O8GTi AUTOMOTIVE TITANIUM DOME TWEETER INSTALLATION GUIDE GTi 8 0 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 2 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. 3 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 4 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 fre5 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 6 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: 7 1. 2. 3. The most spacious stereo image is achieved when the 08GTi's are placed as wide apart as possible. 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. 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. 8 4. 5. 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. You will get the best frequency response when the path from the tweeter to your ear is unobstructed. 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. Installation Warnings and Tips Be careful not to cut or drill into fuel tanks, fuel lines, brake 9 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! 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. 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 10 d) Twist the tweeter clockwise about 1/4" to lock it into position. D C A Figure A B SURFACE MOUNT INSTALLATION 11 Surface Angle Mounting Instructions a) Using the Surface Angle Mount template at the back of the manual, drill two screw holes at the desired mounting location. Secure the Surface angle mount adapter with two 3/4" sheet metal screws as shown in figure B. b) Secure the mounting plate to surface angle mount adapter using two 5/16" screws. c) Run the included speaker wire with the 08GTi crossover to the wire through hole and connect the wire to the tweeter making sure to connect + to + and ­ to ­. d) Push the tweeter down onto the mounting plate making sure to line up the bayonet tabs with the slots in the tweeter housing. e) Twist the tweeter clockwise about 1/4" to lock it into position. 12 D A C B Figure B SURFACE ANGLE INSTALLATION 13 Flush Mounting Instructions a) Use a hole saw or other tool and the Flush Mount Template at the back of this manual to make a hole for the flush mount cup in the desired location. Secure the metal spring to the flush mount cup using one metal spring screw as shown in figure C. Tighten the screw only enough to keep the metal spring from falling off. b) Push the flush mount cup with the metal spring into the hole that was cut in step a. c) Tighten the larger 3/4" spring mounting screw to lock the flush mounting cup into the mounting hole. Flush Mount Cup A C B Figure C FLUSH MOUNT INSTALLATION 14 d) Secure the mounting plate to the flush mount cup using three 5/16" screws. Connect the speaker wire to the tweeter. (See Figure D) e) Push the tweeter down onto the mounting plate making sure to line up the bayonet tabs with the slots in the tweeter housing. f) Twist the tweeter clockwise about 1/4" to lock it into position. FLUSH MOUNT INSTALLATION Figure D E F D 15 Flush Angle Mounting Instructions a) Follow steps a through c in the Flush Mounting Instructions. b) Secure the flush angle mount adapter to the flush mount cup using two 5/16" screws as shown in Figure E. c) Connect the 08GTi speaker wires (with crossover) to the tweeter. d) Press the tweeter down onto the flush angle mount adapter lower portion making sure to line up the snaps with the slots in the tweeter housing. 16 e) Snap the other portion of the tweeter down onto the angle adapter. E D FLUSH ANGLE INSTALLATION Wiring Use 2-conductor stranded type, insulated wire to connect the 08GTi to it's crossover, and the crossover to the amplifier. A minimum wire gauge of 18AWG is recommended, with larger size suggested for wire runs longer than 10 feet. The polarity -- the positive/ negative orientation of the connections for every speaker to amplifier connection must be consistent from left to right channel to assure proper imaging and optimum frequency response. This does not mean that the 17 Figure E 08GTi should always be connected in the same polarity as the midrange however. It is possible, that due to the difference in the distance the sound travels from the midrange to your ears compared to the distance from the tweeters in a typical system, and the short wavelengths of sound at the crossover frequency, that a connection where the tweeters are connected in reverse polarity from the other drivers in the system may actually result in better sound. Because there is no way to accurately predict this before 18 installation, we recommend that you try the connection both ways, and leave it in the polarity that gives the smoothest audible transition between the midrange and tweeter. The JBL standard for polarity marking uses the solid red wire as positive (+) and the black striped wire as negative (­). System Connections: There are a variety of system options available with the 08GTi. The simplest configuration is to use the 08GTi connected in parallel to a full range speaker system. Because the 08GTi is specifically designed for high frequency operation, it must have low frequencies blocked by electrical means to prevent damage to the speaker. To facilitate this, the 08GTi is supplied with an in-line 12dB per octave 5kHz high-pass filter. We call this a "protection network". This allows you to use the 08GTi as an add-on to an existing system by attaching the supplied protecti ...