600 GTi - JBL Car Audio User Guide / Operation Manual. Page 3

Thank you for purchasing the finest

automotive Component woofer/midbass
transducer JBL has ever produced. As a
GTi Competition Series owner, you are a
member of a select group of people who
enjoy the most advanced mobile audio
products available. We call this group 
“Club GTi.” By sending in the customer
information card, which you will find
attached to your warranty, we will
automatically register you as a Club GTi
member which will give you access to
exclusive Club GTi apparel and other
special offers we will make available from
time to time. We suggest you fill the card
out at your earliest convenience.

Also, be sure to save your sales

receipt in a safe place. It will be necessary
to use this document as proof of purchase
in the event that you ever need warranty
service. It is also useful for insurance
purposes and for establishing value when
you re-sell your vehicle. 

Because of the performance capability

of your GTi Competition Series product,
and the variety of potential system
configurations, we strongly recommend
that you have the system professionally
installed. You will also get a better
warranty if your equipment is pro-
fessionally installed by an authorized
GTi dealer and you have your warranty
card stamped. This manual provides
information on installation and usage to
help a skilled technician get the most from
your GTi Competition Series product. This
manual does not cover basic information
about installation which is common
knowledge to a professional installer,
except for information which is unique to
the 600GTi Woofer/Midbass.

If you feel you possess the necessary

skills, and prefer to install the equipment
yourself, this manual will provide you with
the necessary specifics to properly use the
600GTi in typical installations. Consult
your JBL dealer, or a qualified technician,
for more information.

The 600GTi Woofer/Midbass is built to

meet the same rigorous standards of con-
struction and performance that have long
established JBL's renowned home and
professional speaker systems. The 600GTi
Woofer/Midbass incorporates a high poly-
mer laminate pulp cone which is especially
suited to the unique acoustic and environ-
mental requirements for an automotive
woofer/midbass unit. The 600GTi has
been engineered to provide excellent
power handling, optimum transient attack
and balanced frequency response.

The 600GTi Woofer/Midbass uses a

cast frame to secure the powerful Barium
Ferrite Magnet based motor structure.
The rigid cast frame prevents resonance
and flexing in the frame thus reducing
distortion. In the 600GTi, the high con-
centration of magnetic power generated
by the large motor structure is coupled to a
2" Edge-wound Aluminum Wire High
Temperature Fiberglass Voice Coil. This
powerful motor structure delivers dynamic
midbass while its large diameter and

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