JBL GX-A602 Manuale utente
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5
ground (gnd) connectIon
Connectawire(minimum10AWG–5.3mm2)
from the amplifier’s GND terminal directly to a
solid point on the vehicle’s chassis.
•Foragoodconnection,usesandpapertoclear
the paint from the metal surface at this chassis
location. Use a star-type lock washer to secure
the wire’s connection.
poWer (12 V) connectIon
1.Connectawire(minimum10AWG–5.3mm2)
directlytothebattery’spositive(+)terminal.
2.Installafuseholderfora50Afuse(GX-A604,
GX-A3001)ora30Afuse(GX-A602)onthis
wirewithin18"(46cm)ofthebattery’s(+)
terminal. Do not install the fuse in the holder
at this time.
3. Route this wire to the amplifier’s location and
connectittotheamplifier’s+12Vterminal.
Be sure to use appropriate grommets
whenever routing wires through the firewall
or other sheet metal. IMPORTANT: Failure
to adequately protect the positive wire from
potential damage may result in a vehicle fire.
4.Whenyouarefinishedroutingandconnecting
this wire, install the appropriate fuse in the
holder you installed near the battery.
(GX-A604,GX-A3001–50Afuse;
GX-A602–30Afuse)
Power
Connectors
Audio System
Head Unit
Chassis Ground
(bare metal)
50 A Fuse (GX-A604/GX-A3001)
30 A Fuse (GX-A602) 18" (46 cm)
Remote Turn-On
(optional)
>#18 AWG (0.82 mm2) Wire
>#10 AWG (5.26 mm2) Wire
>#10 AWG (5.26 mm2) Wire
12
usIng the speaker-leVel Inputs
If your source unit doesn’t have line-level outputs you can use the included speaker-level input harness to connect
theamplifiertothesourceunit’sspeakeroutputs.Fromlefttoright,theconductorsare:L+,L–,R–,R+(seethe
illustration to the right). The speaker-level connectors on all GX-series amp models follow this wiring configuration.
Follow the instructions in the previous sections, substituting the speaker-level connectors for the line-level
connectors.
gX-a602 speaker connectIons; 2-channel operatIon
Minimum speaker impedance: 2 ohms (each)
ConnecttheleftandrightspeakerstotheFLandFR(+)and(–)terminals.
Fuse 25A +12V
Speaker
Front Left Speaker Front Right Speaker
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13
gX-a602 Input connectIons: 2-channel operatIon
Connectyoursourceunitorprocessor’slineoutputsasshownintheillustrationbelow.
L+L–R–R+
Line Outputs
Source Unit
See Set The Crossover Controls, onpage20,forinformationaboutsettingtheamplifier’scontrolsfor2-channeloperation.
To use the speaker level inputs instead of the line-level inputs, see Using The Speaker-Level Inputs, on page 12.
14
gX-a602 speaker connectIons: brIdged operatIon
Bridged operation provides a single high-power channel for a subwoofer
Minimum speaker impedance: 4 ohms
ConnectthesubwoofertotheRL(+)andRR(–)terminals.NOTE: You can connect two 2-ohm subwoofers in series to maintain the required 4-ohm
impedance for bridged operation.
Fuse 25A +12V
Speaker
Subwoofer
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15
gX-a602 Input connectIons: brIdged operatIon
Connectyoursourceunitorprocessor’ssubwooferlineoutputtotheamplifier’sleftinput,asshownintheillustrationbelow.
NOTE: Usea"Y"-adaptertoconnectthesourceunittotheamplifier’sleftandrightinputjacks.
L+L–R–R+
Source Unit
"Y"-Adapter Subwoofer
Output
See Set The Crossover Controls, onpage20,forinformationaboutsettingtheamplifier’scontrolsforbridgedoperation.
To use the speaker-level inputs instead of the line-level inputs, see Using The Speaker-Level Inputs, on page 12.
24
troubleshootinG
If your amplifier isn’t performing the way you think is should, check to see if the problem is covered in this section before calling your dealer or
contacting JBL customer service.
PROBLEM CAUSES AND SOLUTIONS
Nosound(theamplifier’sPowerLEDisoff) •Checkthattheamplifier’s+12VandGNDconnectionshavebeenproperlymade.
•Checkifthefuseonthe+12Vwirelocatednearthebatteryisblown:Ifso,replaceitwithan
identical fuse.
•Checkallamplifierfuses;ifanyareblown,replacethemwithidenticalfuses.
•Ifyouareusingtheamplifier’sREMconnectionforturn-on,checkthatthewireisproperly
connectedtotheaudiosystem’sremoteturn-onwireortothevehicle’sACCpowerterminal.
Nosound(theamplifier’sPowerLEDisorange) •Checkthatallamplifierinputandspeakerconnectionshavebeenproperlymade.
•Checkthattheamplifier’sLevelcontrolsarenotturnedallthewaydown(counter-clockwise).
•Checkthatthevehicleaudiosystem’ssourceunit’svolumecontrolisnotturnedalltheway
down.
Nosound(theamplifier’sProtectionLEDisred) •Confirmthatthevehicle’selectricalsystemissupplyingbetween9Vand16VDCtothe
amplifier. If the supply voltage is outside of this range, correct the condition before attempting to
use the amplifier.
•Iftheamplifierhasoverheated,waituntilithascooleddownbeforeattemptingtouseitagain.
•Disconnectallspeakersfromtheamplifierandattempttoturnitonagain:
–Iftheamplifierturnson(thePowerLEDisorange),thereisashortcircuitinoneormoreofthe
speakerwires.Correctallshortcircuitsbeforereconnectingthespeakerstotheamplifier.
–Iftheamplifierdoesnotturnon(theProtectionLEDisstillredandthePowerLEDisoff),
contact your authorized JBL dealer for assistance.
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25
PROBLEM CAUSES AND SOLUTIONS
Sound only comes from some of the speakers
connected to the amplifier
•Checkthatthevehicleaudiosystem’ssourceunit’sbalanceandfadercontrolsaresettotheir
center (midpoint) positions.
•(GX-A604):Checkthatthesettingoftheamplifier’sModeSwitchmatchestheinputandspeaker
connections made to the amplifier
Sound is too quiet, even with the vehicle audio
system’s source unit volume all the way up
•Checkthattheamplifier’sLevelcontrolsarenotturnedtoolow.SeeSet The Input Level, on
page 22, for information about setting the Level controls.
Sound in the front/rear speakers is distorted •Makesuretheamplifier’sCrossoverFilterswitchforthedistortedchannelsissettoHP.
•SettheCrossovercontrolforthedistortedchannelstoahighersetting.
•Checkthatthedistortionisnotoriginatingfromthevehicleaudiosystem’ssourceunit.
Sound in the subwoofer is distorted •(GX-A604,GX-A602):SettheBassBoostswitchto"OFF".
•(GX-A3001):Whilelisteningtobass-heavymusic,turntheBassBoostcontrolallthewaydown,
and then gradually increase it until the distortion begins to return. Reduce the Bass Boost
control setting slightly to eliminate the distortion and leave it set there.
•Checkthatthedistortionisnotoriginatingfromthevehicleaudiosystem’ssourceunit.
26
specificAtions
GX-A604 GX-A602 GX-A3001
Maxpower(15.5V,1kHz,10%THD,
total ch, 2 ohms) 435W 280W 415W(15.5V,50Hz,10%THD,
2 ohms)
Rated power output @ 4 ohms 60Wx4 60Wx2 200Wx1
Bridged power output
(4ohms,1%THD) 170Wx2 170Wx1 N/A
THD+Natratedpower <1% <1% <1%
Signal-to-noise(2V@4ohms) >75dB >75dB >75dB
Effective damping factor (4 ohms) >50 >50 >50
Frequency response (–3 dB) 20Hz–20kHz±1dB 20Hz–20kHz±1dB 10Hz–320Hz
Maximuminputvoltage 20V 20V 20V
Maximuminputsensitivity 200mV 200mV 200mV
Fuse size 20Ax2 25A 20Ax2
Dimensions(HxWxD) 2-1/16"x11-13/16"x8-1/8"
(52mmx300mmx206mm) 2-1/16"x7-13/16"x8-1/8"
(52mmx198mmx206mm) 2-1/16"x11-7/16"x8-1/8"
(52mmx291mmx206mm)
Weight 5.3lb(2.4kg) 3.8lb(1.7kg) 5.3lb(2.4kg)
12345678
A
B
C
D
8
7654321
D
C
B
A
powersupply
1
2
3
GROUND
REM
+12V
bassboost
45Hz 0-12dB
power
P1
A5
FUSE
P2
HI-INautoON
A1
GX-A602
A2
PRT
INPUT SENS
0.2V-4V
A1 A2 A3 A4
LP
FLAT
A6 L -out
2Ω/4Ω
Linput
ClassABAudioPowerAmplifier
inputselector
variablecrossover
1
2
3
4
HIIN
Pitch 2.5mm
A
bassboost
45Hz 0-12dB
B5
INPUT SENS
0.2V-4V
crossover
80Hz 12dB/ oct
B1
B2 B3
HP/LP pass
B4
LP
FLAT
B6 4R +out
2Ω/4Ω
Rinput
ClassABAudioPowerAmplifier
inputselector
variablecrossover
A
A1
A2
3 2
1
4
A
7 6
5
8
B
HP
HP
10Hz 80Hz ＞40KHz
crossover
80Hz 12dB/ oct
HP/LP pass
10Hz 80Hz ＞40KHz
JBL GX-A602 BLOCK DIAGRAM
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