Read JBL GX-A3001 Service Manual online
Service Manual
GX-A3001
300-Watt mono car subwoofer power amplifier
Released EU2014
Harman Consumer Group, Inc.
Rev 0, 00/20XX
8500 Balboa Boulevard
OWNER’S MANUAL
2
TROUBLESHOOTING
5
TECHNICAL SPECIFICATIONS
7
BLOCK DIAGRAM
8
SCHEMATIC DIAGRAMS
9
CONTENTS
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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
16
gX-a3001 speaker connectIons
Minimum speaker impedance; 2 ohms (single subwoofer); 4 ohms (2 subwoofers)
The GX-A3001 has two parallel sets of speaker connectors, allowing you to connect two subwoofers.
The GX-A3001 has two parallel sets of speaker connectors, allowing you to connect two subwoofers.
Fuses 20A
+12V
4-Ohm Subwoofer
4-Ohm Subwoofer
• If you are using a single subwoofer you can connect it to either set of GX-A3001 speaker connectors.
• If you are using two 2-ohm subwoofers you can connect them to one of the sets of connectors in series to be above the required 2-ohm minimum
• If you are using two 2-ohm subwoofers you can connect them to one of the sets of connectors in series to be above the required 2-ohm minimum
impedance.
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gX-a3001 Input connectIon
Use a "Y"-adapter to connect your source unit or processor’s subwoofer line output to the amplifier’s left and right inputs, as shown in the illustration
below. If your source unit does not have a dedicated subwoofer output you can connect the rear left/right outputs to the amplifier’s left and right inputs.
L+L–R–R+
"Y"-Adapter
Source Unit
Subwoofer Output
See Set The Crossover Controls, on page 20, for information about setting the amplifier’s controls.
To use the speaker-level inputs instead of the line-level inputs, see Using The Speaker-Level Inputs, on page 12.