GRAND TOURING SERIES
Automotive
Component Systems
GT4.0c, GT5.0c, GT6.0c Owner’s Manual
GENUINE JBL
Component System Parts
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
Figure 1
03
The GTC04 has been supplied
with both Angle and Flush
mounting brackets. Figures 1 and
2 show the proper way to flush-
and angle-mount the GTC04. The
mounting hole diameter for the
flush-mount frame is 1-3/4".
ANGLE MOUNT
2
1
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 vali-
date your Limited Warranty.
Having access to the receipt is
also valuable for insurance pur-
poses and when it comes time to
resell your vehicle.
1
Line up tab with slot on bracket
Push tweeter into bracket and turn clockwise
2
IN-LINE CROSSOVER
(DO NOT CUT OR BYPASS)
Typical installation of the GT4.0c and GT5.0c
woofers with grilles as shown in Figure 2a.
04
GTC04 WIRING HARNESS
2
1
CONNECT
Trim Ring
TO
AMPLIFIER
FLUSH MOUNT
Line up tab with slot on bracket
1
2 Push tweeter into bracket and
turn clockwise
Lead from GTC04 tweeter
Small 0.11"
(-) Terminals
Connect
to
Car Door
Amplifier
or
head unit
Large 0.25"
(+) Terminals
Attach to
two outermost tabs
Grille Screen
Figure 2a. Grille mounting
Midwoofer Terminal Block
Figure 2
high-pass filter as well as a pro-
tection 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 custom-
built passive crossover set above
5kHz.
Tweeter Output Level
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.
IN-LINE CROSSOVER
(mylar capacitor)
05
cut wire here
after capacitor
The in-line crossover acts as a
4 ohms /
5 watt (min)
resistor
(sold separately)
Figure 3
Installation of the GT4.0c woofer as shown in Figures 4a and 4b.
06
Mounting Ears Removed
Figure 4a
Removable Mounting Ears on
GT4.0c
Bend up and down repeatedly
to break off or use tin snips.
• Some Toyota installations may require mounting ears to be removed from opposite sides.
• Some European car installations may require all four ears to be removed.
Figure 4b
Two-Screw Mounting Configuration
Installation of the GT6.0c woofer
with the Intermount II (pat. pend.)
mounting system is shown in
Figures 5a, b, c.
Figure 5a
Figure 5c
07
Mounting
Ring
Hole Cutout
Match Notch on
Speaker with
Notch on Trim Ring
Mounting
Hooks
Rotate
to
Lock
Figure 5b
Rotate
to Lock
Foam
Slots for
Gasket
Mounting
Hooks
Foam
Gasket
Mounting
Ring
Rotate
to Lock
Mounting
Slots
Grille
Screen
Grille
Trim Ring
Mounting
Hooks
Front View
Mounting for US 6-1/2"
Honda/Toyota
Factory Location
Custom Door Mounting with Grille
Screw Patterns Fit DIN (European)
165/170mm Mounting Holes
Rear View
Figure 5e
Figure 5d
08
Hole Cutout
Mounting the GT6.0c woofer in
165/170mm DIN (European)
installations using the Intermount II
clips shown in Figures 5d and 5e.
Clips
Mounting
Surface
Rear Mounting
Front Mounting
The best system integration is
achieved when the tweeter is
mounted close to the midwoofer
speaker. This helps smooth the
transition from the midrange and
tweeter crossover point.
Component Placement
Because of the JBL Component
System’s small size and ex-
tremely versatile mounting
options, there are an almost infi-
nite number of placement options
to achieve excellent sound quality
in any vehicle. Please consider
the following statements to help
you get the most from your
system.
2. The best center image will be
achieved when the distance from
the left speaker and the right
speakers are as equal as possi-
ble from your listening position.
This is most easily achieved by
placing the speakers as far for-
ward as possible.
09
Choosing mounting locations
which satisfy all of the above cri-
teria will provide the most satis-
fying performance.
3. Treble is directional in nature.
This means that high frequencies
are reduced as you move off the
tweeter's axis. The angle mounts
will allow the GTC04 tweeters to
be pointed across the car to the
listener on the opposite side. This
will make each listener slightly
off-axis to the tweeter that is
closest to that listener, which
helps to compensate for the fact
that the listener is always closer
to one tweeter than to the other
(see Figure 6).
Figure 6
1. The most spacious stereo
image is achieved when the left
and right speaker systems are
placed as wide apart as possible.
Amplifier output
set at Full Range or
High Passed at f > 80Hz
should have their extremely low
frequencies blocked by electrical
means. Active or passive cross-
overs can be used in order to
System Design
10
There are a variety of system
Right
Left
options available with the
+
–
–
+
Component System. The simplest
configuration is to use them full
range with their built-in passive
crossovers by connecting them to
the output of a head unit or an
amplifier (Figures 7 and 8).
If you want to build your system
using active (electronic)
achieve the best system fidelity
and widest dynamic range. Cross-
over frequency recommendations
are given in the Specifications.
GTC
–
–
Midwoofers
–
-
-
Left
Right
+
–
–
+
In-line
Capacitor
GTC04
crossovers, with separate ampli-
fiers to drive the tweeter and
midwoofers, you can bypass the
capacitor on the tweeter and the
coil on the midwoofer (Figure 9).
A more advanced system design
can be achieved by adding a GT,
Tweeters
GTC
Midwoofers
–
Left
Channel
Right
Channel
–
–
GTC Component System
connected to speaker outputs of
a High-Powered Head Unit
In-line
Capacitor
Figure 7
GTC04
Tweeters
x
GT , GTi, or equivalent sub-
Left
Channel
Right
Channel
woofer to your component sys-
tem. In this case the component
system will be used as high and
midbass frequency drivers and
GTC04 Connected to GTC Midwoofer,
GTC Midwoofer Connected to Amplifier
Figure 8
• Make sure that it will be easy to
run connecting wires to the
speakers. Trace speaker wire
paths before you undertake
mounting.
Installation Warnings
and Tips
Electronic
Crossover
Lo-Pass
Hi-Pass
11
• Be careful not to cut or drill
into fuel tanks, fuel lines, brake
or hydraulic lines, vacuum lines
or electrical wiring when work-
ing on your vehicle. Inspect
behind panels before you cut or
drill.
Amp for
Woofers
f < 5khz
Amp for
Tweeters
f > 5khz
• Always disconnect the ground
wire from the battery before
doing any work on the vehicle.
CAUTION: Fuel tanks are
located directly beneath the rear
deck in some cars. Check for
adequate speaker basket clear-
ance before considering this
location!
Left
Right
• Make sure that the midwoofer
will physically fit in the mount-
ing location. If door mounting,
check for adequate clearance
with the window in both rolled-up
and rolled-down positions as well
as for interference with window
crank and power window mecha-
nism. If mounting elsewhere,
check for clearance around rear
deck torsion bars, glove box or
other structural elements.
+
–
GTC
Midwoofers
–
GTC04
Tweeters
Right
Channel
Left
Channel
GTC04 and GTC Midwoofer Connected
Directly to Amplifier
• Do not mount speakers where
water may splash on the cones.
Figure 9
As a general rule, do not turn up
the volume control past the point
where you hear distortion in the
form of either signal distortion
from an overdriven amplifier or
mechanical noise from an over-
stressed speaker.
If you want your system “Loud +
Clear,” we suggest that you step
up to a JBL power amplifier
which has an RMS power rating
equal to, but not exceeding the
Maximum Recommended
WARNING: Playing loud music
over 120dB can permanently
damage your hearing. The maxi-
mum volume levels achievable
with JBL components and high
power amplification may exceed
safe levels for extended listening.
When listening at high volume
levels, always use hearing protec-
tion or turn it down!
A Note on Power
12
Handling
As a result of their high effi-
ciency, all JBL loudspeakers will
produce reasonable volume levels
in the automotive environment
using very little amplifier power.
However, the use of a small
amplifier to attain very high vol-
ume levels could lead to over-
driving the amplifier. This will
generate high distortion levels
which can easily damage loud-
speakers, even if the rated power
of the amplifier is below the rated
maximum power handling of the
loudspeaker!
Amplifier Power listed in the
specifications of your specific
JBL speaker. This margin of
reserve power will ensure that
the amplifier will not attempt to
deliver more power than its
design allows. Your dealer will be
happy to point out which high
power JBL amplifiers are opti-
mum for your application and
listening habits.
For the best performance and
system reliability, you should
select an amplifier with an output
rating greater than the maximum
power likely to be used to gener-
ate the desired volume levels.
Following these guidelines will
provide virtually distortion-free
sound reproduction and long loud-
speaker life.
Specifications
Component Systems
Model
GT6.0c
GT5.0c
GT4.0c
13
Grand Touring Automotive
6-1/2" 2-way Component
System
Grand Touring Automotive
5-1/4" 2-way Component
System
Grand Touring Automotive
4" 2-way Component
System
1" Titanium Composite
1" Titanium Composite
1" Titanium Composite
Balanced-Drive Neodymium
Magnet Tweeter with 1/2"
Dome. Surface and Flush
Mounting Brackets Supplied
Balanced-Drive Neodymium
Magnet Tweeter with 1/2"
Dome. Surface and Flush
Mounting Brackets Supplied
Balanced-Drive Neodymium
Magnet Tweeter with 1/2"
Dome. Surface and Flush
Mounting Brackets Supplied
Graphite-Reinforced
Graphite-Reinforced
Graphite-Reinforced
Polytex Woofer Cone
Polytex Woofer Cone
Polytex Woofer Cone
with Butyl Rubber Surround
with Butyl Rubber Surround
with Butyl Rubber Surround
Speaker Impedance
4 Ohms
4 Ohms
4 Ohms
Recommended Amplifier
Power Range
5 – 125 Watts RMS
5 – 110 Watts RMS
5 – 100 Watts RMS
Frequency Response
Sensitivity
50Hz – 21kHz
91dB
60Hz – 21kHz
90dB
70Hz – 21kHz
90dB
Mounting Depth
Drop In:
2-3/16"
2-9/16"
2-3/8"
2-1/2"
1-3/8"
2"
Bottom Mount:
Warranty Terms: 1 Year Transferable Limited Warranty / 2 Year Extended Transferable Limited Warranty (USA Only)
This is an important document.
Attach your bill of sale to this
page and keep it in a safe place.
Your bill of sale is your warranty.
The JBL warranty remains in
effect for one year from the date
of the first consumer purchase
unless installed by an authorized
JBL dealer. Installation by an
authorized JBL dealer will extend
the warranty to a period of two
years.
include incidental or consequential
damages. JBL reserves the right
to replace a discontinued model
with a comparable model. Any
replacement units or parts may
be new or rebuilt.
What is Covered by this Warranty
Except as specified below, the JBL
warranty covers all defects in
material and workmanship. The
following are not covered: Damage
caused by accident, misuse, abuse,
product modification or neglect;
damage occurring during ship-
ment; damage from failure to
follow instructions contained in
the instruction manual; damage
resulting from the performance of
repairs by someone not authorized
by JBL; damage caused by instal-
lation of parts that do not conform
to JBL specifications; units used for
commercial or business use; any
claims based on misrepresenta-
tions by the seller; products sold on
an “as-is” or final sale basis; or the
cost of installing, removing, or
reinstalling the unit. JBL’s liability
is limited to the repair or replace-
ment, at our option, of any
Do Not Return Products to the JBL
Factory without Authorization.
They will be Returned Unopened.
You are responsible for transport-
ing your product for repair or
replacement. JBL will pay reason-
able return charges for delivery
to any location in the United States
if the repair or replacement is
covered under the warranty.
14
To Obtain Warranty Service
If you require warranty service,
please return the product to your
dealer. If this is not possible and
you live in the United States,
please call 1-800-336-4JBL, for
information on how to obtain
service or replacement.
Correspondence with JBL should be
addressed to: JBL Customer
Service, 80 Crossways Park West,
Woodbury, NY 11797 or fax us at
516-496-0812. Outside the United
States, please contact your local
distributor.
This warranty gives you specific
legal rights. You may also have
other rights which vary from state
to state. Some states do not allow
the exclusion or limitation of
incidental or consequential
Who is Protected by this Warranty
The JBL warranty protects the
original owner and all subsequent
owners providing that the JBL
product was purchased from an
authorized dealer in the United
States or purchased by military
personnel from an authorized
military outlet. A copy of the
original dated bill of sale must be
presented whenever warranty
service is required.
If purchased outside the United
States, contact your local dealer
for repair or replacement.
damages or limitations on how long
an implied warranty lasts, so the
above may not apply to you.
defective product and shall not
15
Declaration of Conformity
We, JBL Europe A/S
Kongevejen 194B
DK-3460 Birkerød
DENMARK
declare in own responsibility, that the products
described in this owner’s manual are in compliance
with technical standards:
EN 50 081-1/1992
EN 50 082-1/3.1995
Steen Michaelsen
JBL Europe A/S
Birkerød. DENMARK. 5/96
JBL Consumer Products, Inc.
80 Crossways Park West
Woodbury, NY 11797
8500 Balboa Blvd.
Northridge, CA 91329
800-336-4JBL (4525)
A Harman International Company
Part No. GT405060OM
Made in China
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