Mackie Thump12 - Advanced Rear Panel Controls; Thru Output Connector; Level Knob and OL LED

Thump12 • Thump15 Powered Loudspeakers
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Thump12 • Thump15 Powered Loudspeakers
Thump12 / Thump15 Loudspeakers: Rear Panel Features continued...
Toconnectabalancedlinetothisinput,usea
1/4"Tip-Ring-Sleeve(TRS)plug.“TRS”standsfor
Tip-Ring-Sleeve,thethreeconnectionpoints
availableonastereo1/4"orbalancedphonejack
orplug.TRSjacksandplugsareusedforbalanced
signalsandstereoheadphonesandarewiredasfollows
accordingtostandardsspeciedbytheAES(Audio
EngineeringSociety):
Balanced 1/4" TRS Connector
Sleeve–Shield(ground)
Tip–Positive(+orhot)
Ring–Negative(–orcold)
Toconnectanunbalancedlinetothisinput,usea
1/4"mono(TS)phoneplug,wiredasfollowsaccording
tostandardsspeciedbytheAES(AudioEngineering
Society):
Unbalanced 1/4" TS Connector
Sleeve–Shield(ground)
Tip–Positive(+orhot)
Formoreinformationontheseconnectors,see
AppendixBonpage14.
SLEEVE
TIP
SLEEVE
TIP
RING
RING
TIP
SLEEVERING
Balanced 1/4" TRS Connector
SLEEVE
TIP
TIP
SLEEVE
TIP
SLEEVE
Unbalanced 1/4" TS Connector
5. Thru Output
ThisisamaleXLR-typeconnectorthatproduces
exactlythesamesignalthatisconnectedtotheinput
jack.Useittodaisy-chainseveralThumploudspeakers
togetheroffthesamesignalsource(s).
Theyarewiredasfollows,accordingtostandards
speciedbytheAES(AudioEngineeringSociety):
Balanced XLR Output Connector
Pin1–Shield(ground)
Pin2–Positive(+orhot)
Pin3–Negative(–orcold)
Seepage7tolearnmoreaboutdaisy-chainingThump
loudspeakers.
Formoreinformationontheseconnectors,see
AppendixBonpage14.
6. Level Knob / OL LED
Thelevelknobadjuststheoverallsignallevelatthe
inputtothebuilt-inpowerampliers.ItrangesfromOff
(–
)toMAX(maximumgain),withunitygainatthe
centerposition(12o’clock).
•Thumploudspeakersaredesignedtooperatewitha
+4dBusignalwhenthelevelknobisattheU(center)
position.
•Thumploudspeakersmayacceptuptoa+20dBu
signalbyturningdownthelevelknobaccordingly. 
Turningthelevelknobpastunitywillprovideenough
gaintoconnectamicrophonedirectly.
NEVERconnecttheoutputofanamplier
directlytotheinputoftheloudspeaker.
Thiscoulddamagetheinputcircuitry
oftheactiveloudspeaker.
TheaccompanyingOL(overload)indicator
illuminatesredwhentheamplierintheThump
loudspeaker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loudspeaker.
2
1
SHIELD
COLD
HOT
3
SHIELD
COLD
HOT
3
2
1
Balanced XLR Output Connector
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