Mackie 18S Headphones User Manual


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Owner’s Manual
9
Owner’s Manual
Thump18S Subwoofer: Rear Panel Features
1. Power Connection
Thisisastandard3-prongIECpowerconnector.
Connectthedetachablepowercord(includedin
thepackagingwiththesubwoofer)tothepower
receptacle,andplugtheotherendofthepower 
cordintoanACoutlet.
MakesurethattheACpowerismatchedto
theACpowerindicatedontherearpanel
(belowtheIECreceptacle).
Disconnectingtheplug’sgroundpinis
dangerous.Don’tdoit!
2. Power Switch
Pressthetopofthisrockerswitchinwardstoturnon
thesubwoofer.Pressthebottomofthisrockerswitch
inwardstoturnoffthesubwoofer.
Asageneralguide,themixer(orothersignal
source)shouldbeturnedonrst,Thump18S
subwoofersnext,andloudspeakerslast. 
Assuch,theloudspeakersshouldalsobeturnedoffrst,
followedbythesubwoofers,thenthemixer.Thiswill
reducethepossibilityofanyturn-onorturn-offthumps
andothernoisesgeneratedbyanyupstreamequipment
fromcomingoutofthespeakers.
3. Power LED
Whenthepowerswitchisturnedon–andthepower
cordisconnectedtoanactiveACmainssupply–this
LEDilluminatesgreentoindicatethatthesubwooferis
indeedreallyon.ThecoolgreenLEDonthefrontofthe
subwooferworksthesameway.
4. XLR Inputs
BalancedXLRfemaleconnectorsareprovidedforthe
leftandrightinputs.Connectthefull-rangeline-level
signalfromthemixer(orothersignalsource)tothese
inputjacks.
Ifyouareconnectingasinglesubwooferoutput,or
LFE(low-frequencyeffects)outputtothesubwoofer,
youmayuseeithertheAorBinputconnector.
NEVERconnecttheoutputofanamplier
directlytotheinputofthesubwoofer. 
Thiscoulddamagetheinputcircuitryofthe
activesubwoofer.
Theyarewiredasfollows,accordingtostandards
speciedbytheAES(AudioEngineeringSociety):
Balanced XLR Input Connector
Pin1–Shield(ground)
Pin2–Positive(+orhot)
Pin3–Negative(–orcold)
Formoreinformationontheseconnectors,see
AppendixBonpage15.
2
3
1
SHIELD
COLD
HOT
SHIELD
COLD
HOT
3
2
1
Balanced XLR Input Connector
2
4
3
5
8
6
7
1
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