EM Phaser EA1450XT - Subsonic Highpass Crossover Adjustment; Input Gain Adjustment

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5.4 SUBSONICHIGHPASSCROSSOVERFREQUENCYADJUSTMENT
When driving a subwoofer in bandpass (“BPF”) operation mode, you should also adjust the
subsonic highpass frequency.This isdone by adjustingthe “HPF” potentiometer. This setting
depends the size and the power handling of the installed subwoofer system. The higher the
subsoniccrossoverfrequencyisset,thehigherthemechanicalpowerhandlingoftheconnected
subwoofersystemwillbe.Thetrade-offisreducedlowendextension!Thesubsonichighpass
cannotbebypassed,whentheoperationmodeissettoBPFmode,butyoucansettheHPF
potentiometerat10Hz,sothesubsonichighpassfilteringremainsinaudible.
5.5 INPUTGAINADJUSTMENT
To reach a maximum in dynamic response from each individual head-unit/amplifier/speaker
combination,itisimportanttosettherespectiveinputlevelcontrols(„GAIN“)ofallchannelpairs
correctly.Beforeyoustart,youMUSTsetalltonecontrols(Bass,Mid,Treble,Loudnessetc.)
andthefaderonthehead-unittotheirneutralorcenterpositions.
Nowturnallinputgaincontrolsoftheinstalledamplifiersanti-clockwisetotheirminimumposi-
tionsandstartwiththechannelpair,thatdrivesthesubwoofersystem.Thelowpasslevelremote
control-ifinstalledinyoursystemconfiguration-shouldbesettoapproximately3/4open,so
thereisenoughheadroomtoturnupthebassvolumelateron.
➡SUBWOOFERCHANNEL
Set the volume control of your head-unit to approximately 3/4 of full volume, while playing a
dynamicpieceofmusic.Slowlyincreasetheinputgaincontrolofthechannelpair,thatdrives
thesubwoofer(s),byturningtheGAINcontrolclockwiseuntilyoucanjustaboutheardistorted
soundscomingoutofyoursubwoofersystem.Reducethemainvolumelevelonyourhead-unit
toamediumlisteninglevel.
➡SATELLITECHANNELS
Slowly increase the inputgain controlof the channelpair, that drives thesatellite system, by
turning the GAIN potentiometer clockwise, until you reach a good tonal balancewith a slight
emphasisinthebassregion.Aimatafullbodiedbassresponse.Nowslowlyturnuptheinput
GAIN control of the remaining channelpair(s) - if any- until you reacha good tonal balance
betweenfrontandrearsatellites.
➡FINETUNINGOFALLCROSSOVERFREQUENCYPOINTSETTINGS
Finallyyoucanattempttofine-tunethehigh-passandband-passcrossoverfrequenciesonyour
amplifier,toobtainthebestsoundqualityofallloudspeakersconnectedtoyourcaraudiosystem.