User manual JBL S119

[. . . ] 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 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 404 and 504GTi systems. [. . . ] As a direct result, excellent performance may be achieved in any vehicle. Due to the wide variety of vehicles, there is more than one "right" way to locate the 404 and 504GTi. Knowledge of the following considerations will help you get the most from your system: 5 1. 2. 3. 4. The most spacious stereo image is achieved when the speakers 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 404 and 504GTi as far forward as you can. You will get the best frequency response when the path from the speakers to your ear is unobstructed. Because of the high acoustic energy capability of the 404 and 504GTi, they must be securely mounted in a rigid panel which is free from resonances, rattles and air leakage. 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. When door mounting the speakers, make sure there is sufficient clearance for windows, electric window motors or cranks, and linkages. Be sure to check for clearance of window, cranks and linkages when mounting speakers in door panels. Failure to securely mount this product could result in damage or injury, particularly in the event of an accident. Although the materials used on the 404 and 504GTi are inherently water resistant, do not mount the speakers where they will get wet. Run speaker wire to the hole location, making sure that either an active or the included passive crossover is connected before the speaker. This does not mean that the Coupled ComponentsTM should always be connected in the same polarity as the woofer/midbass or subwoofer however. It is possible, due to the difference in the distance that the sound travels from the Coupled ComponentsTM to your ears, compared to the distance from the subwoofer or woofer/midbass, and the wavelengths of sound at the crossover frequency, that a connection where the subwoofer or woofer/midbass are connected in reverse polarity from the Coupled ComponentTM drivers may actually result in better sound. Because there is no way to accurately predict this before installation, we recommend that you try the connection both ways, and leave it in the polarity that gives the smoothest audible transition between the Coupled ComponentsTM and the subwoofer or woofer/midbass. Some active crossovers, such as the JBL GTX47, have a phase switch which enables you to easily switch polarity. When the subwoofer or woofer/midbass and Coupled ComponentsTM are mounted close to each other, the in-phase connection will usually yield the best sound. System Connections There are a variety of system options available with the 404 and 504GTi. Although this will yield good sound, the best performance will be achieved in a high-end system which includes subwoofers and, optionally, midbass transducers. Because the 404 and 504GTi are specifically designed for mid and high frequency operation, they should have their extremely low frequencies blocked by electrical means in order to achieve the best system fidelity and the widest dynamic range. However, full range use may be obtained at slightly lower power handling levels. TWEETER WOOFER INPUT 10 For the best performance, we recommend that an active crossover with a minimum of 12dB per octave slope be used for the transition point between the Subwoofer and the 404 or 504GTi. The optimum crossover frequency for this transition is dependent on the specific components used, the vehicle, and other installation details. As a general rule, the crossover frequency should be as low as possible to achieve the best system imaging. [. . . ] To remove this cover simply press on the end of the cover (as shown in Figure G) and lift off. The adjustment of the tweeter level is done by setting the switch on the crossover (see Figure H) to the "0dB", "­2dB" or "­4dB" position. Both crossovers should have this switch set in the same position. LIFT PRESS Figure G OdB ­2dB ­4dB Figure H Speaker Break-In The 404 and 504GTi woofer/ midranges use many high strength materials which require benefit from a break-in period before they will achieve top performance. After a break-in period of about 1-hour at moderate volume the drivers will achieve peak performance. A Note on Power Handling As a result of their high efficiency, all JBL loudspeakers will produce reasonable volume levels in the automotive environment using very little amplifier power. [. . . ]