PROEL DSO480 - Factory Presets; Warranty Information

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Thegraphshowsthreedifferentlowpassfiltershapes.
Number1isastandard24dB/OctaveLinkwith‐Riley
curve.
Number2isa48dB/OctaveLinkwitz‐Riley.

Ascanbeseen,number2issignificantlysteeperinroll‐
offthannumber1,aswouldbeexpected.

However,number3isa12dB/OctaveButterworthf
ilter
withanEllipticalLowPassfilterfollowingit.This
producesacombinedroll‐offveryclosetothatofthe48
dB/Octave(withthesideeffectoftheresponserising
againaftertheinitialdropfromthepassband).



Toproduceacrossoverfilterofthisshapeitissimplyacaseofse
ttingthelow(orhigh)passfilterforthat
outputtothedesiredcrossoverfrequency,andselectinga12dB Butterworthresponse:

OP1 Output 1 HPF /~~
250Hz Butterworth 12dB
Thenselectaparametricsectiononthesameoutput,andmodifyitsbehaviour(usingtheENTERkey)untilthe
correspondingHPFEllipticalfilterissele
cted.Settheturnoverfrequencyofthisfiltertobethesameasthatof
thecrossoverfilter.Makesureyouchoseahighpassellipticaltoworkwithahighpasscrossover,andlow
passellipticaltoworkwithalowpasscrossover.

InA Input A HPF:1/~~
250Hz HP Ellip
Factorypresets
DSO480isfactorypreloadedwithpresetsforthePROELloudspeakerlines.
Thepresetswereoptimisedbyengine ersatPROELtoachievethebestperformance.
AsageneralruleSatandAuxoutputsarenotlockedandcanbeprogrammedbyuserstofulfiltheirneeds.All
Auxoutputsaremutedbydefaul
t.
Outgainistrimableandthedelaytimeisunlockedorlinkedwithanotheroutput.Thedefaulttimealignment
wascalculatedinPROEL’sanechoicchambertakingintoaccountthemostcommonspeakerplacement
positions.
Note:AlwayscheckProelwebsitehttp://www.proelgroup.comforupdatesandsoftwaredownload.
Warranty
Thisproductiswarrantedagainstdefectsincomponentsandworkmanshiponly,foraperiodoftwoyears
fromthedateofshipmenttotheenduser.
Duringthewarrantyperiod, PROELwill,atitsdiscretion,eitherrepairorreplaceproductsthatprovetobe
defective,providedthattheproductisreturned,shi
ppingprepaid,toanauthorisedPROELservicefacility.
Defectscausedbyunauthorisedmodifications,misuse,negligence,actofGodoraccident,oranyuseofthis
productthatisnotinaccordancewiththeinstructionsprovidedbyPROEL,arenotcoveredbythiswarranty.
Thiswarrantyisexclusiveandnootherwarrantyisexpressedori
mplied.
PROELisnotliableforconsequentialdamages.
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