JBL GT5.0c, GT6.0c, GT4.0c User Manual
GRAND TOURING SERIES
Automotive
Component Systems
GT4.0c, GT5.0c, GT6.0c Owner’s Manual
GENUINE JBL
02
Thank you for purchasing a
JBL Grand Touring 2-way
Component System. We’ve
organized this manual to make
your installation as simple and
trouble-free as possible. Please
read through it completely
before proceeding. If, after
having read it, you decide that
you would rather leave installation to a professional, consult
your JBL Grand Touring Dealer.
Autosound at Its Best
Your JBL Component System is
built to meet the same rigorous
standards of construction and
performance that have long
established JBL’s renowned
home and professional speaker
systems.
Your Component System has
been designed using a combination of technologies that bring
high value to high performance.
The tweeter dome used in
your Component System tweeter
is manufactured from a
proprietary material known as
Titanium Composite. This
material combines the control
and damping of an advanced
polymer with the reinforcing
stiffness of vapor-deposited
titanium to prevent breakup at
high levels.
Similarly, the woofer cones are
manufactured with a proprietary
copolymer which is reinforced
with graphite in order to deliver
the clarity and effortless power
that have made JBL famous.
The pattern molded into this
material further stiffens it,
reducing breakup at high listening levels. This cone is suspended by a heavy Butyl rubber
surround, which serves to absorb
any remaining cone resonances
for the clearest, most articulate
reproduction of voices and other
mid-range sounds. As a bonus,
the Butyl rubber surround is
impervious to temperature
extremes and humidity,
making it ideal for automotive
applications.
By following the installation recommendations and suggestions
included in this manual, you will
be assured of many years of
trouble-free enjoyment from
your Grand Touring series
loudspeakers.
Component System Parts
ANGLE MOUNT
2
1
Line up tab with slot on bracket
Push tweeter into bracket and turn clockwise
2
1
Your new Component System
consists of the GTC04 neodymium
magnet tweeter and either a 4",
5-1/4", or 6-1/2" midwoofer. Both
the GTC04 and the midwoofer
have high-quality passive
crossover parts already built into
them. Figure 2 is an illustration
of the proper wiring procedure of
the Component System.
Tweeter Installation
The GTC04 has been supplied
with both Angle and Flush
mounting brackets. Figures 1 and
2 show the proper way to flushand angle-mount the GTC04. The
mounting hole diameter for the
flush-mount frame is 1-3/4".
Important Paperwork
Before proceeding, be sure to put
the sales receipt from your JBL
Component System purchase in a
safe place. It is necessary to validate your Limited Warranty.
Having access to the receipt is
also valuable for insurance purposes and when it comes time to
resell your vehicle.
Figure 1
03
04
2
1
FLUSH MOUNT
Line up tab with slot on bracket
1
Push tweeter into bracket and
2
turn clockwise
IN-LINE CROSSOVER
(DO NOT CUT OR BYPASS)
Figure 2
GTC04 WIRING HARNESS
Lead from GTC04 tweeter
Small 0.11"
(-) Terminals
Large 0.25"
(+) Terminals
Midwoofer Terminal Block
Attach to
two outermost tabs
CONNECT
TO
AMPLIFIER
Connect
to
Amplifier
or
head unit
Typical installation of the GT4.0c and GT5.0c
woofers with grilles as shown in Figure 2a.
Trim Ring
Car Door
Grille Screen
Figure 2a. Grille mounting
Tweeter Output Level
IN-LINE CROSSOVER
(mylar capacitor)
4 ohms /
5 watt (min)
resistor
(sold separately)
cut wire here
after capacitor
The GTC04 is a very efficient
tweeter. If there is a need to
lower the tweeter output level,
a pair of 4 ohm / 5 watt resistors
can be connected in series with
the GTC04 as shown in Figure 3.
To avoid short circuits, make
sure that heat-shrink tubing or
electrical tape is used to cover all
exposed wiring.
The in-line crossover acts as a
high-pass filter as well as a protection device that keeps the
tweeter from being over-exerted
by low frequencies that it was not
designed to reproduce. Under
normal circumstances this
crossover should not be bypassed
or removed for any reason.
Bypass the installed capacitor
only when using an outboard
active crossover or a custombuilt passive crossover set above
5kHz.
05
Figure 3
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