Mackie SRM550 - Placement

SRM550 • SRM650 • SRM750 Powered Loudspeakers
14
SRM550 • SRM650 • SRM750 Powered Loudspeakers
Placement
WARNING:Installationshouldonlybedone
byanexperiencedtechnician.Improper
installationmayresultindamagetothe
equipment,injuryordeath.Makesurethatthe
loudspeakerisinstalledinastableandsecureway
inordertoavoidanyconditionsthatmaybedangerous
forpersonsorstructures.
Theseloudspeakersaredesignedtositonthe
oororstageasthemainPA,monitors[SRM550/
SRM650],orllspeakers[SRM750].Checktomake
surethatthesupportsurface(e.g.oor,etc.)hasthe
necessarymechanicalcharacteristicstosupportthe
weightoftheloudspeaker(s).
Theymayalsobepole-mountedviathebuilt-in
socketonthebottomofthecabinet.Besurethepole
iscapableofsupportingtheweightoftheloudspeaker.
Whenpole-mountingloudspeakers,besurethatthey
arestabilizedandsecuredfromfallingoverorbeing
accidentallypushedover.
TheSPM200isagreatoptionwhenusingan
SRMsubwoofer,asitallowsforgreaterextension
thanmostotherpolesavailablenorthoftheSouthPole.
PleasenotethatSRM750loudspeakers
shouldnotbepole-mountedviaSPM200.
Instead,itshouldbestackedontopofthe
subwoofer.Itishighlysuggestedthatstrapsareutilized.
Toreiterate,failuretofollowtheseprecautionsmay
resultindamagetotheequipment,personalinjury,
ordeath.
Theseloudspeakersmayalsobeownviaitsy
pointsasdetailedonpages16–17.Besuretoreadthe
PA-A2EyeboltInstallationInstructions,aswell.
TheseloudspeakersareNOTdesignedtoarray
horizontally.Ifyoufeelyoumustputtwospeakers
side-by-side,youshouldhaveagoodunderstanding
oftherelationshipbetweenthesplayangle(theangle
betweenthefacingsidesofthecabinets)andfrequency
cancellationeffectsbetweencabinets.
Whentwocabinetsarepositionedside-by-side
suchthattherear-angledfacesoftheenclosures
areparallel,thesplayanglewillbe90º.Thismatches
the90˚horizontalcoveragepatternofeachindividual
loudspeaker;theinterferencebetweenthetwocabinets
willbeminimized,butthetotalcoverageof180˚may
betoowideforsomeapplications.Themidandhigh
frequenciesmayalsobereducedforthoseinthecenter
whoaretooclosetotheloudspeakers.
Reducingthesplayanglewillreducethetotal
horizontalcoverage,butitalsocreatesanareaboth
speakersarecovering.Insteadofaneareldhole,
thiswillcausecomb-lteringeffectsinthefrequency
responseintheoverlappingarea.Thesmallerthesplay
angle,themoreenergywillbedeliveredon-axis,butthe
comb-lteringeffectswillgetworseatthesametime.
Toreiterate,though,westronglysuggest
NOTarrayingtheseloudspeakershorizontally.
Experimentationandexperiencewillhelpyound
therighttrade-offforyourapplication.