Specifications

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5.6 PHASE-SHIFTADJUSTMENT
Thephase shift function of the EA1450XT/EA460-300XTcan not bedeactivated,as it is per-
manentlyinthesignalchain.Thephase-shiftcontrolenablesyoutomatchtheacousticalphase
relations of subwoofer and the speaker system playing in the front doors. The target is, that
both speaker systems, normally separated by approx. 3m of distance, shall play acoustically
“in-phase”atthedriversseatlocation.Agoodmatchoftheacousticalphasebetweensubwoofer
andthe systemin thefront doorswill giveyouthe impressionof basssounds comingfrom a
placeinfrontofyou.Ortheotherwayround,thesubwooferplayinginthetrunkofyourcarcan
notbelocalizedthateasily.
Thesecondadvantageis,thattheupperbassregion–i.e.wherethesoundwavesradiatedby
thesubwooferandthekickbassorfrontdoormountedcomponentsystemarecrossingover-will
soundconsiderablymorepreciseandtight.Thisphaseadjustmentcanonlybedeterminedby
ear,soyouwillneedsomebodytohelpyoutoobtainbestphasematch.Tojudgetheeffectofthe
phase-shiftadjustment,youmustsitonthedriversseat,andsomebodymustadjustthephase
shiftcontrolknobuntilthesoundreproductioninthebassregionisbest.Furthermore,itmightbe
necessarytoinvertthe(connection)polarityofyoursubwoofer–andre-adjustthephase,ifyou
cannotfindapropermatchwiththenormalin-phasesubwooferconnection.