GTO 4060 (serv.man8) - JBL Car Audio User Guide / Operation Manual. Page 3

The GTO amplifiers require a reliable 
connection to the vehicle’s electrical 
system in order to perform optimally. 
See Figures 1 and 2 for terminal 
connection locations. Please adhere 
to the following instructions carefully: 

Ground Connection
Connect the amplifier’s Ground (GND) 
terminal to a solid point on the vehicle’s
metal chassis, as close to the amplifier 
as possible. Refer to the wire gauge chart
to determine minimum wire gauge size.
Sand away any paint from this location;
use a star- type-lock washer to secure
the connection.

Power Connection
Connect a wire (see chart at right for
appropriate gauge) directly to the
vehicle’s positive battery terminal, and
install an appropriate fuse holder within
30cm of the battery terminal. 

Do not

install the fuse at this time. Route the wire
to the amplifier’s location, and connect it
to the amplifier’s Positive (+12V) terminal.
Be sure to use appropriate grommets
whenever routing wires through the
firewall or other sheet metal. 

Failure to

adequately protect the positive wire from
potential damage may result in a vehicle
fire. When you are done routing and con-
necting this wire, you may install the fuse
at the battery.

Remote Connection
Connect the amplifier’s Remote (REM) 
terminal to the source unit’s Remote Turn-
On lead using a minimum of 0.75mm

2

wire.

NOTE: If your source unit does not have a
remote turn-on connection, connect the
amplifier’s (REM) terminal to the vehicle’s
accessory circuit.

Speaker Connections
Refer to the application guides on the
pages that follow. Speaker connections
should be made using a minimum of 
1.5mm

2

wire.

Wire Gauge Chart
Amplifier

Maximum

Minimum 

Model

Current Draw

Wire Gauge

GTO2060

33A #8 

AWG/8mm

2

GTO4060

45A #7 

AWG/10mm

2

These recommendations assume 3m – 4m
wire runs. If your installation differs 
markedly, you will need to adjust the wire
gauge accordingly.

Figure 1. Terminal connection end plate for GTO4060.

Figure 2. Terminal connection end plate for GTO2060.