User`s manual

ManualsBrandsPROEL ManualsComputer equipmentNEXT

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Linkwi tz‐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engineers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fulf il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perio d,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.

2