User manual JBL GT6.0C

[. . . ] Both the GTC04 and the midwoofer have high-quality passive crossover parts already built into them. Figure 2 is an illustration of the proper wiring procedure of the Component System. Tweeter Installation The GTC04 has been supplied with both Angle and Flush mounting brackets. Figures 1 and 2 show the proper way to flushand angle-mount the GTC04. The mounting hole diameter for the flush-mount frame is 1-3/4". [. . . ] The best center image will be achieved when the distance from the left speaker and the right speakers are as equal as possible from your listening position. This is most easily achieved by placing the speakers as far forward as possible. This means that high frequencies are reduced as you move off the tweeter's axis. The angle mounts will allow the GTC04 tweeters to be pointed across the car to the listener on the opposite side. This will make each listener slightly off-axis to the tweeter that is closest to that listener, which helps to compensate for the fact that the listener is always closer to one tweeter than to the other (see Figure 6). The best system integration is achieved when the tweeter is mounted close to the midwoofer speaker. This helps smooth the transition from the midrange and tweeter crossover point. Choosing mounting locations which satisfy all of the above criteria will provide the most satisfying performance. 09 Figure 6 System Design 10 There are a variety of system options available with the Component System. The simplest configuration is to use them full range with their built-in passive crossovers by connecting them to the output of a head unit or an amplifier (Figures 7 and 8). If you want to build your system using active (electronic) crossovers, with separate amplifiers to drive the tweeter and midwoofers, you can bypass the capacitor on the tweeter and the coil on the midwoofer (Figure 9). A more advanced system design can be achieved by adding a GT, GTx, GTi, or equivalent subwoofer to your component system. In this case the component system will be used as high and midbass frequency drivers and should have their extremely low frequencies blocked by electrical means. Active or passive crossovers can be used in order to achieve the best system fidelity and widest dynamic range. Crossover frequency recommendations are given in the Specifications. Amplifier output set at Full Range or High Passed at f > 80Hz Left + ­ ­ + Right ­ ­ GTC Midwoofers ­ Left + - ­ ­- + Right In-line Capacitor GTC04 Tweeters Left Channel Right Channel ­ ­ GTC Midwoofers ­ GTC Component System connected to speaker outputs of a High-Powered Head Unit In-line Capacitor GTC04 Tweeters Left Channel Right Channel Figure 7 GTC04 Connected to GTC Midwoofer, GTC Midwoofer Connected to Amplifier Figure 8 Lo-Pass Amp for Woofers f < 5khz Left Electronic Crossover Hi-Pass Amp for Tweeters f > 5khz Right 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. · Make sure that the midwoofer will physically fit in the mounting location. If door mounting, check for adequate clearance with the window in both rolled-up and rolled-down positions as well as for interference with window crank and power window mechanism. If mounting elsewhere, check for clearance around rear deck torsion bars, glove box or other structural elements. · Do not mount speakers where water may splash on the cones. ­ GTC04 Tweeters Left Channel GTC04 and GTC Midwoofer Connected Directly to Amplifier Figure 9 ­ GTC Midwoofers · Make sure that it will be easy to run connecting wires to the speakers. Trace speaker wire paths before you undertake mounting. · Always disconnect the ground wire from the battery before doing any work on the vehicle. CAUTION: Fuel tanks are located directly beneath the rear deck in some cars. Check for adequate speaker basket clearance before considering this location! 11 + Right Channel 12 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. [. . . ] JBL will pay reasonable return charges for delivery to any location in the United States if the repair or replacement is covered under the warranty. Correspondence with JBL should be addressed to: JBL Customer Service, 80 Crossways Park West, Woodbury, NY 11797 or fax us at 516-496-0812. Outside the United States, please contact your local distributor. This warranty gives you specific legal rights. [. . . ]