JBL 08 GTI, A08GTI User Manual

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AUTOMOTIVE TITANIUM DOME TWEETER INSTALLATION GUIDE

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Table of Contents
Welcome to Club GTi............................................	3
About this Manual .................................................	4
Autosound at its Best ............................................	5
Designing Your System ........................................	6
Component Placement..........................................	7
Installation Warnings and Tips..............................	9
Mounting Instructions ..........................................	10
Surface Mounting Instructions ............................	10
Surface Angle Mounting Instructions ..................	12
Flush Mounting Instructions ................................	14
Flush Angle Mounting Instructions......................	16
Wiring ..................................................................	17
System Connections ...........................................	18
A Note on Power Handling .................................	22
In Case of Difficulty .............................................	23
Specifications ......................................................	25
Templates ......................................................	26-29

Welcome to Club GTi

Thank you for purchasing the finest automotive tweeter 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.

About This Manual

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. This manual provides information on the installation and use 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 08GTi.

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 08GTi in typical installations. Consult your JBL dealer, or a qualified technician, for more information.

Autosound at its Best

The 08GTi has been built to meet the same rigorous standards of construction and performance that have long established JBL’s renowned home and professional speaker systems. The 08GTi incorporates advanced JBL pure titanium technology which is especially suited to the unique acoustic environment of modern vehicles. The 08GTi has been engineered to provide excellent dispersion and frequency response, along with minimum size and flexible installation options for optimizing

placement within the vehicle. Pure titanium has long been

known to have a very high stiffness to weight ratio, making it ideal for treble reproduction. However, only JBL has “tamed” titanium through a special manufacturing process. The dome of the 08GTi is created using special nitrogen gas cooled forming machines which can create a uniformly paper-thin dome without the work-hardening or deformation which causes resonances in domes made without benefit of this process.

The result is exceptionally smooth and detailed high fre-

quency music reproduction to beyond 20,000Hz, high output capability, and a clean sound that cuts through road noise.

Designing Your System

The availability of separate components makes a variety of system designs possible.

Because of its wide-range design and variety of mounting options, the 08GTi is perfect for many different applications. The overall quality of any system design is a result of how well all of the components work together, not just the result of the performance of

any one component. JBL GTi Competition Series midrange, midbass, and subwoofer transducers are the ideal companion products to your 08GTi. Each of the GTi Competition Series components is designed to complement the others to provide the highest performance with the simplest and most predictable system design. The 08GTi may be used as the primary high frequency transducer in a system, or as an add-on tweeter or super tweeter used to improve the high frequency response of an existing system. A high-pass filter is included to facilitate use of the

08GTi as an add-on tweeter. To use the 08GTi as the primary high frequency transducer in a high quality system, we recommend you use either a high quality active crossover such as JBL’s GTX47, or GTX2. If you prefer passive crossovers, we suggest a complete 408GTi or 508GTi system which includes the 08GTi, an outstanding 4" or 51⁄4" midrange, and a laboratoryoptimized crossover. Your GTi Competition series dealer is uniquely qualified to help guide you on the best system configuration for your needs.

Component Placement

The location of each of the loudspeakers plays a vital role in achieving proper frequency response and spacious imaging. Because the 08GTi has an extremely wide and smooth dispersion pattern, and because it is supplied with extremely versatile mounting hardware, excellent performance may be achieved in any vehicle. Due to the wide variety of vehicles, there is not one “right” way to locate the 08GTi, however knowledge of the following considerations will help you get the most from your system:

1.The most spacious stereo image is achieved when the 08GTi’s are placed as wide apart as possible.

2.The best center image will be achieved when the distance from the left speaker to your left ear is as equal as possible to the distance from the right speaker to your right ear. This is most easily achieved by placing the 08GTi as far forward as

you can.

3.Treble is directional in nature. High frequencies fall off as you move off of the tweeter’s axis. Because of this, you

can improve imaging by using the angle-mount capabilities of the 08GTi to point each tweeter’s axis across the car to the listener on the opposite side. This will make each listener slightly off-axis of the tweeter they are closest to, which helps to compensate for the fact that they are always closer to one tweeter than to the other.

4.The best system integration is achieved when the tweeter is mounted close to the midrange speaker. Installing the tweeter close to the midrange helps smooth the transition from the midrange to the tweeter at the crossover point.

5.You will get the best frequency response when the path from the tweeter to your ear is unobstructed.

Installation Warnings

and Tips

Be careful not to cut or drill into fuel tanks, fuel lines, brake

or hydraulic lines, vacuum lines or electrical wiring when working on your vehicle. Inspect behind panels before you cut or drill.

Do not use the 08GTi unmounted. Failure to securely mount this product could result in damage or injury, particularly in the event of an accident.

Do not mount the 08GTi where it will get wet.

Always disconnect the ground wire from the battery before doing any work on the vehicle.

Mounting Instructions:

The 08GTi tweeter includes accessories for four different mounting configurations. Take a look at all the possibilities described in the following paragraphs, pick one, follow the steps and you’ll soon be done!

Surface Mounting

Instructions

a) Using the Mounting Plate Template at the back of this manual. Pick a mounting location for the tweeter making sure that speaker wire can be run to this location. Flat surfaces

work best. Drill the holes as shown on the template in the desired mounting location. Use three 3⁄4" mounting screws to secure the mounting plate in place as shown in Figure A.

b)Run the included speaker wire with the 08GTi crossover to the wire feed-through hole and connect the wire to the tweeter making sure to connect + to + and – to –.

c)Push the tweeter down onto the mounting plate making sure to line up the bayonet tabs with the slots in the tweeter housing.

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