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

Thank you for purchasing the finest

Automotive Component Systems 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 professionally 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 408 and 508GTi systems.

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
408 or 508GTi in typical installations.
Consult your JBL dealer, or a qualified
technician, for more information.

The 408 and 508GTi systems are built

to meet the same rigorous standards of
construction and performance that have
long established JBL’s renowned home
and professional speaker systems. The
408 and 508GTi Woofer/Midranges
incorporate advanced JBL woven Kevlar
cones which are especially suited to the
unique acoustic and environmental
conditions which characterize automotive
sound. The 408 and 508GTi Tweeter
incorporates advanced JBL pure titanium
technology which is especially suited to
the unique acoustic environment of
modern vehicles. The 408 and 508GTi
have been engineered to provide excellent
power handling, good dispersion and
balanced frequency response, along with
minimum size and flexible installation
options for optimizing placement within the
vehicle.

The small size of the GTi Drivers is

made possible through the use of a
Neodymium magnet assembly with JBL’s
Stray Field Containment Geometry. By

3

408/508 MANUAL.QXP  7/17/98 11:21 AM  Page 3