL,rinjare

two

ol themostcommonuseslbr equalization.hereareafew

ACOUSTICCOMPENSAI lON. Acousliccompcnsalion

iscoDtrollednicclywithadcviccsuchasthcME60.Thcbcst

wuy to'\ec whal roomacousticsaredoi,rglo your soundis

1olsc eithera realtime analyzeror anyofthe manyconlputer-

ized

measurcnrcnts)'sicmssuchaslimc delayspcctromciryor

othersimilar

deviccs.Thistcstcquipmcnllcts

)ouanalyzethe

responseoflheroomandthcsoundsystem:ndisthconly

accurale

nreanslvailabl. for seltiDgancqunlizcr

properly.

Itisaverygoodidearoalwalsuscaslillleequalizationas

possiblc.tl modesla ounts

(try to notusemorethan6-8dB)

ofcqualization

donotsolvethe

pfoblem.

thenothernreans

UsetheBYPASSswitchtoconpare€qualizedwith

unequaljz€dsound.Compare

thetwoand

settheequalizeras

besl

youcanusing

controllednoisesources,

sweepsignals.or

sourccmale.ial

drat

you

areveryfanliliar

wirh.Tryioavoid

addingtoo

nuch lowend.Thisisanarea

whereequalizersarc

ltequcntlyabused,

causinglotsofunDecessary

stresson

amplificrsand

speakers.Thisis

padicularly

imporrantwhen

using

anysoftofventedenclosrclowliequencydrivers.Too

much

levelappliedtoawoofer

belolvthecutotifrcqucncyof

itsenclosurecarscsverylarge

speakerexcursions

nndvery

shon1iIc.

TONECONTOURINC

withtheME

accomplished

nainlybycar.Thisyou

knowhowtodo.Be

carefulrbough.

nol1oinlroduceloo

muchboositolhcupper

bassarea

(ofthe

sub-bassarca

thelastwarning).Bcawarc

$at theME60

isupable

ofboosringsignahuptol2dB

timesaslargeli

alevelatwhich

great

carcshould

betakenloprcvcnt

scismic

IMPORTANTNOTE

CHASSISGROUNDING

Raneprofessional

equalizersaresupplicdwitbarcar

rnountedground

liftswitch.Theunitisshippcd!vnhdris

switchinthe

"grounded"

position,

iyingcircuit

ground

tochassis

ground.

Ifalterhooking

your

systemit

exhibitsexcessivehun o.brzzing,lhere

isanincompat-

ibilityinthe

grounding

configuration

betweerunits

somewherc.Yourmn.ioF\hould

\ou

Jc.ep'it.i. ro

discoverhow

yourparticrlar

system

wantstobe

grounded.

Hercare

somethingstotry:

l. T.ycombinationsofliftinggrounds

onunitsrhat

aresuppliedwith

ground

1iliswitches

orlinks.

2.Ifyour equipmenlisinarack.v€rify

thatall

chass'saretiedtoagood

earth

ground,

eilhcrthrough

thelinecord

groundingpin

ortherackscres$toanolhcr

L Units

with

oulboard

power

suppliesdoNOT

ground

the

chassisthroughthe'rI'ne€ords.Makesure

theseunitsar€

grounded

eithertoanolherchassiswhich

isearth

grounded,

ordirectlytothe

grounding

screwon

anACoutletcoverbyineansofauire connecledioa

screwon

thechassiswithastar

washer

toguarantee

OR:rneCorDoration

1080247thAvenueWcst.MukiltcoWA98275-5098TEL(206)

355-6000FAX(206)3,17-7757-

@ fr nrcLji Lhct S.\ unRcclccdPrp$ All terturcs& spcciticalionssubjcctlo changc+irho

nolice 520-41I

lLJNt5

RISK OF ELECTRIC SHOCK

DO NOT OPEN

CAUTION

To reduce the risk of electrical shock, do not open the unit. No user

serviceable parts inside. Refer servicing to qualied service personnel.

e symbols shown below are internationally accepted symbols that warn

of potential hazards with electrical products.

is symbol indicates that a dangerous voltage

constituting a risk of electric shock is present within

this unit.

is symbol indicates that there are important

operating and maintenance instructions in the

literature accompanying this unit.

WARNING

IMPORTANT SAFETY INSTRUCTIONS

1. Read these instructions.

2. Keep these instructions.

3. Heed all warnings.

4. Follow all instructions.

5. Do not use this apparatus near water.

6. Clean only with a dry cloth.

7. Do not block any ventilation openings. Install in accordance with manufacturer’s instructions.

8. Do not install near any heat sources such as radiators, registers, stoves, or other apparatus (including ampliers) that produce heat.

9. Do not defeat the safety purpose of the polarized or grounding-type plug. A polarized plug has two blades with one wider than the other. A ground-

ing-type plug has two blades and a third grounding prong. e wide blade or third prong is provided for your safety. If the provided plug does not

t into your outlet, consult an electrician for replacement of the obsolete outlet.

10. Protect the power cord and plug from being walked on or pinched particularly at plugs, convenience receptacles, and the point where it exits from

the apparatus.

11. Only use attachments and accessories specied by Rane.

12. Use only with the cart, stand, tripod, bracket, or table specied by the manufacturer, or sold with the apparatus. When a cart is used, use caution

when moving the cart/apparatus combination to avoid injury from tip-over.

13. Unplug this apparatus during lightning storms or when unused for long periods of time.

14. Refer all servicing to qualied service personnel. Servicing is required when the apparatus has been damaged in any way, such as power supply

cord or plug is damaged, liquid has been spilled or objects have fallen into the apparatus, the apparatus has been exposed to rain or moisture, does

not operate normally, or has been dropped.

15. e plug on the power cord is the AC mains disconnect device and must remain readily operable. To completely disconnect this apparatus from

the AC mains, disconnect the power supply cord plug from the AC receptacle.

16. is apparatus shall be connected to a mains socket outlet with a protective earthing connection.

17. When permanently connected, an all-pole mains switch with a contact separation of at least 3 mm in each pole shall be incorporated in the electri-

cal installation of the building.

18. If rackmounting, provide adequate ventilation. Equipment may be located above or below this apparatus, but some equipment (like large power

ampliers) may cause an unacceptable amount of hum or may generate too much heat and degrade the performance of this apparatus.

19. is apparatus may be installed in an industry standard equipment rack. Use screws through all mounting holes to provide the best support.

WARNING: To reduce the risk of re or electric shock, do not expose this apparatus to rain or moisture. Apparatus shall not be exposed to dripping

or splashing and no objects lled with liquids, such as vases, shall be placed on the apparatus.

NOTE: is equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. ese

limits are designed to provide reasonable protection against harmful interference in a residential installation. is equipment generates, uses and can

radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communica-

tions. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to