Mackie SRM450v3 - Gain Adjustment; Rear Panel Connections Explained; RCA Inputs; THRU Output Connector

SRM350v3 and SRM450v3 Powered Loudspeakers
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SRM350v3 and SRM450v3 Powered Loudspeakers
SRM350v3/SRM450v3 Loudspeaker: Rear Panel Features continued...
Balanced 1/4" TRS Connector
Sleeve–Shield(ground)
Tip–Positive(+orhot)
Ring–Negative(–orcold)
Toconnectunbalancedlinestotheseinputs,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17.
4. Gain Knobs
Thegainknobsadjusttheinputsensitivityofthe
mic,lineand/orRCAinputs.Thisallowssignalsfrom
theoutsideworldtobeadjustedtorunthrougheach
channelatoptimalinternaloperatinglevels.
Thereis–
dBofgainwiththeknobfullydown
(off),rampingupto50dBofgainfullyup(max).
TheaccompanyingLEDwillilluminategreenwhen
thechannel’sinputsignalispresent,indicatingsignal.
Itwillremainlitsolongasthereissignalabove
–20dBupresentinthatchannel.
TheaccompanyingLEDwillilluminateredwhenthe
amplierintheSRMv3loudspeakerisneartheclipping
point.ItisokayifthisLEDblinksoccasionally,because
thismeansthatthetransientpeaksarejustreaching
themaximumoutputoftheampliersandyouare
gettingthemostoutofyourloudspeaker.
Ifconnectingmixeroutputstoloudspeaker
inputs,setthegainknobto10:00[“Line”]
foroptimalsoundandperformance.
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. RCA Inputs [Channel 2 Only]
ThestereounbalancedRCAinputsallowyouto 
playaCDplayer,iPod
®
,orotherline-levelsource. 
TheRCAjacksacceptanunbalancedsignalusing
standardhi-[RCA]hookupcables.
Theyarewiredasfollows,accordingtostandards
speciedbytheAES(AudioEngineeringSociety):
Unbalanced RCA Connector
Sleeve–Shield(ground)
Tip–Positive(+orhot)
Formoreinformationontheseconnectors,see
AppendixBonpage17.
6. Thru Output
ThisisamaleXLR-typeconnectorthatproduces
exactlythesamesignalthatisconnectedtothe 
maininputjackoramixofchannels1and2.Useitto
daisy-chainseveralSRM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)
TIPSLEEVETIPSLEEVE
Unbalanced RCA Connector
2
1
SHIELD
COLD
HOT
3
SHIELD
COLD
HOT
3
2
1
Balanced XLR Output Connector
ON
OFF
POWER
SIG/OL
SIG/OL
CH 1
MIX
U
MAXOFF
LINE MIC
U
MAXOFF
LINE MIC
PA
DJ
MON
SOLO
1
ON
HOLD TO
CLEAR
2
3
4
LIMIT
ON
LED
OFF
R L
GAIN
GAIN
SPEAKER
MODE
FEEDBACK
DESTROYER
MAIN
3 6
7
5
4