JBL GX-A602 Car Amplifier User Manual


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SET THE CROSSOVER CONTROLS
gX-a604: 4-channel operatIon
Input Mode switch: SettheInputModeswitchinthe"4CH"position.
Front Crossover Filter switch: SettheFrontCrossoverFilterswitchinthe"ON"(high-pass)position.Thiswilllimittheamountoflow-frequency
energy sent to the speakers, significantly reducing distortion and preventing the speakers from damage. Exception: If you have connected large
full-rangespeakers(6"x9"orlarger)thatcanhandlesignificantbasstotheamplifier’sfrontchannelsand you are not using a subwoofer in the
system, settheFrontCrossoverFilterswitchtothe"OFF"(full-range)position.
Rear Crossover Filter switch: SettheRearCrossoverFilterswitchinthe"HP"(high-pass)position.Thiswilllimittheamountoflow-frequency
energy sent to the speakers, significantly reducing distortion and preventing the speakers from damage. Exception: If you have connected large
full-rangespeakers(6"x9"orlarger)thatcanhandlesignificantbasstotheamplifier’sfrontchannelsand you are not using a subwoofer in the
system,settheRearCrossoverFilterswitchtothe"FLAT"(full-range)position.
Rear Crossover control:WhentheRearCrossoverswitchissetin
the"HP"position,theRearCrossovercontroldeterminesthefrequency
where the low frequencies sent to the speakers begin to be reduced in
volume.
Whenrunningtheamplifierinthe4-channelmodeyoushouldsetthe
RearCrossovercontrolaccordingtothesizeofthespeakersconnected
to the amplifier channels – the smaller the speakers the higher you
need to set the control to protect the speakers from damage. After
initially setting the crossover frequency, listen to music with strong bass
that you are familiar with. If the speakers sound distorted or distressed, move the crossover frequency control to a higher setting to eliminate the
distortion/ distress. The illustration to the right shows the recommended crossover filter frequency ranges for different speaker sizes.
gX-a604: 3-channel operatIon
Input Mode switch: SettheInputModeswitchinthe"4CH"position.
Front Crossover switch: SettheFrontCrossoverswitchinthe"ON"(high-pass)position.Thiswilllimitthe
amount of low-frequency energy sent to the speakers, significantly reducing distortion and preventing the
speakers from damage.
Rear Crossover Filter switch: Whenconnectingasubwooferorwoofertotherearchannels,settheRear
CrossoverFilterswitchinthe"LP"(low-pass)position.Thiswilllimittheamountofhigh-frequencyenergysent
to the woofers or subwoofer, improving the clarity of vocals and other midrange sounds.
6" and 5" Speakers 4" and Smaller Speakers
Low-Pass Operation:
Subwoofers and Woofers
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