7
Lowlevel(RCA)inputsignalispreferredforbest
performance.Typicaltrunk-mountinstallations
requirea17-20footRCAcable.Mosttrucksand
behind-seatapplicationsrequirea6-12footRCA
cable.UsingtwistedpairconstructionRCAcables
will minimize noise.
Theadjustablecrossoverisusedtofilterout
frequenciesabove25Hz~120Hz.Adjustittowhere
the BAK1500 sound output blends with the rest of
the sound system.
The phase control compensates for delay between
the BAK1500 output and the rest of the sound
system. Begin with the phase control set to 0
degrees.Ifthesoundisadequatefromthenormal
listeningpositioninsidethevehicle,nofurther
adjustment is necessary. If the sound is thin or
lacking bass, adjust the phase control until the bass
is full and punchy.
Theinputlevelcontrol(LEVEL)isusedtoobtainthe
best possible match between the head unit audio
output and the amplifier input. Begin by turning
theinputlevelcontrolfullycounterclockwise.Next,
turnuptheheadunitvolumecontrolaround3/4of
thewayup.Adjusttheinputlevelcontrolclockwise
until audible distortion is heard, then slightly
counterclockwisetoprovidethebestmatch.
TheLEDindicatorilluminatesgreenduringnormal
operation.
Input Signal Connections
Low Level (RCA)
Crossover Frequency 
Control
Phase Control
Input Level Control
LED Indicator
Control Setup and Adjustment
INSTALLATION