Read JBL GX-A604 Service Manual online
Service Manual
GX-A604
435-Watt full range 4-channel car power amplifier
Released EU2015
Harman Consumer Group, Inc.
Rev 0, 00/20XX
OWNER’S MANUAL
2
TROUBLESHOOTING
9
TECHNICAL SPECIFICATIONS
11
PACKING LIST
12
BLOCK DIAGRAM
13
SCHEMATIC DIAGRAMS
14
CONTENTS
www.jbl.com
E
ng
lis
h
5
ground (gnd) connectIon
Connect a wire (minimum 10 AWG – 5.3 mm
2
)
from the amplifier’s GND terminal directly to a
solid point on the vehicle’s chassis.
• For a good connection, use sandpaper to clear
• For a good connection, use sandpaper to clear
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. Connect a wire (minimum 10 AWG – 5.3 mm
2
)
directly to the battery’s positive (+) terminal.
2. Install a fuse holder for a 50 A fuse (GX-A604,
GX-A3001) or a 30 A fuse (GX-A602) on this
wire within 18" (46 cm) of the battery’s (+)
terminal. Do not install the fuse in the holder
at this time.
3. Route this wire to the amplifier’s location and
connect it to the amplifier’s +12 V terminal.
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. When you are finished routing and connecting
this wire, install the appropriate fuse in the
holder you installed near the battery.
(GX-A604, GX-A3001 – 50 A fuse;
GX-A602 – 30 A fuse)
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 mm
2
) Wire
>#10 AWG (5.26 mm
2
) Wire
>#10 AWG (5.26 mm
2
) Wire
6
speAker And input connections
Always connect the (+) speaker terminal on the amplifier to the (+) terminal on the speaker and the (–) speaker terminal on the amplifier to the (–) terminal
on the speaker.
IMPORTANT: Make sure the (+) and (–) bare wires do not touch each other or the other terminal at both the amplifier terminals and speaker
IMPORTANT: Make sure the (+) and (–) bare wires do not touch each other or the other terminal at both the amplifier terminals and speaker
terminals. Touching wires can cause a short circuit that can damage the amplifier.
gX-a604 speaker connectIons: 4-channel operatIon
Minimum speaker impedance: 2 ohms (each)
• Connect the front speakers to the FL and FR (+) and (–) terminals.
• Connect the rear speakers to the RL and RR (+) and (–) terminals.
• Connect the front speakers to the FL and FR (+) and (–) terminals.
• Connect the rear speakers to the RL and RR (+) and (–) terminals.
Speaker
Fuses 20A
Front Left Speaker
Rear Left Speaker
Front Right Speaker
Rear Right Speaker
www.jbl.com
E
ng
lis
h
7
gX-a604 Input connectIons: 4-channel operatIon
Connect your source unit or processor’s front and rear left and right outputs to the amplifier’s inputs as shown in the illustration.
Source Unit
Front Line Outputs
Rear Line Outputs
See Set The Crossover Controls, on page 20, for information about setting the amplifier’s controls for 4-channel operation.
To use the speaker-level inputs instead of the line-level inputs, see Using The Speaker-Level Inputs, on page 12.
To use the speaker-level inputs instead of the line-level inputs, see Using The Speaker-Level Inputs, on page 12.