AXTON A100 - Page 7

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5. CROSSOVER ADJUSTMENTS
Fortheampliertoperformbestwithyourspeakers,theelectroniccrossovercontrolsmust
be set and adjusted accordingly.
5.1 SELECTING THE OPERATION MODE
You must select and set the appropriate operation mode before you can proceed to
adjustcrossoverfrequencypoints.Thisoperationmodedependsonthespeakersystem
connectedtotherespectiveamplierchannels.
➞SelectHIGHPASS,ifthespeakersystemisacomponent-,coaxial-ortriaxial-type.
➞SelectLOWPASSforasubwoofersystem.
➞SelectFULL,ifyourspeakersystemwillhandleafullrangesignalwithoutelectricalor
mechanical overload.
5.2 HIGH PASS CROSSOVER FREQUENCY
Forsatellitespeakersystems,selectthe“HPF”mode,tocutoffthebasscontentinthe
music signal.
Highpasslteringwilltakeawayunnecessarymechanicalandelectrical‘strain’fromthe
connected coaxial or component speaker systems. Depending on cone surface, voice-coil
diameter and the power handling of the speakers, the following recommendations can be
issued:
FRONTDOORSATELLITESPEAKERSYSTEM(„HPF”MODE) HPCROSSOVER
         FREQUENCY
13cm2-wayComponentSystem     80-110Hz
16cm2-or3-wayComponentSystem    50-80Hz
REARSATELLITESPEAKERSYSTEM(„HPF”MODE)  HPCROSSOVER
         FREQUENCY
13cm2-wayCoaxialorComponentSystem    100-120Hz*
16cm2-wayCoaxialorComponentSystem    100-120Hz*
6x9”or7x10”TriaxialSpeakerSystem    100-120Hz*
*Whenasubwooferispartoftheaudiosysteminstall.
5.3 LOW PASS CROSSOVER FREQUENCY
Select“LPF”,toactivatethelowpasslteroftheintegratedelectroniccrossover.
TheLOWPASScut-offfrequencysettingdependsonthewoofersystemandeachvehicleis
different!Asaruleofthumb,settingsinbetween60to90Hzwillusuallygivesolidresults.
Thewooferlowpassfrequencypointismostlyamatteroftaste,andmustthereforebe
‘playedbyear’.
5.4 SUBSONIC CROSSOVER FREQUENCY (A100)
Nowproceedtoadjustthesubsonichighpassfrequency.Thissubsoniccrossoverfrequency
point depends on the size and the power handling of the installed subwoofer system. The
higherthesubsoniccrossoverfrequencyisset,thebetterorhighermechanicalpower
handlingwillresult.Thetrade-offisreducedlowendextension!Thesubsonichighpass
cannotbebypassed.Butyoucansetthepotentiometertoavalueof10Hztomake
subsoniclteringcompletelyinaudible.
5.5 BASS BOOST (A100)
DependingonthesizeandoutputcapacityofthesubwoofersystemdrivenbytheA100
amplier,itmaybesonicallybenecialtoturnthebassboostclockwisetothe18dB
position,whichwillemphasizethe45Hzfrequencyrangeoutputformore„basspunch“.
Theemphasisat45Hzcausesa„fatter“bassresponse,whichoftencreatesthatextrabit
offun,dependingonthemusicpreferences.Byemphasizingthe45Hzrange,theA100will
also limit a bit earlier, e.g. the distortion-free output is slightly reduced.
5.6 INPUT GAIN
Toreachamaximumindynamicresponsefromeachindividualhead-unit/amplier/speaker
combination,itisimportanttosettherespectiveinputsensitivity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amplierscounterclockwisetotheirminimum
positions and start with the channel pair, that drives the subwoofer system.
SUBWOOFER CHANNEL(S)
Set the volume control of your head-unit to approximately ¾ of full volume, while playing a
dynamic piece of music. Slowly increase the input gain control of the channel pair driving
thesubwoofer(s),byturningtheGAINcontrolclockwise.Increaseclockwiseuntilthebass
starts to distort. Reduce the main volume level of your head-unit to a medium listening level.
Proceedwithfurtherchannels,ifapplicable.
SATELLITE CHANNELS
Slowly increase the input gain control of the channel pair driving the satellite system, by
turningtheGAINcontrolclockwise.Increaseclockwiseuntilyoureachagoodtonalbalance
with a slight emphasis of the bass range. Repeat for all further channels.
FINE TUNING OF ALL CROSSOVER FREQUENCY POINT SETTINGS
Finallyyoucanattempttone-tunetheHP,andLPcrossoverfrequenciesonyouramplier
setup, to reach the maximum tonal balance and channel integration of all loudspeakers
connectedtoyourcaraudiosystem.DuetospacelimitationonA500sidepanel,thismodel
isprovidedwithaselectablex70Hzhighpasslter.