JBL GX-A3001 Car Amplifier User Manual


  Open as PDF
of 470
 
22
gX-a602: 2-channel operatIon
Crossover Filter switch:
• Ifyouhaveconnectedtheamplifiertoapairof6"orsmallerfull-rangespeakers,setthe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.
•Ifyouhaveconnectedtheamplifiertoapairoflargefull-rangespeakers(6"x9"orlarger)thatcanhandlesignificantbassand you are not using a
subwoofer in the system, settheCrossoverFilterswitchtothe"FLAT"(full-range)position.
•Ifyouhaveconnectedtheamplifiertoapairofwoofersorsubwoofers,settheCrossoverFilterswitchinthe"LP"(low-pass)position.Thiswilllimit
the amount of high-frequency energy sent to the woofers/subwoofers, improving the clarity of vocals and other midrange sounds.
gX-a602: brIdged operatIon
Crossover Filter switch:Whenoperatingtheamplifierinbridgedmodeintoasubwoofer,settheCrossoverFilterswitchinthe"LP"(low-pass)
position. This will limit the amount of high-frequency energy sent to the subwoofer.
gX-a3001
NOTE:TheGX-A3001’sinternalcrossoverispermanentlysetforlow-passoperation.
Crossover control: TheCrossovercontrollimitstheamountofhigh-frequencyenergysenttothewoofersorsubwoofer.
TheCrossovercontrolsettingyouuseforsubwooferswilldependonthetypeandlocationofyoursystem’ssubwoofer.
StartbysettingtheCrossovercontroltoafrequencysomewhatlowerthanthehigh-passcrossoversettingyouusedforthe
system’sotherspeakers.Afterlisteningtomusiconthesystemforatime,fine-tunetheCrossovercontrolsettingtoachieve
asmoothtransitionfromthesubwoofertotherestofthesystem’sspeakerswhileavoidinga"hole",wherethesoundsthat
occur between the subwoofer and other speakers seem to drop out. The illustration to the right shows the recommended
Crossovercontrolfrequencyrange.
SET THE INPUT LEVEL
1. Turn all the Level controls on all amplifiers fully counter-clockwise.
2.Playsomedynamicmusicthroughyoursourceunitandturnitsvolumeupto3/4volume.
3. Slowly turn the Level control on the front-channel amplifier clockwise until the music begins to sound distorted.
4. Turn the Level control counter-clockwise slightly until the music no longer sounds distorted.
5.Ifyou’reusingmorethanoneamplifierorareusingtheGX-A604,repeatSteps3–4forallremainingamplifierLevelcontrols.
Subwoofers
and Woofers
 previous next