Mackie 18S Headphones User Manual


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Owner’s Manual
11
Owner’s Manual
Thump18S Subwoofer: Rear Panel Features continued...
7. Level Knob / OL LED
Thelevelknobadjuststheinputsensitivityofthe
inputs.Thisallowssignalsfromtheoutsideworldto
beadjustedtorunthrougheachchannelatoptimal
internaloperatinglevels.Thereis–6dBofgainwiththe
knobfullydown(off),rampingupto6dBofgainfully
up(max).Thelevelcontrolhasnoeffectonthehigh
passoutputsorfullrangeoutputs.
TheaccompanyingOL(overload)indicator
illuminatesredwhentheamplierintheThump18S
isneartheclippingpoint.ItisOKiftheOLLEDblinks
occasionally,becausethismeansthatthetransient
peaksarejustreachingthemaximumoutputof
theamplierandyouaregettingthemostoutof
thesubwoofer.
However,iftheOLLEDisblinkingfrequently
orcontinuously,turndownthelevelcontrolon
theThump18Sorturndownthesignalatitssource
(e.g.,themixingconsole)untiltheOLLEDblinks
occasionallyornotatall.
8. Normal/Invert Switch [Polarity]
Thisswitchreversesthepolarityofthesignalgoing
intothesubwooferamplierby180˚.Ithasnoeffecton
thesignalattheoutputs.
Thereisnorightorwrongsettingforthisswitch.
Listentotheoverallblendofthesubwooferwith
therestofthesystemandselecttheswitchposition
thatgivesyouthebestsoundforyouraudience.
Infact,yoursystemmayvarywhenpositioned
differentlyandinalternatevenues.Don’tbeafraid
toexperimentwiththepositionofthepolarityswitch.
Seepage12formoreinformation.
Questionnaire
Thereisquiteabitofblankspaceleftover,sowhynot
llitwithaquestionnaire?
•BeatlesorStones?
•StarWarsorStarTrek?
•Chocolateorvanilla?
•BatmanorSuperman?
•Dogsorcats?
•Beerorwhiskey?
•Pizzaorcheeseburger?
•Footballorbaseball?
•PlaystationorXbox?
•JimmyPageorJimiHendrix?
•FamilyGuyorSouthPark?
•Coffeeortea?
•Whatisyourfavoritecolor?
•Whatistheair-speedvelocityofanunladen
swallow?
Final Thoughts
ThefollowingpagesdiscussThump18Splacement,an
in-depthlookatpolarity,protectioncircuitry,technical
informationandmuchmore.Checkitout!
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